diff --git a/.firebase/hosting.YnVpbGQ.cache b/.firebase/hosting.YnVpbGQ.cache
index def137c..7c40981 100644
--- a/.firebase/hosting.YnVpbGQ.cache
+++ b/.firebase/hosting.YnVpbGQ.cache
@@ -1,14 +1,14 @@
-favicorn.svg,1755761307597,e80dddc27b301efdf9e44c2df1952423ea4b443d9ef1fe22f4bbc3797a0f7a73
-asset-manifest.json,1769145784811,7003c3de58911ea083c6b4c996323b85197ee04ff75892bc1d4c0f641015a522
 robots.txt,1755761307597,b2090cf9761ef60aa06e4fab97679bd43dfa5e5df073701ead5879d7c68f1ec5
+prodhub.svg,1755761307597,c9ccf834f48ca21eaeda0f5566073e9f6757b1e14aaf82591d5afd1486ac39ba
 manifest.json,1755761307597,4368aeaf848ae2e048765562c289452f33ad2a175c4b1951ea8bdf2ada0d5b10
-static/js/main.ed1316f0.js.LICENSE.txt,1769145784829,016d7efb946774a48216c296cff20c2b87a782bac74ad8d5a1808a48879486df
-index.html,1769145784811,8bc49c33b64813d87cf40385c7a8716995325053ca57701670095b2d5687e12b
-static/css/main.4409151e.css.map,1769145784827,7dd7f69674e3cf47346aebcac1862d1851d6f1e9fb45159a938e2918f8ee8cfc
+logo512.png,1755761307597,212b102aa09e51b3b3e06647e81f7801a61333e171f6582e8124379aabccb41d
 logo192.png,1755761307597,79e2b749561016bc8af300ea19f48347ceed3cb1a54f48ae456172eca45e08f0
-static/css/main.4409151e.css,1769145784827,5d4ab4f8c7df3fafa8c4bcbf5364d12f6628b371e2cccd12c5d5e03252317ccc
+favicorn.svg,1755761307597,e80dddc27b301efdf9e44c2df1952423ea4b443d9ef1fe22f4bbc3797a0f7a73
 favicon.ico,1755761307597,27edce7be5922cf0bef7d4136f69b5bfbdd5bf8c13c7b026f71187d41a00aa7d
-logo512.png,1755761307597,212b102aa09e51b3b3e06647e81f7801a61333e171f6582e8124379aabccb41d
-prodhub.svg,1755761307597,c9ccf834f48ca21eaeda0f5566073e9f6757b1e14aaf82591d5afd1486ac39ba
-static/js/main.ed1316f0.js,1769145784829,9b44dbd94b84b0732dbff34210e2d2e9a9ab671ba9f29182eed7949187977881
-static/js/main.ed1316f0.js.map,1769145784830,438f6987590f4ffea01fb79415dd8fe340f043f1ae9aa7cbc0c8ac4975d8779c
+index.html,1769584165848,7586066520dd701ac52e9e90bddbe8ca563f3019a8e1e4c9b6eff2907821ad1d
+static/js/main.1a6ef1f3.js.LICENSE.txt,1769584165861,016d7efb946774a48216c296cff20c2b87a782bac74ad8d5a1808a48879486df
+asset-manifest.json,1769584165848,c9c029a4709b7926190cebbb694f56283bad2f51b8a734a11de36bf9ab4b1563
+static/css/main.4409151e.css.map,1769584165863,7dd7f69674e3cf47346aebcac1862d1851d6f1e9fb45159a938e2918f8ee8cfc
+static/css/main.4409151e.css,1769584165861,5d4ab4f8c7df3fafa8c4bcbf5364d12f6628b371e2cccd12c5d5e03252317ccc
+static/js/main.1a6ef1f3.js,1769584165863,ac21c3362d716d7f51e1d0dd96d61a5f29e7f8f8de21bbd8de6593c502891438
+static/js/main.1a6ef1f3.js.map,1769584165870,2f58d5fb3ea4a1e82669952fbae4763de61875ee5f32a2e7f394538648e6eee0
diff --git a/src/App.js b/src/App.js
index 164e859..98949f9 100644
--- a/src/App.js
+++ b/src/App.js
@@ -1,140 +1,19 @@
-import React, { useState, useEffect, useMemo } from 'react';
-import { initializeApp } from 'firebase/app';
-import { getAuth, onAuthStateChanged, GoogleAuthProvider, signInWithPopup, signOut, createUserWithEmailAndPassword, signInWithEmailAndPassword } from 'firebase/auth';
-import { getFirestore, collection, doc, addDoc, updateDoc, deleteDoc, onSnapshot, query, where, getDocs, writeBatch } from 'firebase/firestore';
-import { Book, Calendar, CheckSquare, ChevronDown, ChevronRight, Clock, Edit2, Flame, Info, LogOut, Plus, Repeat, Save, Sparkles, Tag, Trash2, TrendingUp, X } from 'lucide-react';
-import { callGeminiWithRetry } from './services/geminiService';
+import React, { useEffect, useMemo, useState } from 'react';
+import { collection, onSnapshot, query } from 'firebase/firestore';
+import { useAuth } from './contexts/AuthContext';
+import { appId, GOOGLE_CLIENT_ID, isFirebaseConfigured } from './config/env';
+import { db } from './config/firebase';
+import { createCalendarTokenClient, loadGoogleIdentityScript } from './services/googleCalendar';
+import LoginScreen from './components/auth/LoginScreen';
+import ConfigurationNeeded from './components/layout/ConfigurationNeeded';
+import Sidebar from './features/sidebar/Sidebar';
+import Dashboard from './features/dashboard/Dashboard';
+import ProjectDetail from './features/project/ProjectDetail';
+import AllTasksView from './features/tasks/AllTasksView';
+import ScheduleView from './features/schedule/ScheduleView';
+import HabitTrackerView from './features/habits/HabitTrackerView';
+import WeeklyReviewView from './features/review/WeeklyReviewView';
 
-// --- Firebase Configuration ---
-const firebaseConfig = {
-  apiKey: process.env.REACT_APP_FIREBASE_API_KEY,
-  authDomain: process.env.REACT_APP_FIREBASE_AUTH_DOMAIN,
-  projectId: process.env.REACT_APP_FIREBASE_PROJECT_ID,
-  storageBucket: process.env.REACT_APP_FIREBASE_STORAGE_BUCKET,
-  messagingSenderId: process.env.REACT_APP_FIREBASE_MESSAGING_SENDER_ID,
-  appId: process.env.REACT_APP_FIREBASE_APP_ID
-};
-
-const appId = 'my-prod-hub';
-const GOOGLE_CLIENT_ID = process.env.REACT_APP_GOOGLE_CLIENT_ID || "";
-
-// --- Firebase Initialization ---
-let app;
-let auth;
-let db;
-
-const isFirebaseConfigured = firebaseConfig.apiKey && firebaseConfig.apiKey !== "YOUR_API_KEY";
-
-if (isFirebaseConfigured) {
-    try {
-        app = initializeApp(firebaseConfig);
-        auth = getAuth(app);
-        db = getFirestore(app);
-    } catch (error) {
-        console.error("Firebase initialization error:", error);
-    }
-}
-
-// --- Helper Functions ---
-const formatDate = (date) => {
-    if (!date) return 'N/A';
-    // Handles both Firestore Timestamps and JS Date objects
-    const d = date instanceof Date ? date : date.toDate();
-    return new Intl.DateTimeFormat('en-US', { year: 'numeric', month: 'short', day: 'numeric' }).format(d);
-};
-
-const formatTime = (date) => {
-    if (!date) return '';
-    const d = new Date(date);
-    // Check if it's an all-day event (time is midnight UTC)
-    if (d.getUTCHours() === 0 && d.getUTCMinutes() === 0 && d.getUTCSeconds() === 0) {
-        return 'All-day';
-    }
-    return new Intl.DateTimeFormat('en-US', { hour: 'numeric', minute: '2-digit', hour12: true }).format(d);
-};
-
-const getLocalDateKey = (date) => {
-    const d = new Date(date);
-    // Adjust for timezone offset to get the correct local date
-    d.setMinutes(d.getMinutes() - d.getTimezoneOffset());
-    return d.toISOString().split('T')[0]; // YYYY-MM-DD
-};
-
-// --- Configuration Error Component ---
-function ConfigurationNeeded({ missingFirebase, missingGoogle }) {
-  return (
-    <div className="flex items-center justify-center h-screen bg-gray-900 text-white p-8">
-      <div className="bg-yellow-900/50 border border-yellow-700 rounded-lg p-8 max-w-2xl text-center">
-        <Info size={48} className="text-yellow-300 mx-auto mb-4" />
-        <h1 className="text-3xl font-bold text-yellow-200 mb-4">Configuration Required</h1>
-        {missingFirebase && <div className="text-left bg-gray-800 p-4 rounded-md mb-4"><p className="text-gray-300 mb-2"><strong>Firebase Config Missing:</strong> Please ensure your Firebase environment variables (REACT_APP_FIREBASE_*) are set correctly in your <code>.env.local</code> file.</p></div>}
-        {missingGoogle && <div className="text-left bg-gray-800 p-4 rounded-md"><p className="text-gray-300 mb-2"><strong>Google Client ID Missing:</strong> Please ensure REACT_APP_GOOGLE_CLIENT_ID is set in your <code>.env.local</code> file to enable Google Calendar sync.</p></div>}
-      </div>
-    </div>
-  );
-}
-
-// --- Login Screen Component ---
-function LoginScreen() {
-    const [email, setEmail] = useState('');
-    const [password, setPassword] = useState('');
-    const [error, setError] = useState('');
-    const [isSigningUp, setIsSigningUp] = useState(false);
-
-    const handleGoogleSignIn = async () => {
-        const provider = new GoogleAuthProvider();
-        try {
-            await signInWithPopup(auth, provider);
-        } catch (error) {
-            setError(error.message);
-            console.error("Google Sign-In Error:", error);
-        }
-    };
-
-    const handleEmailAuth = async (e) => {
-        e.preventDefault();
-        setError('');
-        try {
-            if (isSigningUp) {
-                await createUserWithEmailAndPassword(auth, email, password);
-            } else {
-                await signInWithEmailAndPassword(auth, email, password);
-            }
-        } catch (error) {
-            setError(error.message);
-        }
-    };
-
-    return (
-        <div className="flex items-center justify-center h-screen bg-gray-900 text-white">
-            <div className="w-full max-w-md p-8 space-y-6 bg-gray-800 rounded-lg shadow-lg">
-                <div className="text-center">
-                    <h1 className="text-3xl font-bold text-blue-400">Welcome to ProdHub</h1>
-                    <p className="text-gray-400">Sign in to continue</p>
-                </div>
-                <button onClick={handleGoogleSignIn} className="w-full flex items-center justify-center gap-3 py-3 px-4 bg-red-600 hover:bg-red-700 rounded-md font-semibold transition-colors">
-                    <svg className="w-6 h-6" viewBox="0 0 48 48"><path fill="#EA4335" d="M24 9.5c3.54 0 6.71 1.22 9.21 3.6l6.85-6.85C35.9 2.38 30.47 0 24 0 14.62 0 6.51 5.38 2.56 13.22l7.98 6.19C12.43 13.72 17.74 9.5 24 9.5z"></path><path fill="#4285F4" d="M46.98 24.55c0-1.57-.15-3.09-.38-4.55H24v9.02h12.94c-.58 2.96-2.26 5.48-4.78 7.18l7.73 6c4.51-4.18 7.09-10.36 7.09-17.65z"></path><path fill="#FBBC05" d="M10.53 28.59c-.48-1.45-.76-2.99-.76-4.59s.27-3.14.76-4.59l-7.98-6.19C.92 16.46 0 20.12 0 24c0 3.88.92 7.54 2.56 10.78l7.97-6.19z"></path><path fill="#34A853" d="M24 48c6.48 0 11.93-2.13 15.89-5.81l-7.73-6c-2.15 1.45-4.92 2.3-8.16 2.3-6.26 0-11.57-4.22-13.47-9.91l-7.98 6.19C6.51 42.62 14.62 48 24 48z"></path><path fill="none" d="M0 0h48v48H0z"></path></svg>
-                    Sign in with Google
-                </button>
-                <div className="relative"><div className="absolute inset-0 flex items-center"><div className="w-full border-t border-gray-600"></div></div><div className="relative flex justify-center text-sm"><span className="px-2 bg-gray-800 text-gray-500">Or continue with</span></div></div>
-                <form onSubmit={handleEmailAuth} className="space-y-4">
-                    <input type="email" placeholder="Email" value={email} onChange={e => setEmail(e.target.value)} className="w-full px-4 py-2 bg-gray-700 border border-gray-600 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                    <input type="password" placeholder="Password" value={password} onChange={e => setPassword(e.target.value)} className="w-full px-4 py-2 bg-gray-700 border border-gray-600 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                    {error && <p className="text-red-400 text-sm text-center">{error}</p>}
-                    <button type="submit" className="w-full py-2 px-4 bg-blue-600 hover:bg-blue-700 rounded-md font-semibold transition-colors">{isSigningUp ? 'Sign Up' : 'Sign In'}</button>
-                </form>
-                <p className="text-center text-sm text-gray-400">
-                    {isSigningUp ? 'Already have an account?' : "Don't have an account?"}
-                    <button onClick={() => setIsSigningUp(!isSigningUp)} className="font-medium text-blue-400 hover:underline ml-1">
-                        {isSigningUp ? 'Sign In' : 'Sign Up'}
-                    </button>
-                </p>
-            </div>
-        </div>
-    );
-}
-
-// This is the main content of your application
 function HubApp({ user, handleSignOut }) {
     const [projects, setProjects] = useState([]);
     const [tasks, setTasks] = useState([]);
@@ -143,58 +22,68 @@ function HubApp({ user, handleSignOut }) {
     const [habitEntries, setHabitEntries] = useState([]);
     const [activeView, setActiveView] = useState('dashboard');
     const [selectedProjectId, setSelectedProjectId] = useState(null);
-    
+
     const [syncedEvents, setSyncedEvents] = useState([]);
     const [tokenClient, setTokenClient] = useState(null);
     const [isGsiScriptLoaded, setIsGsiScriptLoaded] = useState(false);
 
-    // Effect to load the Google Sign-In script
     useEffect(() => {
-        const script = document.createElement('script');
-        script.src = 'https://accounts.google.com/gsi/client';
-        script.async = true;
-        script.defer = true;
-        script.onload = () => setIsGsiScriptLoaded(true);
-        document.body.appendChild(script);
-        return () => document.body.removeChild(script);
+        let cancelled = false;
+        loadGoogleIdentityScript()
+            .then(() => {
+                if (!cancelled) setIsGsiScriptLoaded(true);
+            })
+            .catch((err) => console.error('Google Identity script failed to load', err));
+        return () => {
+            cancelled = true;
+        };
     }, []);
 
-    // Effect to initialize the Google token client once the script is loaded
     useEffect(() => {
         if (isGsiScriptLoaded && window.google && GOOGLE_CLIENT_ID) {
-            const client = window.google.accounts.oauth2.initTokenClient({ client_id: GOOGLE_CLIENT_ID, scope: 'https://www.googleapis.com/auth/calendar.readonly', callback: '' });
+            const client = createCalendarTokenClient({
+                clientId: GOOGLE_CLIENT_ID,
+                onToken: () => {},
+                onError: (err) => console.error(err),
+            });
             setTokenClient(client);
         }
     }, [isGsiScriptLoaded]);
 
-    // Effect to subscribe to Firestore data
     useEffect(() => {
-        if (!user || !db) return;
+        if (!user || !db) return undefined;
         const basePath = `artifacts/${appId}/users/${user.uid}`;
 
         const projectsQuery = query(collection(db, `${basePath}/projects`));
         const unsubscribeProjects = onSnapshot(projectsQuery, (snapshot) => {
-            const projectsData = snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }));
+            const projectsData = snapshot.docs.map((d) => ({ id: d.id, ...d.data() }));
             setProjects(projectsData);
-            if (selectedProjectId && !snapshot.docs.some(doc => doc.id === selectedProjectId)) {
+            if (selectedProjectId && !snapshot.docs.some((docSnap) => docSnap.id === selectedProjectId)) {
                 setActiveView('dashboard');
                 setSelectedProjectId(null);
             }
         });
 
         const tasksQuery = query(collection(db, `${basePath}/tasks`));
-        const unsubscribeTasks = onSnapshot(tasksQuery, (snapshot) => setTasks(snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }))));
-        
+        const unsubscribeTasks = onSnapshot(tasksQuery, (snapshot) =>
+            setTasks(snapshot.docs.map((d) => ({ id: d.id, ...d.data() })))
+        );
+
         const habitsQuery = query(collection(db, `${basePath}/habits`));
-        const unsubscribeHabits = onSnapshot(habitsQuery, (snapshot) => setHabits(snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }))));
+        const unsubscribeHabits = onSnapshot(habitsQuery, (snapshot) =>
+            setHabits(snapshot.docs.map((d) => ({ id: d.id, ...d.data() })))
+        );
 
         const goalsQuery = query(collection(db, `${basePath}/goals`));
-        const unsubscribeGoals = onSnapshot(goalsQuery, (snapshot) => setGoals(snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }))));
+        const unsubscribeGoals = onSnapshot(goalsQuery, (snapshot) =>
+            setGoals(snapshot.docs.map((d) => ({ id: d.id, ...d.data() })))
+        );
 
         const habitEntriesQuery = query(collection(db, `${basePath}/habit_entries`));
-        const unsubscribeHabitEntries = onSnapshot(habitEntriesQuery, (snapshot) => setHabitEntries(snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }))));
+        const unsubscribeHabitEntries = onSnapshot(habitEntriesQuery, (snapshot) =>
+            setHabitEntries(snapshot.docs.map((d) => ({ id: d.id, ...d.data() })))
+        );
 
-        // Cleanup subscriptions on component unmount
         return () => {
             unsubscribeProjects();
             unsubscribeTasks();
@@ -202,10 +91,13 @@ function HubApp({ user, handleSignOut }) {
             unsubscribeGoals();
             unsubscribeHabitEntries();
         };
-    }, [user, selectedProjectId]); // Re-run if user changes
+    }, [user, selectedProjectId]);
+
+    const selectedProject = useMemo(
+        () => projects.find((p) => p.id === selectedProjectId),
+        [selectedProjectId, projects]
+    );
 
-    const selectedProject = useMemo(() => projects.find(p => p.id === selectedProjectId), [selectedProjectId, projects]);
-    
     const handleSetView = (view, projectId = null) => {
         setActiveView(view);
         setSelectedProjectId(projectId);
@@ -213,1296 +105,67 @@ function HubApp({ user, handleSignOut }) {
 
     return (
         <div className="bg-gray-900 text-gray-100 min-h-screen font-sans flex">
-            <Sidebar onViewChange={handleSetView} projects={projects} goals={goals} userId={user.uid} handleSignOut={handleSignOut} />
+            <Sidebar
+                onViewChange={handleSetView}
+                projects={projects}
+                goals={goals}
+                userId={user.uid}
+                handleSignOut={handleSignOut}
+            />
             <main className="flex-1 p-4 sm:p-6 lg:p-8 overflow-y-auto">
-                {activeView === 'dashboard' && <Dashboard projects={projects} tasks={tasks} goals={goals} onViewChange={handleSetView} syncedEvents={syncedEvents} />}
-                {activeView === 'project' && selectedProject && <ProjectDetail project={selectedProject} allTasks={tasks} syncedEvents={syncedEvents} />}
+                {activeView === 'dashboard' && (
+                    <Dashboard
+                        projects={projects}
+                        tasks={tasks}
+                        goals={goals}
+                        onViewChange={handleSetView}
+                        syncedEvents={syncedEvents}
+                    />
+                )}
+                {activeView === 'project' && selectedProject && (
+                    <ProjectDetail project={selectedProject} allTasks={tasks} syncedEvents={syncedEvents} />
+                )}
                 {activeView === 'all_tasks' && <AllTasksView tasks={tasks} projects={projects} />}
-                {activeView === 'schedule' && <ScheduleView projects={projects} tasks={tasks} syncedEvents={syncedEvents} setSyncedEvents={setSyncedEvents} tokenClient={tokenClient} />}
+                {activeView === 'schedule' && (
+                    <ScheduleView
+                        projects={projects}
+                        tasks={tasks}
+                        syncedEvents={syncedEvents}
+                        setSyncedEvents={setSyncedEvents}
+                        tokenClient={tokenClient}
+                    />
+                )}
                 {activeView === 'habit_tracker' && <HabitTrackerView habits={habits} entries={habitEntries} />}
-                {activeView === 'weekly_review' && <WeeklyReviewView tasks={tasks} projects={projects} habits={habits} entries={habitEntries} />}
+                {activeView === 'weekly_review' && (
+                    <WeeklyReviewView tasks={tasks} projects={projects} habits={habits} entries={habitEntries} />
+                )}
             </main>
         </div>
     );
 }
 
-// --- Top-Level App Component (Handles Conditional Logic) ---
 export default function App() {
-    const [user, setUser] = useState(null);
-    const [isAuthReady, setIsAuthReady] = useState(false);
-
-    useEffect(() => {
-        if (!auth) {
-            setIsAuthReady(true); // If firebase isn't configured, we can't check auth
-            return;
-        }
-        const unsubscribe = onAuthStateChanged(auth, (currentUser) => {
-            setUser(currentUser);
-            setIsAuthReady(true);
-        });
-        return () => unsubscribe();
-    }, []);
-
-    const handleSignOut = async () => {
-        if(auth) {
-            await signOut(auth);
-        }
-    };
+    const { user, isAuthReady, signInWithGoogle, emailSignIn, emailSignUp, signOutUser } = useAuth();
 
     if (!isFirebaseConfigured || !GOOGLE_CLIENT_ID) {
         return <ConfigurationNeeded missingFirebase={!isFirebaseConfigured} missingGoogle={!GOOGLE_CLIENT_ID} />;
     }
 
     if (!isAuthReady) {
-        return <div className="flex items-center justify-center h-screen bg-gray-900 text-white"><div className="animate-spin rounded-full h-32 w-32 border-t-2 border-b-2 border-blue-500"></div></div>;
-    }
-
-    return user ? <HubApp user={user} handleSignOut={handleSignOut} /> : <LoginScreen />;
-}
-
-// --- Components ---
-function Sidebar({ onViewChange, projects, goals, userId, handleSignOut }) {
-    const [isAddingProject, setIsAddingProject] = useState(false);
-    const [newProjectName, setNewProjectName] = useState('');
-    const [newProjectType, setNewProjectType] = useState('Course');
-    const [showGoalModal, setShowGoalModal] = useState(false);
-
-    const handleAddProject = async (e) => {
-        e.preventDefault();
-        if (!newProjectName.trim() || !userId || !db) return;
-        const project = { name: newProjectName, type: newProjectType, createdAt: new Date(), status: 'In Progress', progress: 0, goalId: null };
-        try {
-            await addDoc(collection(db, `artifacts/${appId}/users/${userId}/projects`), project);
-            setNewProjectName('');
-            setIsAddingProject(false);
-        } catch (error) {
-            console.error("Error adding project:", error);
-        }
-    };
-
-    const { standaloneProjects, goalProjects } = useMemo(() => {
-        const standalone = projects.filter(p => !p.goalId);
-        const grouped = projects.reduce((acc, project) => {
-            if (project.goalId) {
-                (acc[project.goalId] = acc[project.goalId] || []).push(project);
-            }
-            return acc;
-        }, {});
-        return { standaloneProjects: standalone, goalProjects: grouped };
-    }, [projects]);
-
-
-    return (
-        <>
-            <GoalPlannerModal isOpen={showGoalModal} onClose={() => setShowGoalModal(false)} userId={userId} />
-            <aside className="w-64 bg-gray-900/50 border-r border-gray-700/50 p-4 flex flex-col">
-                <div className="space-y-6 flex-1 overflow-y-auto">
-                    <h1 className="text-2xl font-bold text-blue-400 flex items-center gap-2"><Book size={24} /> ProdHub</h1>
-                    <nav className="space-y-2">
-                        <button onClick={() => onViewChange('dashboard')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><CheckSquare size={20} /> Dashboard</button>
-                        <button onClick={() => onViewChange('weekly_review')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><TrendingUp size={20} /> Weekly Review</button>
-                        <button onClick={() => onViewChange('habit_tracker')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><Repeat size={20} /> Habit Tracker</button>
-                        <button onClick={() => onViewChange('all_tasks')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><CheckSquare size={20} /> All Tasks</button>
-                        <button onClick={() => onViewChange('schedule')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><Calendar size={20} /> Schedule</button>
-                        
-                        <div className="pt-4">
-                            <h2 className="text-sm font-semibold text-gray-500 px-3 mb-2">Goals</h2>
-                             <button onClick={() => setShowGoalModal(true)} className="w-full flex items-center gap-3 px-3 py-2 mt-2 rounded-md text-purple-400 hover:bg-purple-900/50 transition-colors"><Sparkles size={20} /> AI Goal Planner</button>
-                            {goals.map(goal => (
-                                <GoalDropdown key={goal.id} goal={goal} projects={goalProjects[goal.id] || []} onViewChange={onViewChange} userId={userId} />
-                            ))}
-                        </div>
-
-                        <div className="pt-4">
-                            <h2 className="text-sm font-semibold text-gray-500 px-3 mb-2">Projects</h2>
-                            {standaloneProjects.map(p => (
-                                <button key={p.id} onClick={() => onViewChange('project', p.id)} className="w-full text-left flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors truncate">
-                                   <div className={`w-2 h-2 rounded-full ${p.type === 'Course' ? 'bg-green-400' : p.type === 'Seminar' ? 'bg-purple-400' : 'bg-yellow-400'}`}></div>
-                                   {p.name}
-                                </button>
-                            ))}
-                            <button onClick={() => setIsAddingProject(!isAddingProject)} className="w-full flex items-center gap-3 px-3 py-2 mt-2 rounded-md text-blue-400 hover:bg-blue-900/50 transition-colors"><Plus size={20} /> Add Project</button>
-                            {isAddingProject && (
-                                <form onSubmit={handleAddProject} className="p-3 bg-gray-800 rounded-md mt-2 space-y-2">
-                                    <input type="text" value={newProjectName} onChange={e => setNewProjectName(e.target.value)} placeholder="Project Name" className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500" />
-                                    <select value={newProjectType} onChange={e => setNewProjectType(e.target.value)} className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500">
-                                        <option>Course</option><option>Conference</option><option>Seminar</option><option>Bootcamp</option><option>Personal</option>
-                                    </select>
-                                    <button type="submit" className="w-full bg-blue-600 hover:bg-blue-700 rounded-md py-1 text-sm font-semibold">Save</button>
-                                </form>
-                            )}
-                        </div>
-                    </nav>
-                </div>
-                <button onClick={handleSignOut} className="w-full flex-shrink-0 flex items-center gap-3 px-3 py-2 rounded-md text-gray-400 hover:bg-red-900/50 hover:text-red-300 transition-colors mt-4">
-                    <LogOut size={20} /> Sign Out
-                </button>
-            </aside>
-        </>
-    );
-}
-
-function GoalDropdown({ goal, projects, onViewChange, userId }) {
-    const [isOpen, setIsOpen] = useState(true);
-    const [isEditing, setIsEditing] = useState(false);
-    const [editedName, setEditedName] = useState(goal.name);
-    const [showDeleteModal, setShowDeleteModal] = useState(false);
-
-    const handleUpdate = async (e) => {
-        e.preventDefault();
-        if (!editedName.trim()) return;
-        await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/goals`, goal.id), { name: editedName });
-        setIsEditing(false);
-    };
-
-    const handleDelete = async () => {
-        if (!userId || !db) return;
-        setShowDeleteModal(false);
-        const batch = writeBatch(db);
-
-        // Delete the goal
-        batch.delete(doc(db, `artifacts/${appId}/users/${userId}/goals`, goal.id));
-
-        // Delete all projects and tasks associated with the goal
-        for (const project of projects) {
-            batch.delete(doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id));
-            const tasksQuery = query(collection(db, `artifacts/${appId}/users/${userId}/tasks`), where("projectId", "==", project.id));
-            const tasksSnapshot = await getDocs(tasksQuery);
-            tasksSnapshot.forEach(taskDoc => batch.delete(taskDoc.ref));
-        }
-        await batch.commit();
-    };
-
-    return (
-        <div className="text-sm">
-            <ConfirmModal isOpen={showDeleteModal} onClose={() => setShowDeleteModal(false)} onConfirm={handleDelete} title="Delete Goal" message={`Are you sure you want to delete the goal "${goal.name}" and all its projects and tasks?`} />
-            <div className="flex items-center justify-between px-3 py-2 rounded-md hover:bg-gray-700/50 group">
-                {isEditing ? (
-                    <form onSubmit={handleUpdate} className="flex-grow flex items-center gap-2">
-                        <input value={editedName} onChange={(e) => setEditedName(e.target.value)} className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500" autoFocus />
-                        <button type="submit" className="p-1 text-green-400 hover:text-white"><Save size={16} /></button>
-                    </form>
-                ) : (
-                    <button onClick={() => setIsOpen(!isOpen)} className="flex items-center gap-2 flex-grow text-left">
-                        {isOpen ? <ChevronDown size={16} /> : <ChevronRight size={16} />}
-                        <span className="font-semibold text-gray-200 truncate">{goal.name}</span>
-                    </button>
-                )}
-                <div className="flex items-center opacity-0 group-hover:opacity-100 transition-opacity">
-                    <button onClick={() => setIsEditing(true)} className="p-1 text-gray-400 hover:text-white"><Edit2 size={16} /></button>
-                    <button onClick={() => setShowDeleteModal(true)} className="p-1 text-gray-400 hover:text-red-400"><Trash2 size={16} /></button>
-                </div>
-            </div>
-            {isOpen && (
-                <div className="pl-6 border-l-2 border-gray-700 ml-5 my-1">
-                    {projects.map(p => (
-                        <button key={p.id} onClick={() => onViewChange('project', p.id)} className="w-full text-left flex items-center gap-3 px-3 py-1.5 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors truncate">
-                            <div className={`w-2 h-2 rounded-full ${p.type === 'Course' ? 'bg-green-400' : p.type === 'Seminar' ? 'bg-purple-400' : 'bg-yellow-400'}`}></div>
-                            {p.name}
-                        </button>
-                    ))}
-                     {projects.length === 0 && <p className="px-3 py-1.5 text-xs text-gray-500">No projects yet.</p>}
-                </div>
-            )}
-        </div>
-    );
-}
-
-function Dashboard({ projects, tasks, goals, onViewChange, syncedEvents }) {
-    const [showPlanModal, setShowPlanModal] = useState(false);
-    const [dailyPlan, setDailyPlan] = useState('');
-    const [isPlanning, setIsPlanning] = useState(false);
-    const [planningError, setPlanningError] = useState('');
-
-    const today = new Date();
-    today.setHours(0,0,0,0);
-    const todayKey = getLocalDateKey(new Date());
-
-    const upcomingTasks = tasks.filter(t => !t.completed && t.dueDate).map(t => ({...t, dueDateObj: new Date(t.dueDate)})).filter(t => t.dueDateObj >= today).sort((a, b) => a.dueDateObj - b.dueDateObj).slice(0, 5);
-    const overdueTasks = tasks.filter(t => !t.completed && t.dueDate && new Date(t.dueDate) < today);
-
-    const { standaloneProjects, goalProjects } = useMemo(() => {
-        const standalone = projects.filter(p => !p.goalId);
-        const grouped = projects.reduce((acc, project) => {
-            if (project.goalId) {
-                (acc[project.goalId] = acc[project.goalId] || []).push(project);
-            }
-            return acc;
-        }, {});
-        return { standaloneProjects: standalone, goalProjects: grouped };
-    }, [projects]);
-
-    const handlePlanMyDay = async () => {
-        setShowPlanModal(true);
-        setIsPlanning(true);
-        setDailyPlan('');
-        setPlanningError('');
-
-        const apiKey = process.env.REACT_APP_GEMINI_API_KEY;
-        if (!apiKey) {
-            setPlanningError("Gemini API key is not configured.");
-            setIsPlanning(false);
-            return;
-        }
-
-        const todaysTasks = tasks.filter(t => !t.completed && t.dueDate === todayKey);
-        const todaysEvents = syncedEvents.filter(e => getLocalDateKey(e.date) === todayKey);
-
-        let context = `Today is ${new Date().toLocaleDateString('en-US', { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' })}.\n\n`;
-        
-        if(overdueTasks.length > 0) {
-            context += "Here are the overdue tasks that need urgent attention:\n" + overdueTasks.map(t => `- ${t.title} (Priority: ${t.priority})`).join('\n') + '\n\n';
-        }
-
-        if(todaysTasks.length > 0) {
-            context += "Here are the tasks scheduled for today:\n" + todaysTasks.map(t => `- ${t.title} (Priority: ${t.priority})`).join('\n') + '\n\n';
-        }
-
-        if(todaysEvents.length > 0) {
-            context += "Here are the fixed appointments from the calendar:\n" + todaysEvents.map(e => `- ${e.title} at ${formatTime(e.date)}`).join('\n') + '\n\n';
-        } else {
-            context += "There are no events synced from the calendar for today. You can add them from the Schedule page for a better plan.\n\n"
-        }
-
-        if (overdueTasks.length === 0 && todaysTasks.length === 0 && todaysEvents.length === 0) {
-            setDailyPlan("You have a clear schedule today! No overdue tasks, today's tasks, or calendar events. It's a great day to get ahead on a project or start planning your next steps.");
-            setIsPlanning(false);
-            return;
-        }
-
-        const prompt = `You are a productivity coach. Based on the following information, create a prioritized, motivational, and realistic schedule for the day. Group tasks logically, suggest breaks, and slot tasks around fixed appointments. Start with the most critical items.
-
-        ${context}
-        
-        Generate a step-by-step plan.`;
-
-        const payload = { contents: [{ role: "user", parts: [{ text: prompt }] }] };
-
-        try {
-            const result = await callGeminiWithRetry(payload, apiKey);
-            
-            if (result.candidates && result.candidates[0].content.parts[0].text) {
-                setDailyPlan(result.candidates[0].content.parts[0].text);
-            } else {
-                throw new Error("Received an invalid response from the AI.");
-            }
-        } catch (e) {
-            console.error("AI Daily Planner Error:", e);
-            setPlanningError(e.message || "An unexpected error occurred.");
-        } finally {
-            setIsPlanning(false);
-        }
-    };
-
-    return (
-        <>
-            <DailyPlannerModal 
-                isOpen={showPlanModal}
-                onClose={() => setShowPlanModal(false)}
-                plan={dailyPlan}
-                isLoading={isPlanning}
-                error={planningError}
-                retry={handlePlanMyDay}
-            />
-            <div className="space-y-8">
-                <div className="flex flex-wrap gap-4 justify-between items-center">
-                    <h1 className="text-4xl font-bold text-white">Dashboard</h1>
-                    <button onClick={handlePlanMyDay} disabled={isPlanning} className="flex items-center gap-2 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded-md font-semibold transition-colors disabled:bg-blue-800 disabled:cursor-not-allowed">
-                        {isPlanning ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <Sparkles size={18} />}
-                        Plan My Day
-                    </button>
-                </div>
-                {overdueTasks.length > 0 && (
-                    <div className="bg-red-900/50 border border-red-700 rounded-lg p-4">
-                        <h2 className="text-xl font-semibold text-red-300 mb-3">Overdue Tasks ({overdueTasks.length})</h2>
-                        <div className="space-y-2">{overdueTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} isCompact={true} />)}</div>
-                    </div>
-                )}
-                <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
-                    <div className="bg-gray-800/60 rounded-lg p-6 space-y-4">
-                        <h2 className="text-2xl font-semibold text-gray-200">Upcoming Deadlines</h2>
-                        {upcomingTasks.length > 0 ? <div className="space-y-3">{upcomingTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} isCompact={true} />)}</div> : <p className="text-gray-400">No upcoming deadlines. Great job!</p>}
-                    </div>
-                    <div className="bg-gray-800/60 rounded-lg p-6 space-y-4">
-                        <h2 className="text-2xl font-semibold text-gray-200">Projects Overview</h2>
-                        <div className="space-y-4">
-                            {goals.map(goal => (
-                                <GoalProgress key={goal.id} goal={goal} projects={goalProjects[goal.id] || []} onViewChange={onViewChange} />
-                            ))}
-                            {standaloneProjects.map(p => (
-                                <div key={p.id} className="cursor-pointer" onClick={() => onViewChange('project', p.id)}>
-                                    <div className="flex justify-between items-center mb-1"><span className="font-medium text-gray-300">{p.name}</span><span className="text-sm text-gray-400">{Math.round(p.progress || 0)}%</span></div>
-                                    <div className="w-full bg-gray-700 rounded-full h-2.5"><div className="bg-blue-500 h-2.5 rounded-full" style={{ width: `${p.progress || 0}%` }}></div></div>
-                                </div>
-                            ))}
-                            {projects.length === 0 && <p className="text-gray-400">No projects yet. Add one from the sidebar!</p>}
-                        </div>
-                    </div>
-                </div>
-                <DailyReminder />
-            </div>
-        </>
-    );
-}
-
-function GoalProgress({ goal, projects, onViewChange }) {
-    const [isOpen, setIsOpen] = useState(true);
-
-    const goalProgress = useMemo(() => {
-        if (!projects || projects.length === 0) return 0;
-        const totalProgress = projects.reduce((sum, p) => sum + (p.progress || 0), 0);
-        return totalProgress / projects.length;
-    }, [projects]);
-
-    return (
-        <div className="space-y-2">
-            <button onClick={() => setIsOpen(!isOpen)} className="w-full text-left">
-                <div className="flex justify-between items-center mb-1">
-                    <span className="font-semibold text-purple-300 flex items-center gap-2">
-                        {isOpen ? <ChevronDown size={16} /> : <ChevronRight size={16} />}
-                        {goal.name}
-                    </span>
-                    <span className="text-sm text-gray-400">{Math.round(goalProgress)}%</span>
-                </div>
-                <div className="w-full bg-gray-700 rounded-full h-2.5">
-                    <div className="bg-purple-500 h-2.5 rounded-full" style={{ width: `${goalProgress}%` }}></div>
-                </div>
-            </button>
-            {isOpen && (
-                <div className="pl-6 space-y-3 pt-2">
-                    {projects.map(p => (
-                        <div key={p.id} className="cursor-pointer" onClick={() => onViewChange('project', p.id)}>
-                            <div className="flex justify-between items-center mb-1 text-sm">
-                                <span className="font-medium text-gray-300">{p.name}</span>
-                                <span className="text-xs text-gray-400">{Math.round(p.progress || 0)}%</span>
-                            </div>
-                            <div className="w-full bg-gray-600 rounded-full h-2"><div className="bg-blue-500 h-2 rounded-full" style={{ width: `${p.progress || 0}%` }}></div></div>
-                        </div>
-                    ))}
-                </div>
-            )}
-        </div>
-    );
-}
-
-
-function ProjectDetail({ project, allTasks, syncedEvents }) {
-    const [isAddingTask, setIsAddingTask] = useState(false);
-    const [newTask, setNewTask] = useState({ title: '', dueDate: '', priority: 'Medium' });
-    const [editingProject, setEditingProject] = useState(null);
-    const [showDeleteModal, setShowDeleteModal] = useState(null);
-    const [isGenerating, setIsGenerating] = useState(false);
-    const [geminiError, setGeminiError] = useState('');
-    const [showAiContextModal, setShowAiContextModal] = useState(false);
-
-    const userId = auth.currentUser?.uid;
-    const tasks = useMemo(() => allTasks.filter(t => t.projectId === project.id), [allTasks, project.id]);
-
-    // Effect to update project progress when tasks change
-    useEffect(() => {
-        if (!userId || !project || !db) return;
-        const completedTasks = tasks.filter(t => t.completed).length;
-        const totalTasks = tasks.length;
-        const progress = totalTasks > 0 ? (completedTasks / totalTasks) * 100 : 0;
-        if (project.progress !== progress) {
-            const projectRef = doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id);
-            updateDoc(projectRef, { progress });
-        }
-    }, [tasks, project, userId]);
-    
-    const handleAddTask = async (e) => {
-        e.preventDefault();
-        if (!newTask.title.trim() || !userId || !db) return;
-        const task = { ...newTask, projectId: project.id, completed: false, createdAt: new Date() };
-        await addDoc(collection(db, `artifacts/${appId}/users/${userId}/tasks`), task);
-        setNewTask({ title: '', dueDate: '', priority: 'Medium' });
-        setIsAddingTask(false);
-    };
-
-    const handleUpdateProject = async (e) => {
-        e.preventDefault();
-        if (!editingProject.name.trim() || !userId || !db) return;
-        await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id), { name: editingProject.name, type: editingProject.type });
-        setEditingProject(null);
-    };
-    
-    const handleDeleteProject = async () => {
-        if (!userId || !db) return;
-        setShowDeleteModal(null);
-        // Batch delete tasks for efficiency (optional but good practice)
-        for (const task of tasks) {
-            await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id));
-        }
-        await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id));
-    };
-
-    const handleGenerateTasks = async (customContext) => {
-        setShowAiContextModal(false);
-        const apiKey = process.env.REACT_APP_GEMINI_API_KEY;
-        if (!apiKey) {
-            setGeminiError("Gemini API key is not configured. Please add REACT_APP_GEMINI_API_KEY to your .env.local file.");
-            return;
-        }
-        if (!userId || !db) return;
-        setIsGenerating(true);
-        setGeminiError('');
-
-        const projectKeywords = project.name.toLowerCase().split(' ').filter(k => k.length > 2);
-        const relevantEvents = syncedEvents.filter(event => {
-            const eventTitle = event.title.toLowerCase();
-            return projectKeywords.some(keyword => eventTitle.includes(keyword));
-        });
-
-        let calendarContext = "";
-        if (relevantEvents.length > 0) {
-            const eventList = relevantEvents.map(e => `- "${e.title}" on ${formatDate(e.date)}`).join('\n');
-            calendarContext = `For background context, here are some of my upcoming, related events from my Google Calendar:\n${eventList}\n\n`;
-        }
-        
-        const userContext = customContext ? `Your main instruction is: "${customContext}"\n\n` : "";
-
-        const prompt = `You are a project planning assistant. Your primary goal is to generate a list of actionable to-do items based on the user's main instruction. Use the other information as background context.
-        
-        **Main Instruction from User:**
-        ${userContext || "Break down the project into actionable steps."}
-
-        **Background Context:**
-        - Project Name: "${project.name}"
-        - Project Type: "${project.type}"
-        ${calendarContext}
-        
-        Based on the user's main instruction and the background context, generate a list of 5 to 7 to-do items. For each item, provide a title and estimate its difficulty as 'High', 'Medium', or 'Low'. Do not create tasks that are identical to the calendar events, but rather tasks that lead up to them.`;
-        
-        const payload = { contents: [{ role: "user", parts: [{ text: prompt }] }], generationConfig: { responseMimeType: "application/json", responseSchema: { type: "OBJECT", properties: { tasks: { type: "ARRAY", items: { type: "OBJECT", properties: { title: { type: "STRING" }, priority: { type: "STRING", enum: ["High", "Medium", "Low"] } }, required: ["title", "priority"] } } }, required: ["tasks"] } } };
-        try {
-            const result = await callGeminiWithRetry(payload, apiKey);
-            if (result.candidates && result.candidates[0].content.parts[0].text) {
-                const generated = JSON.parse(result.candidates[0].content.parts[0].text);
-                if (generated.tasks && generated.tasks.length > 0) {
-                    for (const task of generated.tasks) {
-                        await addDoc(collection(db, `artifacts/${appId}/users/${userId}/tasks`), { title: task.title, priority: task.priority, projectId: project.id, completed: false, createdAt: new Date(), dueDate: '' });
-                    }
-                }
-            } else { throw new Error("No tasks were generated."); }
-        } catch (error) {
-            console.error("Gemini API error:", error);
-            setGeminiError(error.message || "An error occurred.");
-        } finally {
-            setIsGenerating(false);
-        }
-    };
-
-    return (
-        <div className="space-y-6">
-            <AiContextModal isOpen={showAiContextModal} onClose={() => setShowAiContextModal(false)} onConfirm={handleGenerateTasks} />
-            <ConfirmModal isOpen={showDeleteModal === 'project'} onClose={() => setShowDeleteModal(null)} onConfirm={handleDeleteProject} title="Delete Project" message={`Are you sure you want to delete "${project.name}" and all its tasks?`} />
-            {editingProject ? (
-                <form onSubmit={handleUpdateProject} className="flex items-center gap-4 bg-gray-800 p-4 rounded-lg">
-                    <input type="text" value={editingProject.name} onChange={e => setEditingProject({...editingProject, name: e.target.value})} className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-3 py-2 text-2xl font-bold focus:outline-none focus:ring-2 focus:ring-blue-500" />
-                    <select value={editingProject.type} onChange={e => setEditingProject({...editingProject, type: e.target.value})} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"><option>Course</option><option>Conference</option><option>Seminar</option><option>Bootcamp</option><option>Personal</option></select>
-                    <button type="submit" className="p-2 bg-green-600 hover:bg-green-700 rounded-md"><Save size={20} /></button>
-                    <button onClick={() => setEditingProject(null)} className="p-2 bg-gray-600 hover:bg-gray-700 rounded-md"><X size={20} /></button>
-                </form>
-            ) : (
-                <div className="flex items-center justify-between">
-                    <div className="flex items-center gap-4"><h1 className="text-4xl font-bold text-white">{project.name}</h1><span className="text-sm font-medium bg-blue-900/70 text-blue-300 px-3 py-1 rounded-full">{project.type}</span></div>
-                    <div className="flex items-center gap-2">
-                        <button onClick={() => setEditingProject({...project})} className="p-2 text-gray-400 hover:text-white hover:bg-gray-700 rounded-md"><Edit2 size={20} /></button>
-                        <button onClick={() => setShowDeleteModal('project')} className="p-2 text-gray-400 hover:text-red-500 hover:bg-gray-700 rounded-md"><Trash2 size={20} /></button>
-                    </div>
-                </div>
-            )}
-            <div>
-                <div className="flex justify-between items-center mb-1"><span className="text-sm font-medium text-gray-400">Progress</span><span className="text-sm font-medium text-white">{Math.round(project.progress || 0)}%</span></div>
-                <div className="w-full bg-gray-700 rounded-full h-2.5"><div className="bg-blue-500 h-2.5 rounded-full transition-all duration-500" style={{ width: `${project.progress || 0}%` }}></div></div>
-            </div>
-            <div className="bg-gray-800/60 rounded-lg p-6">
-                <div className="flex flex-wrap gap-4 justify-between items-center mb-4">
-                    <h2 className="text-2xl font-semibold">To-Do List</h2>
-                    <div className="flex gap-2">
-                        <button onClick={() => setShowAiContextModal(true)} disabled={isGenerating} className="flex items-center gap-2 bg-purple-600 hover:bg-purple-700 px-4 py-2 rounded-md font-semibold transition-colors disabled:bg-purple-800 disabled:cursor-not-allowed">
-                            {isGenerating ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <Sparkles size={18} />}
-                            {isGenerating ? 'Generating...' : '✨ Generate Tasks'}
-                        </button>
-                        <button onClick={() => setIsAddingTask(!isAddingTask)} className="flex items-center gap-2 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded-md font-semibold transition-colors"><Plus size={18} /> {isAddingTask ? 'Cancel' : 'Add Task'}</button>
-                    </div>
-                </div>
-                {geminiError && <div className="text-red-400 bg-red-900/50 p-3 rounded-md mb-4 text-sm">{geminiError}</div>}
-                {isAddingTask && (
-                    <form onSubmit={handleAddTask} className="grid grid-cols-1 md:grid-cols-3 gap-4 mb-6 p-4 bg-gray-900/50 rounded-md">
-                        <input type="text" value={newTask.title} onChange={e => setNewTask({...newTask, title: e.target.value})} placeholder="Task title..." className="md:col-span-2 bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                        <div className="grid grid-cols-2 gap-2">
-                           <input type="date" value={newTask.dueDate} onChange={e => setNewTask({...newTask, dueDate: e.target.value})} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500" />
-                           <select value={newTask.priority} onChange={e => setNewTask({...newTask, priority: e.target.value})} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"><option>High</option><option>Medium</option><option>Low</option></select>
-                        </div>
-                        <button type="submit" className="md:col-span-3 w-full bg-green-600 hover:bg-green-700 rounded-md py-2 font-semibold">Save Task</button>
-                    </form>
-                )}
-                <div className="space-y-3">
-                    {tasks.length > 0 ? tasks.sort((a,b) => a.completed - b.completed).map(task => <TaskItem key={task.id} task={task} />) : <p className="text-gray-400 text-center py-4">No tasks for this project yet. Try generating some with AI!</p>}
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function AllTasksView({ tasks, projects }) {
-    const [filter, setFilter] = useState('All');
-    const [sortBy, setSortBy] = useState('dueDate');
-    const filteredAndSortedTasks = useMemo(() => {
-        let filtered = tasks;
-        if (filter === 'Active') filtered = tasks.filter(t => !t.completed);
-        if (filter === 'Completed') filtered = tasks.filter(t => t.completed);
-        return [...filtered].sort((a, b) => {
-            if (sortBy === 'dueDate') return (a.dueDate ? new Date(a.dueDate) : new Date('2999-12-31')) - (b.dueDate ? new Date(b.dueDate) : new Date('2999-12-31'));
-            if (sortBy === 'priority') { const priorityOrder = { 'High': 1, 'Medium': 2, 'Low': 3 }; return priorityOrder[a.priority] - priorityOrder[b.priority]; }
-            if (sortBy === 'project') { const projectA = projects.find(p => p.id === a.projectId)?.name || ''; const projectB = projects.find(p => p.id === b.projectId)?.name || ''; return projectA.localeCompare(projectB); }
-            return 0;
-        });
-    }, [tasks, projects, filter, sortBy]);
-    return (
-        <div className="space-y-6">
-            <h1 className="text-4xl font-bold text-white">All Tasks</h1>
-            <div className="flex flex-wrap gap-4 items-center p-4 bg-gray-800/60 rounded-lg">
-                <div><span className="text-sm font-medium text-gray-400 mr-2">Filter by:</span><select onChange={(e) => setFilter(e.target.value)} value={filter} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-1.5 focus:outline-none focus:ring-2 focus:ring-blue-500"><option>All</option><option>Active</option><option>Completed</option></select></div>
-                <div><span className="text-sm font-medium text-gray-400 mr-2">Sort by:</span><select onChange={(e) => setSortBy(e.target.value)} value={sortBy} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-1.5 focus:outline-none focus:ring-2 focus:ring-blue-500"><option value="dueDate">Due Date</option><option value="priority">Priority</option><option value="project">Project</option></select></div>
-            </div>
-            <div className="space-y-3">{filteredAndSortedTasks.length > 0 ? filteredAndSortedTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} />) : <p className="text-gray-400 text-center py-8">No tasks found.</p>}</div>
-        </div>
-    );
-}
-
-function ScheduleView({ projects, tasks, syncedEvents, setSyncedEvents, tokenClient }) {
-    const [isLoading, setIsLoading] = useState(false);
-    const [error, setError] = useState(null);
-
-    const handleSync = () => {
-        if (tokenClient) {
-            tokenClient.callback = async (tokenResponse) => {
-                if (tokenResponse && tokenResponse.access_token) {
-                    setIsLoading(true);
-                    setError(null);
-                    try {
-                        const startTime = new Date().toISOString();
-                        const response = await fetch(`https://www.googleapis.com/calendar/v3/calendars/primary/events?timeMin=${startTime}&singleEvents=true&orderBy=startTime`, {
-                            headers: { 'Authorization': `Bearer ${tokenResponse.access_token}` },
-                        });
-                        if (!response.ok) throw new Error('Failed to fetch calendar events.');
-                        const data = await response.json();
-                        const formattedEvents = data.items
-                            .filter(item => !(item.summary && item.summary.toLowerCase().includes('birthday')))
-                            .map(item => ({
-                                id: `gcal-${item.id}`,
-                                title: item.summary,
-                                date: item.start.dateTime ? new Date(item.start.dateTime) : new Date(item.start.date),
-                                type: 'Google Calendar',
-                                color: 'bg-red-500'
-                            }));
-                        setSyncedEvents(formattedEvents);
-                    } catch (e) {
-                        setError('Could not fetch events. Please try again.');
-                        console.error(e);
-                    } finally {
-                        setIsLoading(false);
-                    }
-                }
-            };
-            tokenClient.requestAccessToken();
-        } else {
-            setError("Google Auth is not ready. Please wait a moment and try again.");
-        }
-    };
-    
-    const allEvents = useMemo(() => {
-        const today = new Date();
-        today.setHours(0, 0, 0, 0); // Set to start of today for accurate overdue comparison
-
-        const projectEvents = projects.map(p => ({
-            id: `proj-${p.id}`,
-            title: p.name,
-            date: p.deadline ? new Date(p.deadline) : null,
-            type: 'Project Deadline',
-            color: 'bg-purple-500'
-        }));
-
-        const taskEvents = tasks
-            .filter(t => !t.completed) // 1. Filter out completed tasks
-            .map(t => {
-                const dueDate = t.dueDate ? new Date(t.dueDate) : null;
-                const isOverdue = dueDate && dueDate < today; // 2. Check if task is overdue
-                return {
-                    id: `task-${t.id}`,
-                    title: t.title,
-                    date: dueDate,
-                    type: 'Task Deadline',
-                    color: isOverdue ? 'bg-red-700' : 'bg-green-500', // 3. Assign color based on overdue status
-                    isOverdue: isOverdue
-                };
-            });
-
-        return [...projectEvents, ...taskEvents, ...syncedEvents]
-            .filter(e => e.date && !isNaN(e.date))
-            .sort((a, b) => a.date - b.date);
-    }, [projects, tasks, syncedEvents]);
-
-    return (
-        <div className="space-y-6">
-            <div className="flex justify-between items-center">
-                <h1 className="text-4xl font-bold text-white">Schedule</h1>
-                <button onClick={handleSync} disabled={isLoading || !tokenClient} className="flex items-center gap-2 bg-red-600 hover:bg-red-700 px-4 py-2 rounded-md font-semibold transition-colors disabled:bg-red-800 disabled:cursor-not-allowed">
-                    {isLoading ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M8 2v4"/><path d="M16 2v4"/><rect width="18" height="18" x="3" y="4" rx="2"/><path d="M3 10h18"/></svg>}
-                    {isLoading ? 'Syncing...' : (syncedEvents.length > 0 ? 'Refresh Calendar' : 'Sync with Google Calendar')}
-                </button>
-            </div>
-            {error && <div className="text-red-400 bg-red-900/50 p-3 rounded-md text-sm">{error}</div>}
-            <div className="bg-gray-800/60 rounded-lg p-6">
-                <h2 className="text-2xl font-semibold mb-4">Upcoming Deadlines & Events</h2>
-                <div className="space-y-4">
-                    {allEvents.length > 0 ? allEvents.map(event => (
-                        <div key={event.id} className="flex items-center gap-4 p-3 bg-gray-900/50 rounded-md">
-                            <div className="flex flex-col items-center justify-center w-20 text-center">
-                                <span className="text-sm text-gray-400">{event.date.toLocaleString('default', { month: 'short' })}</span>
-                                <span className="text-2xl font-bold">{event.date.getDate()}</span>
-                            </div>
-                            <div className={`w-1.5 h-12 rounded-full ${event.color}`}></div>
-                            <div>
-                                <p className="font-semibold text-gray-200">{event.title}</p>
-                                <p className="text-sm text-gray-400">
-                                    {event.type}
-                                    {event.isOverdue && <span className="font-semibold text-red-400"> (Overdue)</span>}
-                                    {event.type === 'Google Calendar' && ` at ${formatTime(event.date)}`}
-                                </p>
-                            </div>
-                        </div>
-                    )) : <p className="text-gray-400">No scheduled events with deadlines.</p>}
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function TaskItem({ task, projects = [], isCompact = false }) {
-    const [isEditing, setIsEditing] = useState(false);
-    const [editTitle, setEditTitle] = useState(task.title);
-    const [editPriority, setEditPriority] = useState(task.priority || 'Medium');
-    const [showDeleteModal, setShowDeleteModal] = useState(false);
-    const userId = auth.currentUser?.uid;
-
-    const handleToggleComplete = async () => {
-        if (!userId || !db) return;
-        await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id), { completed: !task.completed, completedAt: !task.completed ? new Date() : null });
-    };
-
-    const handleUpdate = async (e) => {
-        e.preventDefault();
-        if (!userId || !editTitle.trim() || !db) return;
-        await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id), { 
-            title: editTitle,
-            priority: editPriority
-        });
-        setIsEditing(false);
-    };
-
-    const handleDelete = async () => {
-        if (!userId || !db) return;
-        await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id));
-        setShowDeleteModal(false);
-    };
-
-    const projectName = projects.find(p => p.id === task.projectId)?.name;
-    const priorityColor = { High: 'text-red-400', Medium: 'text-yellow-400', Low: 'text-green-400' };
-
-    if (isCompact) {
         return (
-             <div className="flex items-center justify-between text-sm p-2 rounded-md bg-gray-900/30 hover:bg-gray-900/50">
-                <span className={`truncate ${task.completed ? 'line-through text-gray-500' : ''}`}>{task.title}</span>
-                <div className="flex items-center gap-2 text-gray-400">
-                    {task.dueDate && <span>{formatDate(new Date(task.dueDate))}</span>}
-                    {projectName && <span className="text-xs bg-gray-700 px-2 py-0.5 rounded">{projectName}</span>}
-                </div>
+            <div className="flex items-center justify-center h-screen bg-gray-900 text-white">
+                <div className="animate-spin rounded-full h-32 w-32 border-t-2 border-b-2 border-blue-500"></div>
             </div>
         );
     }
 
-    return (
-        <>
-            <ConfirmModal isOpen={showDeleteModal} onClose={() => setShowDeleteModal(false)} onConfirm={handleDelete} title="Delete Task" message={`Are you sure you want to delete this task: "${task.title}"?`} />
-            <div className={`p-3 rounded-md transition-colors flex items-start gap-3 ${task.completed ? 'bg-gray-800/50' : 'bg-gray-900/50'}`}>
-                <button onClick={handleToggleComplete} className="mt-1">
-                    <div className={`w-5 h-5 rounded border-2 flex items-center justify-center ${task.completed ? 'bg-blue-500 border-blue-500' : 'border-gray-500'}`}>
-                        {task.completed && <CheckSquare size={16} className="text-white" />}
-                    </div>
-                </button>
-                <div className="flex-grow">
-                    {isEditing ? (
-                        <form onSubmit={handleUpdate} className="flex gap-2 items-center">
-                            <input type="text" value={editTitle} onChange={e => setEditTitle(e.target.value)} className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500" autoFocus />
-                            <select value={editPriority} onChange={e => setEditPriority(e.target.value)} className="bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500">
-                                <option>High</option><option>Medium</option><option>Low</option>
-                            </select>
-                            <button type="submit" className="p-1.5 bg-green-600 hover:bg-green-700 rounded-md"><Save size={16} /></button>
-                        </form>
-                    ) : (
-                        <p className={`text-gray-200 ${task.completed ? 'line-through text-gray-500' : ''}`}>{task.title}</p>
-                    )}
-                    <div className="flex items-center gap-4 text-xs text-gray-400 mt-1">
-                        {task.dueDate && <div className="flex items-center gap-1"><Calendar size={12} /> {formatDate(new Date(task.dueDate))}</div>}
-                        {task.priority && <div className={`flex items-center gap-1 font-semibold ${priorityColor[task.priority]}`}><Tag size={12} /> {task.priority}</div>}
-                        {projectName && <div className="flex items-center gap-1"><Book size={12} /> {projectName}</div>}
-                    </div>
-                </div>
-                <div className="flex items-center gap-1">
-                    <button onClick={() => setIsEditing(!isEditing)} className="p-1.5 text-gray-400 hover:text-white hover:bg-gray-700 rounded-md"><Edit2 size={16} /></button>
-                    <button onClick={() => setShowDeleteModal(true)} className="p-1.5 text-gray-400 hover:text-red-500 hover:bg-gray-700 rounded-md"><Trash2 size={16} /></button>
-                </div>
-            </div>
-        </>
-    );
-}
-
-function HabitTrackerView({ habits, entries }) {
-    const [newHabitName, setNewHabitName] = useState('');
-    const [isAdding, setIsAdding] = useState(false);
-    const [showAnalytics, setShowAnalytics] = useState(false);
-    const userId = auth.currentUser?.uid;
-
-    const handleAddHabit = async (e) => {
-        e.preventDefault();
-        if (!newHabitName.trim() || !userId || !db) return;
-        await addDoc(collection(db, `artifacts/${appId}/users/${userId}/habits`), { name: newHabitName, createdAt: new Date() });
-        setNewHabitName('');
-        setIsAdding(false);
-    };
-    
-    const habitStreaks = useMemo(() => {
-        const streaks = {};
-        habits.forEach(habit => {
-            const habitEntries = entries
-                .filter(e => e.habitId === habit.id && e.completed)
-                .map(e => e.date)
-                .sort((a, b) => new Date(b) - new Date(a));
-            
-            let currentStreak = 0;
-            if (habitEntries.length > 0) {
-                const today = new Date();
-                const todayKey = getLocalDateKey(today);
-                const yesterday = new Date(today);
-                yesterday.setDate(yesterday.getDate() - 1);
-                const yesterdayKey = getLocalDateKey(yesterday);
-
-                if (habitEntries[0] === todayKey || habitEntries[0] === yesterdayKey) {
-                    currentStreak = 1;
-                    for (let i = 0; i < habitEntries.length - 1; i++) {
-                        const current = new Date(habitEntries[i]);
-                        const next = new Date(habitEntries[i+1]);
-                        const diffDays = Math.round((current - next) / (1000 * 60 * 60 * 24));
-                        if (diffDays === 1) {
-                            currentStreak++;
-                        } else {
-                            break;
-                        }
-                    }
-                }
-            }
-            streaks[habit.id] = currentStreak;
-        });
-        return streaks;
-    }, [habits, entries]);
-
-    return (
-        <div className="space-y-6">
-            <div className="flex justify-between items-center">
-                <h1 className="text-4xl font-bold text-white">Habit Tracker</h1>
-                <div className="flex gap-2">
-                    <button onClick={() => setShowAnalytics(!showAnalytics)} className="flex items-center gap-2 bg-indigo-600 hover:bg-indigo-700 px-4 py-2 rounded-md font-semibold transition-colors">
-                        <TrendingUp size={18} /> {showAnalytics ? 'Hide Analytics' : 'Show Analytics'}
-                    </button>
-                    <button onClick={() => setIsAdding(!isAdding)} className="flex items-center gap-2 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded-md font-semibold transition-colors">
-                        <Plus size={18} /> {isAdding ? 'Cancel' : 'New Habit'}
-                    </button>
-                </div>
-            </div>
-
-            {isAdding && (
-                <form onSubmit={handleAddHabit} className="flex gap-2 p-4 bg-gray-800 rounded-lg">
-                    <input type="text" value={newHabitName} onChange={e => setNewHabitName(e.target.value)} placeholder="e.g., Read for 30 minutes" className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                    <button type="submit" className="bg-green-600 hover:bg-green-700 px-4 py-2 rounded-md font-semibold">Save</button>
-                </form>
-            )}
-
-            {showAnalytics && (
-                <div className="bg-gray-800/60 rounded-lg p-6">
-                    <h2 className="text-2xl font-semibold mb-4">Habit Analytics</h2>
-                    <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
-                       {habits.map(habit => <HabitCalendar key={habit.id} habit={habit} entries={entries.filter(e => e.habitId === habit.id)} />)}
-                       {habits.length === 0 && <p className="text-gray-400 md:col-span-3 text-center">No habits to analyze yet.</p>}
-                    </div>
-                </div>
-            )}
-
-            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
-                {habits.length === 0 && !isAdding && (<p className="text-gray-400 md:col-span-3 text-center py-8">No habits defined yet. Add your first one!</p>)}
-                {habits.map(habit => (<HabitDayCard key={habit.id} habit={habit} entries={entries.filter(e => e.habitId === habit.id)} streak={habitStreaks[habit.id] || 0} />))}
-            </div>
-        </div>
-    );
-}
-
-function HabitDayCard({ habit, entries, streak }) {
-    const [isEditing, setIsEditing] = useState(false);
-    const [editedName, setEditedName] = useState(habit.name);
-    const [showDeleteModal, setShowDeleteModal] = useState(false);
-    const userId = auth.currentUser?.uid;
-    const todayKey = getLocalDateKey(new Date());
-    const entry = entries.find(e => e.date === todayKey);
-    const isCompleted = entry ? entry.completed : false;
-
-    const handleHabitToggle = async () => {
-        if (!userId || !db) return;
-        if (entry) {
-            await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/habit_entries`, entry.id), { completed: !isCompleted });
-        } else {
-            await addDoc(collection(db, `artifacts/${appId}/users/${userId}/habit_entries`), { habitId: habit.id, date: todayKey, completed: true });
-        }
-    };
-
-    const handleUpdateHabit = async (e) => {
-        e.preventDefault();
-        if (!editedName.trim() || !userId || !db) return;
-        const habitRef = doc(db, `artifacts/${appId}/users/${userId}/habits`, habit.id);
-        try {
-            await updateDoc(habitRef, { name: editedName });
-            setIsEditing(false);
-        } catch (error) {
-            console.error("Error updating habit:", error);
-        }
-    };
-
-    const handleDeleteHabit = async () => {
-        if (!userId || !db) return;
-        setShowDeleteModal(false);
-        
-        const entriesPath = `artifacts/${appId}/users/${userId}/habit_entries`;
-        const q = query(collection(db, entriesPath), where("habitId", "==", habit.id));
-        
-        try {
-            const querySnapshot = await getDocs(q);
-            const batch = writeBatch(db);
-            querySnapshot.forEach((doc) => {
-                batch.delete(doc.ref);
-            });
-            await batch.commit();
-
-            const habitRef = doc(db, `artifacts/${appId}/users/${userId}/habits`, habit.id);
-            await deleteDoc(habitRef);
-        } catch (error) {
-            console.error("Error deleting habit and its entries:", error);
-        }
-    };
-
-    return (
-        <>
-            <ConfirmModal 
-                isOpen={showDeleteModal} 
-                onClose={() => setShowDeleteModal(false)} 
-                onConfirm={handleDeleteHabit} 
-                title="Delete Habit" 
-                message={`Are you sure you want to delete the habit "${habit.name}"? All its tracked history will also be removed.`} 
-            />
-            <div className="bg-gray-800/60 rounded-lg p-4 flex flex-col justify-between min-h-[160px]">
-                {isEditing ? (
-                    <form onSubmit={handleUpdateHabit} className="flex-grow flex flex-col space-y-2">
-                        <input 
-                            type="text" 
-                            value={editedName} 
-                            onChange={e => setEditedName(e.target.value)}
-                            className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500"
-                            autoFocus
-                        />
-                        <div className="flex gap-2 mt-auto">
-                            <button type="submit" className="flex-1 p-1.5 text-sm bg-green-600 hover:bg-green-700 rounded-md font-semibold">Save</button>
-                            <button type="button" onClick={() => setIsEditing(false)} className="flex-1 p-1.5 text-sm bg-gray-600 hover:bg-gray-700 rounded-md font-semibold">Cancel</button>
-                        </div>
-                    </form>
-                ) : (
-                    <div className="flex-grow flex flex-col">
-                        <div className="flex justify-between items-start">
-                            <span className="font-semibold text-white pr-2">{habit.name}</span>
-                            <div className="flex items-center gap-1 flex-shrink-0">
-                                <button onClick={() => setIsEditing(true)} className="p-1 text-gray-400 hover:text-white rounded-md hover:bg-gray-700"><Edit2 size={16} /></button>
-                                <button onClick={() => setShowDeleteModal(true)} className="p-1 text-gray-400 hover:text-red-400 rounded-md hover:bg-gray-700"><Trash2 size={16} /></button>
-                            </div>
-                        </div>
-                        <div className={`flex items-center gap-1 text-sm mt-2 ${streak > 0 ? 'text-orange-400' : 'text-gray-500'}`}>
-                            <Flame size={16} />
-                            <span>{streak} day streak</span>
-                        </div>
-                    </div>
-                )}
-                
-                <button 
-                    onClick={handleHabitToggle} 
-                    disabled={isEditing}
-                    className={`w-full mt-4 py-2 rounded-md font-semibold transition-colors ${isCompleted ? 'bg-green-600 hover:bg-green-700 text-white' : 'bg-gray-700 hover:bg-gray-600 text-gray-300'} disabled:bg-gray-800 disabled:cursor-not-allowed`}
-                >
-                    {isCompleted ? "Completed Today!" : "Mark as Done"}
-                </button>
-            </div>
-        </>
-    );
-}
-
-function HabitCalendar({ habit, entries }) {
-    const today = new Date();
-    const [date, setDate] = useState(new Date(today.getFullYear(), today.getMonth(), 1));
-
-    const goToPreviousMonth = () => {
-        setDate(currentDate => new Date(currentDate.getFullYear(), currentDate.getMonth() - 1, 1));
-    };
-
-    const goToNextMonth = () => {
-        setDate(currentDate => new Date(currentDate.getFullYear(), currentDate.getMonth() + 1, 1));
-    };
-
-    const completedDates = useMemo(() => new Set(entries.filter(e => e.completed).map(e => e.date)), [entries]);
-
-    const daysInMonth = new Date(date.getFullYear(), date.getMonth() + 1, 0).getDate();
-    const firstDayOfMonth = new Date(date.getFullYear(), date.getMonth(), 1).getDay();
-    const days = Array.from({ length: daysInMonth }, (_, i) => i + 1);
-    const blanks = Array.from({ length: firstDayOfMonth }, (_, i) => i);
-
-    return (
-        <div className="bg-gray-900/50 p-4 rounded-lg">
-            <div className="flex justify-between items-center mb-2">
-                 <button onClick={goToPreviousMonth} className="p-1 rounded-md hover:bg-gray-700">&lt;</button>
-                 <h3 className="font-semibold text-center text-sm">
-                    {habit.name} - {date.toLocaleString('default', { month: 'long' })} {date.getFullYear()}
-                 </h3>
-                 <button onClick={goToNextMonth} className="p-1 rounded-md hover:bg-gray-700">&gt;</button>
-            </div>
-            <div className="grid grid-cols-7 gap-1 text-center text-xs text-gray-400">
-                {['S', 'M', 'T', 'W', 'T', 'F', 'S'].map((d, i) => <div key={i}>{d}</div>)}
-            </div>
-            <div className="grid grid-cols-7 gap-1 mt-2">
-                {blanks.map((b, i) => <div key={`b-${i}`}></div>)}
-                {days.map(d => {
-                    const dateKey = getLocalDateKey(new Date(date.getFullYear(), date.getMonth(), d));
-                    const isCompleted = completedDates.has(dateKey);
-                    const isToday = dateKey === getLocalDateKey(new Date());
-                    return (
-                        <div key={d} className={`w-full aspect-square flex items-center justify-center rounded-full text-xs ${isCompleted ? 'bg-green-500 text-white' : 'bg-gray-700'} ${isToday ? 'ring-2 ring-blue-500' : ''}`}>
-                            {d}
-                        </div>
-                    );
-                })}
-            </div>
-        </div>
-    );
-}
-
-function WeeklyReviewView({ tasks, projects, habits, entries }) {
-    const lastWeek = useMemo(() => {
-        const end = new Date();
-        const start = new Date();
-        start.setDate(start.getDate() - 7);
-        return { start, end };
-    }, []);
-
-    const completedTasks = tasks.filter(t => t.completed && t.completedAt && t.completedAt.toDate() >= lastWeek.start);
-    
-    const habitConsistency = useMemo(() => {
-        if (habits.length === 0) return 0;
-        const last7Days = Array.from({length: 7}, (_, i) => {
-            const d = new Date();
-            d.setDate(d.getDate() - i);
-            return getLocalDateKey(d);
-        });
-        
-        let totalPossible = habits.length * 7;
-        let totalCompleted = 0;
-        
-        last7Days.forEach(dateKey => {
-            habits.forEach(habit => {
-                if (entries.some(e => e.habitId === habit.id && e.date === dateKey && e.completed)) {
-                    totalCompleted++;
-                }
-            });
-        });
-        return totalPossible > 0 ? Math.round((totalCompleted / totalPossible) * 100) : 0;
-    }, [habits, entries]);
-
-    return (
-        <div className="space-y-8">
-            <h1 className="text-4xl font-bold text-white">Weekly Review</h1>
-            <p className="text-gray-400">Summary of your activity from {formatDate(lastWeek.start)} to {formatDate(lastWeek.end)}.</p>
-            
-            <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
-                <div className="bg-gray-800/60 p-6 rounded-lg text-center">
-                    <p className="text-gray-400 text-sm">Tasks Completed</p>
-                    <p className="text-5xl font-bold text-green-400">{completedTasks.length}</p>
-                </div>
-                 <div className="bg-gray-800/60 p-6 rounded-lg text-center">
-                    <p className="text-gray-400 text-sm">Habit Consistency</p>
-                    <p className="text-5xl font-bold text-orange-400">{habitConsistency}%</p>
-                </div>
-            </div>
-
-            <div className="bg-gray-800/60 p-6 rounded-lg">
-                <h2 className="text-2xl font-semibold mb-4">Completed Tasks This Week</h2>
-                {completedTasks.length > 0 ? (
-                    <div className="space-y-2">
-                        {completedTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} isCompact />)}
-                    </div>
-                ) : <p className="text-gray-400">No tasks completed this week. Let's get to it!</p>}
-            </div>
-        </div>
-    );
-}
-
-function DailyReminder() {
-    const [showReminder, setShowReminder] = useState(true);
-    if (!showReminder) return null;
-    return (
-        <div className="bg-blue-900/50 border border-blue-700 rounded-lg p-4 flex items-start gap-4">
-            <Clock size={24} className="text-blue-300 mt-1 flex-shrink-0" />
-            <div className="flex-grow">
-                <h3 className="font-semibold text-blue-200">Daily Reminder</h3>
-                <p className="text-sm text-blue-300">Don't forget to review your goals for the day and plan your tasks. A little planning goes a long way!</p>
-            </div>
-            <button onClick={() => setShowReminder(false)} className="p-1 text-blue-300 hover:text-white"><X size={20} /></button>
-        </div>
-    );
-}
-
-function ConfirmModal({ isOpen, onClose, onConfirm, title, message }) {
-    if (!isOpen) return null;
-    return (
-        <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50">
-            <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-md mx-4">
-                <h2 className="text-2xl font-bold text-white mb-4">{title}</h2>
-                <p className="text-gray-300 mb-6">{message}</p>
-                <div className="flex justify-end gap-4">
-                    <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">Cancel</button>
-                    <button onClick={onConfirm} className="px-4 py-2 rounded-md bg-red-600 hover:bg-red-700 font-semibold text-white transition-colors">Confirm</button>
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function AiContextModal({ isOpen, onClose, onConfirm }) {
-    const [context, setContext] = useState('');
-
-    const handleConfirm = () => {
-        onConfirm(context);
-        setContext('');
-    };
-
-    if (!isOpen) return null;
-
-    return (
-        <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50">
-            <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-lg mx-4">
-                <h2 className="text-2xl font-bold text-white mb-4">Add Extra Context</h2>
-                <p className="text-gray-300 mb-4">Provide any additional details or instructions for the AI to generate more relevant tasks.</p>
-                <textarea
-                    value={context}
-                    onChange={(e) => setContext(e.target.value)}
-                    placeholder="e.g., Focus on the marketing aspects..."
-                    className="w-full h-24 bg-gray-700 border border-gray-600 rounded-md p-2 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
-                />
-                <div className="flex justify-end gap-4 mt-6">
-                    <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">
-                        Cancel
-                    </button>
-                    <button onClick={handleConfirm} className="px-4 py-2 rounded-md bg-purple-600 hover:bg-purple-700 font-semibold text-white transition-colors">
-                        Generate Tasks
-                    </button>
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function GoalPlannerModal({ isOpen, onClose, userId }) {
-    const [goal, setGoal] = useState('');
-    const [isGenerating, setIsGenerating] = useState(false);
-    const [error, setError] = useState('');
-
-    const handleGeneratePlan = async () => {
-        const apiKey = process.env.REACT_APP_GEMINI_API_KEY;
-        if (!apiKey) {
-            setError("Gemini API key is not configured.");
-            return;
-        }
-        if (!goal.trim()) {
-            setError("Please enter a goal.");
-            return;
-        }
-        setIsGenerating(true);
-        setError('');
-
-        const prompt = `You are an expert project planner. A user has a high-level goal: "${goal}". 
-        
-        Your task is to decompose this goal into a series of 2 to 4 smaller, actionable projects. For each project, you must also generate a list of 3 to 5 specific tasks to complete it.
-        
-        The output must be a JSON object. For each project, provide a 'name' and a 'type' (e.g., "Course", "Personal", "Bootcamp"). For each task, provide a 'title' and a 'priority' ('High', 'Medium', or 'Low').`;
-
-        const payload = {
-            contents: [{ role: "user", parts: [{ text: prompt }] }],
-            generationConfig: {
-                responseMimeType: "application/json",
-                responseSchema: {
-                    type: "OBJECT",
-                    properties: {
-                        projects: {
-                            type: "ARRAY",
-                            items: {
-                                type: "OBJECT",
-                                properties: {
-                                    name: { type: "STRING" },
-                                    type: { type: "STRING", enum: ["Course", "Conference", "Seminar", "Bootcamp", "Personal"] },
-                                    tasks: {
-                                        type: "ARRAY",
-                                        items: {
-                                            type: "OBJECT",
-                                            properties: {
-                                                title: { type: "STRING" },
-                                                priority: { type: "STRING", enum: ["High", "Medium", "Low"] }
-                                            },
-                                            required: ["title", "priority"]
-                                        }
-                                    }
-                                },
-                                required: ["name", "type", "tasks"]
-                            }
-                        }
-                    },
-                    required: ["projects"]
-                }
-            }
-        };
-
-        try {
-            const result = await callGeminiWithRetry(payload, apiKey);
-            
-            if (result.candidates && result.candidates[0].content.parts[0].text) {
-                const plan = JSON.parse(result.candidates[0].content.parts[0].text);
-                if (plan.projects && plan.projects.length > 0) {
-                    const batch = writeBatch(db);
-                    
-                    // 1. Create the Goal
-                    const goalRef = doc(collection(db, `artifacts/${appId}/users/${userId}/goals`));
-                    batch.set(goalRef, { name: goal, createdAt: new Date() });
-
-                    // 2. Create Projects and Tasks
-                    plan.projects.forEach(proj => {
-                        const projectRef = doc(collection(db, `artifacts/${appId}/users/${userId}/projects`));
-                        batch.set(projectRef, {
-                            name: proj.name,
-                            type: proj.type,
-                            goalId: goalRef.id,
-                            createdAt: new Date(),
-                            status: 'In Progress',
-                            progress: 0
-                        });
-
-                        proj.tasks.forEach(task => {
-                            const taskRef = doc(collection(db, `artifacts/${appId}/users/${userId}/tasks`));
-                            batch.set(taskRef, {
-                                ...task,
-                                projectId: projectRef.id,
-                                completed: false,
-                                createdAt: new Date(),
-                                dueDate: ''
-                            });
-                        });
-                    });
-
-                    await batch.commit();
-                    setGoal('');
-                    onClose();
-                } else {
-                    throw new Error("The AI did not generate any projects for this goal.");
-                }
-            } else {
-                throw new Error("Received an invalid response from the AI.");
-            }
-        } catch (e) {
-            console.error("AI Goal Planner Error:", e);
-            setError(e.message || "An unexpected error occurred.");
-        } finally {
-            setIsGenerating(false);
-        }
-    };
-
-    if (!isOpen) return null;
-
-    return (
-        <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50">
-            <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-lg mx-4">
-                <div className="flex justify-between items-center mb-4">
-                    <h2 className="text-2xl font-bold text-white">AI Goal Planner</h2>
-                    <button onClick={onClose} className="p-1 text-gray-400 hover:text-white"><X size={24} /></button>
-                </div>
-                <p className="text-gray-300 mb-4">Describe a high-level goal, and the AI will break it down into actionable projects and tasks for you.</p>
-                <textarea
-                    value={goal}
-                    onChange={(e) => setGoal(e.target.value)}
-                    placeholder="e.g., Learn web development in 6 months"
-                    className="w-full h-28 bg-gray-700 border border-gray-600 rounded-md p-3 text-base focus:outline-none focus:ring-2 focus:ring-purple-500"
-                />
-                {error && <p className="text-red-400 text-sm mt-2">{error}</p>}
-                <div className="flex justify-end gap-4 mt-6">
-                    <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">
-                        Cancel
-                    </button>
-                    <button onClick={handleGeneratePlan} disabled={isGenerating} className="px-4 py-2 rounded-md bg-purple-600 hover:bg-purple-700 font-semibold text-white transition-colors flex items-center gap-2 disabled:bg-purple-800 disabled:cursor-not-allowed">
-                        {isGenerating ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <Sparkles size={18} />}
-                        {isGenerating ? 'Generating Plan...' : 'Generate Plan'}
-                    </button>
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function DailyPlannerModal({ isOpen, onClose, plan, isLoading, error, retry }) {
-    if (!isOpen) return null;
-
-    return (
-        <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50 p-4">
-            <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-2xl max-h-[90vh] flex flex-col">
-                <div className="flex justify-between items-center mb-4">
-                    <h2 className="text-2xl font-bold text-white">Your Daily Plan</h2>
-                    <button onClick={onClose} className="p-1 text-gray-400 hover:text-white"><X size={24} /></button>
-                </div>
-                <div className="overflow-y-auto flex-grow pr-2">
-                    {isLoading && (
-                        <div className="flex flex-col items-center justify-center h-64">
-                            <div className="animate-spin rounded-full h-16 w-16 border-t-2 border-b-2 border-blue-500 mb-4"></div>
-                            <p className="text-lg text-gray-300">Your AI assistant is planning your day...</p>
-                        </div>
-                    )}
-                    {error && (
-                        <div className="text-center h-64 flex flex-col justify-center items-center">
-                            <p className="text-red-400 mb-4">Error: {error}</p>
-                            <button onClick={retry} className="px-4 py-2 rounded-md bg-blue-600 hover:bg-blue-700 font-semibold transition-colors">
-                                Try Again
-                            </button>
-                        </div>
-                    )}
-                    {plan && (
-                        <div className="text-gray-300 whitespace-pre-wrap font-mono text-sm leading-relaxed" dangerouslySetInnerHTML={{ __html: plan.replace(/\n/g, '<br />') }}>
-                        </div>
-                    )}
-                </div>
-                <div className="flex justify-end mt-6">
-                     <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">
-                        Close
-                    </button>
-                </div>
-            </div>
-        </div>
+    return user ? (
+        <HubApp user={user} handleSignOut={signOutUser} />
+    ) : (
+        <LoginScreen
+            onGoogleSignIn={signInWithGoogle}
+            onEmailSignIn={emailSignIn}
+            onEmailSignUp={emailSignUp}
+        />
     );
 }
diff --git a/src/App2.js b/src/App2.js
deleted file mode 100644
index 8532da4..0000000
--- a/src/App2.js
+++ /dev/null
@@ -1,1453 +0,0 @@
-import React, { useState, useEffect, useMemo } from 'react';
-import { initializeApp } from 'firebase/app';
-import { getAuth, onAuthStateChanged, GoogleAuthProvider, signInWithPopup, signOut, createUserWithEmailAndPassword, signInWithEmailAndPassword } from 'firebase/auth';
-import { getFirestore, collection, doc, addDoc, updateDoc, deleteDoc, onSnapshot, query, where, getDocs, writeBatch } from 'firebase/firestore';
-import { Book, Calendar, CheckSquare, ChevronDown, ChevronRight, Clock, Edit2, Flame, Info, LogOut, Plus, Repeat, Save, Sparkles, Tag, Trash2, TrendingUp, X } from 'lucide-react';
-import { callGeminiWithRetry } from './services/geminiService';
-
-// --- Firebase Configuration ---
-// It's recommended to store these in environment variables
-const firebaseConfig = {
-  apiKey: process.env.REACT_APP_FIREBASE_API_KEY,
-  authDomain: process.env.REACT_APP_FIREBASE_AUTH_DOMAIN,
-  projectId: process.env.REACT_APP_FIREBASE_PROJECT_ID,
-  storageBucket: process.env.REACT_APP_FIREBASE_STORAGE_BUCKET,
-  messagingSenderId: process.env.REACT_APP_FIREBASE_MESSAGING_SENDER_ID,
-  appId: process.env.REACT_APP_FIREBASE_APP_ID
-};
-
-const appId = 'my-prod-hub';
-const GOOGLE_CLIENT_ID = process.env.REACT_APP_GOOGLE_CLIENT_ID || "";
-
-// --- Firebase Initialization ---
-let app;
-let auth;
-let db;
-// A simple check to see if the config is placeholder or not
-const isFirebaseConfigured = firebaseConfig.apiKey && firebaseConfig.apiKey !== "YOUR_API_KEY";
-
-if (isFirebaseConfigured) {
-    try {
-        app = initializeApp(firebaseConfig);
-        auth = getAuth(app);
-        db = getFirestore(app);
-    } catch (error) {
-        console.error("Firebase initialization error:", error);
-    }
-}
-
-// --- Helper Functions ---
-const formatDate = (date) => {
-    if (!date) return 'N/A';
-    // Handles both Firestore Timestamps and JS Date objects
-    const d = date instanceof Date ? date : date.toDate();
-    return new Intl.DateTimeFormat('en-US', { year: 'numeric', month: 'short', day: 'numeric' }).format(d);
-};
-
-const formatTime = (date) => {
-    if (!date) return '';
-    const d = new Date(date);
-    // Check if it's an all-day event (time is midnight UTC)
-    if (d.getUTCHours() === 0 && d.getUTCMinutes() === 0 && d.getUTCSeconds() === 0) {
-        return 'All-day';
-    }
-    return new Intl.DateTimeFormat('en-US', { hour: 'numeric', minute: '2-digit', hour12: true }).format(d);
-};
-
-const getLocalDateKey = (date) => {
-    const d = new Date(date);
-    // Adjust for timezone offset to get the correct local date
-    d.setMinutes(d.getMinutes() - d.getTimezoneOffset());
-    return d.toISOString().split('T')[0]; // YYYY-MM-DD
-};
-
-// --- Configuration Error Component ---
-function ConfigurationNeeded({ missingFirebase, missingGoogle }) {
-  return (
-    <div className="flex items-center justify-center h-screen bg-gray-900 text-white p-8">
-      <div className="bg-yellow-900/50 border border-yellow-700 rounded-lg p-8 max-w-2xl text-center">
-        <Info size={48} className="text-yellow-300 mx-auto mb-4" />
-        <h1 className="text-3xl font-bold text-yellow-200 mb-4">Configuration Required</h1>
-        {missingFirebase && <div className="text-left bg-gray-800 p-4 rounded-md mb-4"><p className="text-gray-300 mb-2"><strong>Firebase Config Missing:</strong> Please ensure your Firebase environment variables (REACT_APP_FIREBASE_*) are set correctly in your <code>.env.local</code> file.</p></div>}
-        {missingGoogle && <div className="text-left bg-gray-800 p-4 rounded-md"><p className="text-gray-300 mb-2"><strong>Google Client ID Missing:</strong> Please ensure REACT_APP_GOOGLE_CLIENT_ID is set in your <code>.env.local</code> file to enable Google Calendar sync.</p></div>}
-      </div>
-    </div>
-  );
-}
-
-// --- Login Screen Component ---
-function LoginScreen() {
-    const [email, setEmail] = useState('');
-    const [password, setPassword] = useState('');
-    const [error, setError] = useState('');
-    const [isSigningUp, setIsSigningUp] = useState(false);
-
-    const handleGoogleSignIn = async () => {
-        const provider = new GoogleAuthProvider();
-        try {
-            await signInWithPopup(auth, provider);
-        } catch (error) {
-            setError(error.message);
-            console.error("Google Sign-In Error:", error);
-        }
-    };
-
-    const handleEmailAuth = async (e) => {
-        e.preventDefault();
-        setError('');
-        try {
-            if (isSigningUp) {
-                await createUserWithEmailAndPassword(auth, email, password);
-            } else {
-                await signInWithEmailAndPassword(auth, email, password);
-            }
-        } catch (error) {
-            setError(error.message);
-        }
-    };
-
-    return (
-        <div className="flex items-center justify-center h-screen bg-gray-900 text-white">
-            <div className="w-full max-w-md p-8 space-y-6 bg-gray-800 rounded-lg shadow-lg">
-                <div className="text-center">
-                    <h1 className="text-3xl font-bold text-blue-400">Welcome to ProdHub</h1>
-                    <p className="text-gray-400">Sign in to continue</p>
-                </div>
-                <button onClick={handleGoogleSignIn} className="w-full flex items-center justify-center gap-3 py-3 px-4 bg-red-600 hover:bg-red-700 rounded-md font-semibold transition-colors">
-                    <svg className="w-6 h-6" viewBox="0 0 48 48"><path fill="#EA4335" d="M24 9.5c3.54 0 6.71 1.22 9.21 3.6l6.85-6.85C35.9 2.38 30.47 0 24 0 14.62 0 6.51 5.38 2.56 13.22l7.98 6.19C12.43 13.72 17.74 9.5 24 9.5z"></path><path fill="#4285F4" d="M46.98 24.55c0-1.57-.15-3.09-.38-4.55H24v9.02h12.94c-.58 2.96-2.26 5.48-4.78 7.18l7.73 6c4.51-4.18 7.09-10.36 7.09-17.65z"></path><path fill="#FBBC05" d="M10.53 28.59c-.48-1.45-.76-2.99-.76-4.59s.27-3.14.76-4.59l-7.98-6.19C.92 16.46 0 20.12 0 24c0 3.88.92 7.54 2.56 10.78l7.97-6.19z"></path><path fill="#34A853" d="M24 48c6.48 0 11.93-2.13 15.89-5.81l-7.73-6c-2.15 1.45-4.92 2.3-8.16 2.3-6.26 0-11.57-4.22-13.47-9.91l-7.98 6.19C6.51 42.62 14.62 48 24 48z"></path><path fill="none" d="M0 0h48v48H0z"></path></svg>
-                    Sign in with Google
-                </button>
-                <div className="relative"><div className="absolute inset-0 flex items-center"><div className="w-full border-t border-gray-600"></div></div><div className="relative flex justify-center text-sm"><span className="px-2 bg-gray-800 text-gray-500">Or continue with</span></div></div>
-                <form onSubmit={handleEmailAuth} className="space-y-4">
-                    <input type="email" placeholder="Email" value={email} onChange={e => setEmail(e.target.value)} className="w-full px-4 py-2 bg-gray-700 border border-gray-600 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                    <input type="password" placeholder="Password" value={password} onChange={e => setPassword(e.target.value)} className="w-full px-4 py-2 bg-gray-700 border border-gray-600 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                    {error && <p className="text-red-400 text-sm text-center">{error}</p>}
-                    <button type="submit" className="w-full py-2 px-4 bg-blue-600 hover:bg-blue-700 rounded-md font-semibold transition-colors">{isSigningUp ? 'Sign Up' : 'Sign In'}</button>
-                </form>
-                <p className="text-center text-sm text-gray-400">
-                    {isSigningUp ? 'Already have an account?' : "Don't have an account?"}
-                    <button onClick={() => setIsSigningUp(!isSigningUp)} className="font-medium text-blue-400 hover:underline ml-1">
-                        {isSigningUp ? 'Sign In' : 'Sign Up'}
-                    </button>
-                </p>
-            </div>
-        </div>
-    );
-}
-
-// This is the main content of your application
-function HubApp({ user, handleSignOut }) {
-    const [projects, setProjects] = useState([]);
-    const [tasks, setTasks] = useState([]);
-    const [habits, setHabits] = useState([]);
-    const [goals, setGoals] = useState([]);
-    const [habitEntries, setHabitEntries] = useState([]);
-    const [activeView, setActiveView] = useState('dashboard');
-    const [selectedProjectId, setSelectedProjectId] = useState(null);
-    
-    const [syncedEvents, setSyncedEvents] = useState([]);
-    const [tokenClient, setTokenClient] = useState(null);
-    const [isGsiScriptLoaded, setIsGsiScriptLoaded] = useState(false);
-
-    // Effect to load the Google Sign-In script
-    useEffect(() => {
-        const script = document.createElement('script');
-        script.src = 'https://accounts.google.com/gsi/client';
-        script.async = true;
-        script.defer = true;
-        script.onload = () => setIsGsiScriptLoaded(true);
-        document.body.appendChild(script);
-        return () => document.body.removeChild(script);
-    }, []);
-
-    // Effect to initialize the Google token client once the script is loaded
-    useEffect(() => {
-        if (isGsiScriptLoaded && window.google && GOOGLE_CLIENT_ID) {
-            const client = window.google.accounts.oauth2.initTokenClient({ client_id: GOOGLE_CLIENT_ID, scope: 'https://www.googleapis.com/auth/calendar.readonly', callback: '' });
-            setTokenClient(client);
-        }
-    }, [isGsiScriptLoaded]);
-
-    // Effect to subscribe to Firestore data
-    useEffect(() => {
-        if (!user || !db) return;
-        const basePath = `artifacts/${appId}/users/${user.uid}`;
-
-        const projectsQuery = query(collection(db, `${basePath}/projects`));
-        const unsubscribeProjects = onSnapshot(projectsQuery, (snapshot) => {
-            const projectsData = snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }));
-            setProjects(projectsData);
-            if (selectedProjectId && !snapshot.docs.some(doc => doc.id === selectedProjectId)) {
-                setActiveView('dashboard');
-                setSelectedProjectId(null);
-            }
-        });
-
-        const tasksQuery = query(collection(db, `${basePath}/tasks`));
-        const unsubscribeTasks = onSnapshot(tasksQuery, (snapshot) => setTasks(snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }))));
-        
-        const habitsQuery = query(collection(db, `${basePath}/habits`));
-        const unsubscribeHabits = onSnapshot(habitsQuery, (snapshot) => setHabits(snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }))));
-
-        const goalsQuery = query(collection(db, `${basePath}/goals`));
-        const unsubscribeGoals = onSnapshot(goalsQuery, (snapshot) => setGoals(snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }))));
-
-        const habitEntriesQuery = query(collection(db, `${basePath}/habit_entries`));
-        const unsubscribeHabitEntries = onSnapshot(habitEntriesQuery, (snapshot) => setHabitEntries(snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }))));
-
-        // Cleanup subscriptions on component unmount
-        return () => {
-            unsubscribeProjects();
-            unsubscribeTasks();
-            unsubscribeHabits();
-            unsubscribeGoals();
-            unsubscribeHabitEntries();
-        };
-    }, [user, selectedProjectId]); // Re-run if user changes
-
-    const selectedProject = useMemo(() => projects.find(p => p.id === selectedProjectId), [selectedProjectId, projects]);
-    
-    const handleSetView = (view, projectId = null) => {
-        setActiveView(view);
-        setSelectedProjectId(projectId);
-    };
-
-    return (
-        <div className="bg-gray-900 text-gray-100 min-h-screen font-sans flex">
-            <Sidebar onViewChange={handleSetView} projects={projects} goals={goals} userId={user.uid} handleSignOut={handleSignOut} />
-            <main className="flex-1 p-4 sm:p-6 lg:p-8 overflow-y-auto">
-                {activeView === 'dashboard' && <Dashboard projects={projects} tasks={tasks} onViewChange={handleSetView} syncedEvents={syncedEvents} />}
-                {activeView === 'project' && selectedProject && <ProjectDetail project={selectedProject} allTasks={tasks} syncedEvents={syncedEvents} />}
-                {activeView === 'all_tasks' && <AllTasksView tasks={tasks} projects={projects} />}
-                {activeView === 'schedule' && <ScheduleView projects={projects} tasks={tasks} syncedEvents={syncedEvents} setSyncedEvents={setSyncedEvents} tokenClient={tokenClient} />}
-                {activeView === 'habit_tracker' && <HabitTrackerView habits={habits} entries={habitEntries} />}
-                {activeView === 'weekly_review' && <WeeklyReviewView tasks={tasks} projects={projects} habits={habits} entries={habitEntries} />}
-            </main>
-        </div>
-    );
-}
-
-// --- Top-Level App Component (Handles Conditional Logic) ---
-export default function App() {
-    const [user, setUser] = useState(null);
-    const [isAuthReady, setIsAuthReady] = useState(false);
-
-    useEffect(() => {
-        if (!auth) {
-            setIsAuthReady(true); // If firebase isn't configured, we can't check auth
-            return;
-        }
-        const unsubscribe = onAuthStateChanged(auth, (currentUser) => {
-            setUser(currentUser);
-            setIsAuthReady(true);
-        });
-        return () => unsubscribe();
-    }, []);
-
-    const handleSignOut = async () => {
-        if(auth) {
-            await signOut(auth);
-        }
-    };
-
-    if (!isFirebaseConfigured || !GOOGLE_CLIENT_ID) {
-        return <ConfigurationNeeded missingFirebase={!isFirebaseConfigured} missingGoogle={!GOOGLE_CLIENT_ID} />;
-    }
-
-    if (!isAuthReady) {
-        return <div className="flex items-center justify-center h-screen bg-gray-900 text-white"><div className="animate-spin rounded-full h-32 w-32 border-t-2 border-b-2 border-blue-500"></div></div>;
-    }
-
-    return user ? <HubApp user={user} handleSignOut={handleSignOut} /> : <LoginScreen />;
-}
-
-// --- Components ---
-function Sidebar({ onViewChange, projects, goals, userId, handleSignOut }) {
-    const [isAddingProject, setIsAddingProject] = useState(false);
-    const [newProjectName, setNewProjectName] = useState('');
-    const [newProjectType, setNewProjectType] = useState('Course');
-    const [showGoalModal, setShowGoalModal] = useState(false);
-
-    const handleAddProject = async (e) => {
-        e.preventDefault();
-        if (!newProjectName.trim() || !userId || !db) return;
-        const project = { name: newProjectName, type: newProjectType, createdAt: new Date(), status: 'In Progress', progress: 0, goalId: null };
-        try {
-            await addDoc(collection(db, `artifacts/${appId}/users/${userId}/projects`), project);
-            setNewProjectName('');
-            setIsAddingProject(false);
-        } catch (error) {
-            console.error("Error adding project:", error);
-        }
-    };
-
-    const { standaloneProjects, goalProjects } = useMemo(() => {
-        const standalone = projects.filter(p => !p.goalId);
-        const grouped = projects.reduce((acc, project) => {
-            if (project.goalId) {
-                (acc[project.goalId] = acc[project.goalId] || []).push(project);
-            }
-            return acc;
-        }, {});
-        return { standaloneProjects: standalone, goalProjects: grouped };
-    }, [projects]);
-
-
-    return (
-        <>
-            <GoalPlannerModal isOpen={showGoalModal} onClose={() => setShowGoalModal(false)} userId={userId} />
-            <aside className="w-64 bg-gray-900/50 border-r border-gray-700/50 p-4 flex flex-col">
-                <div className="space-y-6 flex-1 overflow-y-auto">
-                    <h1 className="text-2xl font-bold text-blue-400 flex items-center gap-2"><Book size={24} /> ProdHub</h1>
-                    <nav className="space-y-2">
-                        <button onClick={() => onViewChange('dashboard')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><CheckSquare size={20} /> Dashboard</button>
-                        <button onClick={() => onViewChange('weekly_review')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><TrendingUp size={20} /> Weekly Review</button>
-                        <button onClick={() => onViewChange('habit_tracker')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><Repeat size={20} /> Habit Tracker</button>
-                        <button onClick={() => onViewChange('all_tasks')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><CheckSquare size={20} /> All Tasks</button>
-                        <button onClick={() => onViewChange('schedule')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><Calendar size={20} /> Schedule</button>
-                        
-                        <div className="pt-4">
-                            <h2 className="text-sm font-semibold text-gray-500 px-3 mb-2">Goals</h2>
-                             <button onClick={() => setShowGoalModal(true)} className="w-full flex items-center gap-3 px-3 py-2 mt-2 rounded-md text-purple-400 hover:bg-purple-900/50 transition-colors"><Sparkles size={20} /> AI Goal Planner</button>
-                            {goals.map(goal => (
-                                <GoalDropdown key={goal.id} goal={goal} projects={goalProjects[goal.id] || []} onViewChange={onViewChange} userId={userId} />
-                            ))}
-                        </div>
-
-                        <div className="pt-4">
-                            <h2 className="text-sm font-semibold text-gray-500 px-3 mb-2">Projects</h2>
-                            {standaloneProjects.map(p => (
-                                <button key={p.id} onClick={() => onViewChange('project', p.id)} className="w-full text-left flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors truncate">
-                                   <div className={`w-2 h-2 rounded-full ${p.type === 'Course' ? 'bg-green-400' : p.type === 'Seminar' ? 'bg-purple-400' : 'bg-yellow-400'}`}></div>
-                                   {p.name}
-                                </button>
-                            ))}
-                            <button onClick={() => setIsAddingProject(!isAddingProject)} className="w-full flex items-center gap-3 px-3 py-2 mt-2 rounded-md text-blue-400 hover:bg-blue-900/50 transition-colors"><Plus size={20} /> Add Project</button>
-                            {isAddingProject && (
-                                <form onSubmit={handleAddProject} className="p-3 bg-gray-800 rounded-md mt-2 space-y-2">
-                                    <input type="text" value={newProjectName} onChange={e => setNewProjectName(e.target.value)} placeholder="Project Name" className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500" />
-                                    <select value={newProjectType} onChange={e => setNewProjectType(e.target.value)} className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500">
-                                        <option>Course</option><option>Conference</option><option>Seminar</option><option>Bootcamp</option><option>Personal</option>
-                                    </select>
-                                    <button type="submit" className="w-full bg-blue-600 hover:bg-blue-700 rounded-md py-1 text-sm font-semibold">Save</button>
-                                </form>
-                            )}
-                        </div>
-                    </nav>
-                </div>
-                <button onClick={handleSignOut} className="w-full flex-shrink-0 flex items-center gap-3 px-3 py-2 rounded-md text-gray-400 hover:bg-red-900/50 hover:text-red-300 transition-colors mt-4">
-                    <LogOut size={20} /> Sign Out
-                </button>
-            </aside>
-        </>
-    );
-}
-
-function GoalDropdown({ goal, projects, onViewChange, userId }) {
-    const [isOpen, setIsOpen] = useState(true);
-    const [isEditing, setIsEditing] = useState(false);
-    const [editedName, setEditedName] = useState(goal.name);
-    const [showDeleteModal, setShowDeleteModal] = useState(false);
-
-    const handleUpdate = async (e) => {
-        e.preventDefault();
-        if (!editedName.trim()) return;
-        await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/goals`, goal.id), { name: editedName });
-        setIsEditing(false);
-    };
-
-    const handleDelete = async () => {
-        if (!userId || !db) return;
-        setShowDeleteModal(false);
-        const batch = writeBatch(db);
-
-        // Delete the goal
-        batch.delete(doc(db, `artifacts/${appId}/users/${userId}/goals`, goal.id));
-
-        // Delete all projects and tasks associated with the goal
-        for (const project of projects) {
-            batch.delete(doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id));
-            const tasksQuery = query(collection(db, `artifacts/${appId}/users/${userId}/tasks`), where("projectId", "==", project.id));
-            const tasksSnapshot = await getDocs(tasksQuery);
-            tasksSnapshot.forEach(taskDoc => batch.delete(taskDoc.ref));
-        }
-        await batch.commit();
-    };
-
-    return (
-        <div className="text-sm">
-            <ConfirmModal isOpen={showDeleteModal} onClose={() => setShowDeleteModal(false)} onConfirm={handleDelete} title="Delete Goal" message={`Are you sure you want to delete the goal "${goal.name}" and all its projects and tasks?`} />
-            <div className="flex items-center justify-between px-3 py-2 rounded-md hover:bg-gray-700/50 group">
-                {isEditing ? (
-                    <form onSubmit={handleUpdate} className="flex-grow flex items-center gap-2">
-                        <input value={editedName} onChange={(e) => setEditedName(e.target.value)} className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500" autoFocus />
-                        <button type="submit" className="p-1 text-green-400 hover:text-white"><Save size={16} /></button>
-                    </form>
-                ) : (
-                    <button onClick={() => setIsOpen(!isOpen)} className="flex items-center gap-2 flex-grow text-left">
-                        {isOpen ? <ChevronDown size={16} /> : <ChevronRight size={16} />}
-                        <span className="font-semibold text-gray-200 truncate">{goal.name}</span>
-                    </button>
-                )}
-                <div className="flex items-center opacity-0 group-hover:opacity-100 transition-opacity">
-                    <button onClick={() => setIsEditing(true)} className="p-1 text-gray-400 hover:text-white"><Edit2 size={16} /></button>
-                    <button onClick={() => setShowDeleteModal(true)} className="p-1 text-gray-400 hover:text-red-400"><Trash2 size={16} /></button>
-                </div>
-            </div>
-            {isOpen && (
-                <div className="pl-6 border-l-2 border-gray-700 ml-5 my-1">
-                    {projects.map(p => (
-                        <button key={p.id} onClick={() => onViewChange('project', p.id)} className="w-full text-left flex items-center gap-3 px-3 py-1.5 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors truncate">
-                            <div className={`w-2 h-2 rounded-full ${p.type === 'Course' ? 'bg-green-400' : p.type === 'Seminar' ? 'bg-purple-400' : 'bg-yellow-400'}`}></div>
-                            {p.name}
-                        </button>
-                    ))}
-                     {projects.length === 0 && <p className="px-3 py-1.5 text-xs text-gray-500">No projects yet.</p>}
-                </div>
-            )}
-        </div>
-    );
-}
-
-function Dashboard({ projects, tasks, onViewChange, syncedEvents }) {
-    const [showPlanModal, setShowPlanModal] = useState(false);
-    const [dailyPlan, setDailyPlan] = useState('');
-    const [isPlanning, setIsPlanning] = useState(false);
-    const [planningError, setPlanningError] = useState('');
-
-    const today = new Date();
-    today.setHours(0,0,0,0);
-    const todayKey = getLocalDateKey(new Date());
-
-    const upcomingTasks = tasks.filter(t => !t.completed && t.dueDate).map(t => ({...t, dueDateObj: new Date(t.dueDate)})).filter(t => t.dueDateObj >= today).sort((a, b) => a.dueDateObj - b.dueDateObj).slice(0, 5);
-    const overdueTasks = tasks.filter(t => !t.completed && t.dueDate && new Date(t.dueDate) < today);
-
-    const handlePlanMyDay = async () => {
-        setShowPlanModal(true);
-        setIsPlanning(true);
-        setDailyPlan('');
-        setPlanningError('');
-
-        const apiKey = process.env.REACT_APP_GEMINI_API_KEY;
-        if (!apiKey) {
-            setPlanningError("Gemini API key is not configured.");
-            setIsPlanning(false);
-            return;
-        }
-
-        const todaysTasks = tasks.filter(t => !t.completed && t.dueDate === todayKey);
-        const todaysEvents = syncedEvents.filter(e => getLocalDateKey(e.date) === todayKey);
-
-        let context = `Today is ${new Date().toLocaleDateString('en-US', { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' })}.\n\n`;
-        
-        if(overdueTasks.length > 0) {
-            context += "Here are the overdue tasks that need urgent attention:\n" + overdueTasks.map(t => `- ${t.title} (Priority: ${t.priority})`).join('\n') + '\n\n';
-        }
-
-        if(todaysTasks.length > 0) {
-            context += "Here are the tasks scheduled for today:\n" + todaysTasks.map(t => `- ${t.title} (Priority: ${t.priority})`).join('\n') + '\n\n';
-        }
-
-        if(todaysEvents.length > 0) {
-            context += "Here are the fixed appointments from the calendar:\n" + todaysEvents.map(e => `- ${e.title} at ${formatTime(e.date)}`).join('\n') + '\n\n';
-        } else {
-            context += "There are no events synced from the calendar for today. You can add them from the Schedule page for a better plan.\n\n"
-        }
-
-        if (overdueTasks.length === 0 && todaysTasks.length === 0 && todaysEvents.length === 0) {
-            setDailyPlan("You have a clear schedule today! No overdue tasks, today's tasks, or calendar events. It's a great day to get ahead on a project or start planning your next steps.");
-            setIsPlanning(false);
-            return;
-        }
-
-        const prompt = `You are a productivity coach. Based on the following information, create a prioritized, motivational, and realistic schedule for the day. Group tasks logically, suggest breaks, and slot tasks around fixed appointments. Start with the most critical items.
-
-        ${context}
-        
-        Generate a step-by-step plan.`;
-
-        const payload = { contents: [{ role: "user", parts: [{ text: prompt }] }] };
-
-        try {
-            const result = await callGeminiWithRetry(payload, apiKey);
-            
-            if (result.candidates && result.candidates[0].content.parts[0].text) {
-                setDailyPlan(result.candidates[0].content.parts[0].text);
-            } else {
-                throw new Error("Received an invalid response from the AI.");
-            }
-        } catch (e) {
-            console.error("AI Daily Planner Error:", e);
-            setPlanningError(e.message || "An unexpected error occurred.");
-        } finally {
-            setIsPlanning(false);
-        }
-    };
-
-    return (
-        <>
-            <DailyPlannerModal 
-                isOpen={showPlanModal}
-                onClose={() => setShowPlanModal(false)}
-                plan={dailyPlan}
-                isLoading={isPlanning}
-                error={planningError}
-                retry={handlePlanMyDay}
-            />
-            <div className="space-y-8">
-                <div className="flex flex-wrap gap-4 justify-between items-center">
-                    <h1 className="text-4xl font-bold text-white">Dashboard</h1>
-                    <button onClick={handlePlanMyDay} disabled={isPlanning} className="flex items-center gap-2 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded-md font-semibold transition-colors disabled:bg-blue-800 disabled:cursor-not-allowed">
-                        {isPlanning ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <Sparkles size={18} />}
-                        Plan My Day
-                    </button>
-                </div>
-                {overdueTasks.length > 0 && (
-                    <div className="bg-red-900/50 border border-red-700 rounded-lg p-4">
-                        <h2 className="text-xl font-semibold text-red-300 mb-3">Overdue Tasks ({overdueTasks.length})</h2>
-                        <div className="space-y-2">{overdueTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} isCompact={true} />)}</div>
-                    </div>
-                )}
-                <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
-                    <div className="bg-gray-800/60 rounded-lg p-6 space-y-4">
-                        <h2 className="text-2xl font-semibold text-gray-200">Upcoming Deadlines</h2>
-                        {upcomingTasks.length > 0 ? <div className="space-y-3">{upcomingTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} isCompact={true} />)}</div> : <p className="text-gray-400">No upcoming deadlines. Great job!</p>}
-                    </div>
-                    <div className="bg-gray-800/60 rounded-lg p-6 space-y-4">
-                        <h2 className="text-2xl font-semibold text-gray-200">Projects Overview</h2>
-                        <div className="space-y-4">
-                            {projects.length > 0 ? projects.map(p => (
-                                <div key={p.id} className="cursor-pointer" onClick={() => onViewChange('project', p.id)}>
-                                    <div className="flex justify-between items-center mb-1"><span className="font-medium text-gray-300">{p.name}</span><span className="text-sm text-gray-400">{Math.round(p.progress || 0)}%</span></div>
-                                    <div className="w-full bg-gray-700 rounded-full h-2.5"><div className="bg-blue-500 h-2.5 rounded-full" style={{ width: `${p.progress || 0}%` }}></div></div>
-                                </div>
-                            )) : <p className="text-gray-400">No projects yet. Add one from the sidebar!</p>}
-                        </div>
-                    </div>
-                </div>
-                <DailyReminder />
-            </div>
-        </>
-    );
-}
-
-function ProjectDetail({ project, allTasks, syncedEvents }) {
-    const [isAddingTask, setIsAddingTask] = useState(false);
-    const [newTask, setNewTask] = useState({ title: '', dueDate: '', priority: 'Medium' });
-    const [editingProject, setEditingProject] = useState(null);
-    const [showDeleteModal, setShowDeleteModal] = useState(null);
-    const [isGenerating, setIsGenerating] = useState(false);
-    const [geminiError, setGeminiError] = useState('');
-    const [showAiContextModal, setShowAiContextModal] = useState(false);
-
-    const userId = auth.currentUser?.uid;
-    const tasks = useMemo(() => allTasks.filter(t => t.projectId === project.id), [allTasks, project.id]);
-
-    // Effect to update project progress when tasks change
-    useEffect(() => {
-        if (!userId || !project || !db) return;
-        const completedTasks = tasks.filter(t => t.completed).length;
-        const totalTasks = tasks.length;
-        const progress = totalTasks > 0 ? (completedTasks / totalTasks) * 100 : 0;
-        if (project.progress !== progress) {
-            const projectRef = doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id);
-            updateDoc(projectRef, { progress });
-        }
-    }, [tasks, project, userId]);
-    
-    const handleAddTask = async (e) => {
-        e.preventDefault();
-        if (!newTask.title.trim() || !userId || !db) return;
-        const task = { ...newTask, projectId: project.id, completed: false, createdAt: new Date() };
-        await addDoc(collection(db, `artifacts/${appId}/users/${userId}/tasks`), task);
-        setNewTask({ title: '', dueDate: '', priority: 'Medium' });
-        setIsAddingTask(false);
-    };
-
-    const handleUpdateProject = async (e) => {
-        e.preventDefault();
-        if (!editingProject.name.trim() || !userId || !db) return;
-        await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id), { name: editingProject.name, type: editingProject.type });
-        setEditingProject(null);
-    };
-    
-    const handleDeleteProject = async () => {
-        if (!userId || !db) return;
-        setShowDeleteModal(null);
-        // Batch delete tasks for efficiency (optional but good practice)
-        for (const task of tasks) {
-            await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id));
-        }
-        await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id));
-    };
-
-    const handleGenerateTasks = async (customContext) => {
-        setShowAiContextModal(false);
-        const apiKey = process.env.REACT_APP_GEMINI_API_KEY;
-        if (!apiKey) {
-            setGeminiError("Gemini API key is not configured. Please add REACT_APP_GEMINI_API_KEY to your .env.local file.");
-            return;
-        }
-        if (!userId || !db) return;
-        setIsGenerating(true);
-        setGeminiError('');
-
-        const projectKeywords = project.name.toLowerCase().split(' ').filter(k => k.length > 2);
-        const relevantEvents = syncedEvents.filter(event => {
-            const eventTitle = event.title.toLowerCase();
-            return projectKeywords.some(keyword => eventTitle.includes(keyword));
-        });
-
-        let calendarContext = "";
-        if (relevantEvents.length > 0) {
-            const eventList = relevantEvents.map(e => `- "${e.title}" on ${formatDate(e.date)}`).join('\n');
-            calendarContext = `For background context, here are some of my upcoming, related events from my Google Calendar:\n${eventList}\n\n`;
-        }
-        
-        const userContext = customContext ? `Your main instruction is: "${customContext}"\n\n` : "";
-
-        const prompt = `You are a project planning assistant. Your primary goal is to generate a list of actionable to-do items based on the user's main instruction. Use the other information as background context.
-        
-        **Main Instruction from User:**
-        ${userContext || "Break down the project into actionable steps."}
-
-        **Background Context:**
-        - Project Name: "${project.name}"
-        - Project Type: "${project.type}"
-        ${calendarContext}
-        
-        Based on the user's main instruction and the background context, generate a list of 5 to 7 to-do items. For each item, provide a title and estimate its difficulty as 'High', 'Medium', or 'Low'. Do not create tasks that are identical to the calendar events, but rather tasks that lead up to them.`;
-        
-        const payload = { contents: [{ role: "user", parts: [{ text: prompt }] }], generationConfig: { responseMimeType: "application/json", responseSchema: { type: "OBJECT", properties: { tasks: { type: "ARRAY", items: { type: "OBJECT", properties: { title: { type: "STRING" }, priority: { type: "STRING", enum: ["High", "Medium", "Low"] } }, required: ["title", "priority"] } } }, required: ["tasks"] } } };
-        try {
-            const result = await callGeminiWithRetry(payload, apiKey);
-            if (result.candidates && result.candidates[0].content.parts[0].text) {
-                const generated = JSON.parse(result.candidates[0].content.parts[0].text);
-                if (generated.tasks && generated.tasks.length > 0) {
-                    for (const task of generated.tasks) {
-                        await addDoc(collection(db, `artifacts/${appId}/users/${userId}/tasks`), { title: task.title, priority: task.priority, projectId: project.id, completed: false, createdAt: new Date(), dueDate: '' });
-                    }
-                }
-            } else { throw new Error("No tasks were generated."); }
-        } catch (error) {
-            console.error("Gemini API error:", error);
-            setGeminiError(error.message || "An error occurred.");
-        } finally {
-            setIsGenerating(false);
-        }
-    };
-
-    return (
-        <div className="space-y-6">
-            <AiContextModal isOpen={showAiContextModal} onClose={() => setShowAiContextModal(false)} onConfirm={handleGenerateTasks} />
-            <ConfirmModal isOpen={showDeleteModal === 'project'} onClose={() => setShowDeleteModal(null)} onConfirm={handleDeleteProject} title="Delete Project" message={`Are you sure you want to delete "${project.name}" and all its tasks?`} />
-            {editingProject ? (
-                <form onSubmit={handleUpdateProject} className="flex items-center gap-4 bg-gray-800 p-4 rounded-lg">
-                    <input type="text" value={editingProject.name} onChange={e => setEditingProject({...editingProject, name: e.target.value})} className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-3 py-2 text-2xl font-bold focus:outline-none focus:ring-2 focus:ring-blue-500" />
-                    <select value={editingProject.type} onChange={e => setEditingProject({...editingProject, type: e.target.value})} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"><option>Course</option><option>Conference</option><option>Seminar</option><option>Bootcamp</option><option>Personal</option></select>
-                    <button type="submit" className="p-2 bg-green-600 hover:bg-green-700 rounded-md"><Save size={20} /></button>
-                    <button onClick={() => setEditingProject(null)} className="p-2 bg-gray-600 hover:bg-gray-700 rounded-md"><X size={20} /></button>
-                </form>
-            ) : (
-                <div className="flex items-center justify-between">
-                    <div className="flex items-center gap-4"><h1 className="text-4xl font-bold text-white">{project.name}</h1><span className="text-sm font-medium bg-blue-900/70 text-blue-300 px-3 py-1 rounded-full">{project.type}</span></div>
-                    <div className="flex items-center gap-2">
-                        <button onClick={() => setEditingProject({...project})} className="p-2 text-gray-400 hover:text-white hover:bg-gray-700 rounded-md"><Edit2 size={20} /></button>
-                        <button onClick={() => setShowDeleteModal('project')} className="p-2 text-gray-400 hover:text-red-500 hover:bg-gray-700 rounded-md"><Trash2 size={20} /></button>
-                    </div>
-                </div>
-            )}
-            <div>
-                <div className="flex justify-between items-center mb-1"><span className="text-sm font-medium text-gray-400">Progress</span><span className="text-sm font-medium text-white">{Math.round(project.progress || 0)}%</span></div>
-                <div className="w-full bg-gray-700 rounded-full h-2.5"><div className="bg-blue-500 h-2.5 rounded-full transition-all duration-500" style={{ width: `${project.progress || 0}%` }}></div></div>
-            </div>
-            <div className="bg-gray-800/60 rounded-lg p-6">
-                <div className="flex flex-wrap gap-4 justify-between items-center mb-4">
-                    <h2 className="text-2xl font-semibold">To-Do List</h2>
-                    <div className="flex gap-2">
-                        <button onClick={() => setShowAiContextModal(true)} disabled={isGenerating} className="flex items-center gap-2 bg-purple-600 hover:bg-purple-700 px-4 py-2 rounded-md font-semibold transition-colors disabled:bg-purple-800 disabled:cursor-not-allowed">
-                            {isGenerating ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <Sparkles size={18} />}
-                            {isGenerating ? 'Generating...' : '✨ Generate Tasks'}
-                        </button>
-                        <button onClick={() => setIsAddingTask(!isAddingTask)} className="flex items-center gap-2 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded-md font-semibold transition-colors"><Plus size={18} /> {isAddingTask ? 'Cancel' : 'Add Task'}</button>
-                    </div>
-                </div>
-                {geminiError && <div className="text-red-400 bg-red-900/50 p-3 rounded-md mb-4 text-sm">{geminiError}</div>}
-                {isAddingTask && (
-                    <form onSubmit={handleAddTask} className="grid grid-cols-1 md:grid-cols-3 gap-4 mb-6 p-4 bg-gray-900/50 rounded-md">
-                        <input type="text" value={newTask.title} onChange={e => setNewTask({...newTask, title: e.target.value})} placeholder="Task title..." className="md:col-span-2 bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                        <div className="grid grid-cols-2 gap-2">
-                           <input type="date" value={newTask.dueDate} onChange={e => setNewTask({...newTask, dueDate: e.target.value})} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500" />
-                           <select value={newTask.priority} onChange={e => setNewTask({...newTask, priority: e.target.value})} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"><option>High</option><option>Medium</option><option>Low</option></select>
-                        </div>
-                        <button type="submit" className="md:col-span-3 w-full bg-green-600 hover:bg-green-700 rounded-md py-2 font-semibold">Save Task</button>
-                    </form>
-                )}
-                <div className="space-y-3">
-                    {tasks.length > 0 ? tasks.sort((a,b) => a.completed - b.completed).map(task => <TaskItem key={task.id} task={task} />) : <p className="text-gray-400 text-center py-4">No tasks for this project yet. Try generating some with AI!</p>}
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function AllTasksView({ tasks, projects }) {
-    const [filter, setFilter] = useState('All');
-    const [sortBy, setSortBy] = useState('dueDate');
-    const filteredAndSortedTasks = useMemo(() => {
-        let filtered = tasks;
-        if (filter === 'Active') filtered = tasks.filter(t => !t.completed);
-        if (filter === 'Completed') filtered = tasks.filter(t => t.completed);
-        return [...filtered].sort((a, b) => {
-            if (sortBy === 'dueDate') return (a.dueDate ? new Date(a.dueDate) : new Date('2999-12-31')) - (b.dueDate ? new Date(b.dueDate) : new Date('2999-12-31'));
-            if (sortBy === 'priority') { const priorityOrder = { 'High': 1, 'Medium': 2, 'Low': 3 }; return priorityOrder[a.priority] - priorityOrder[b.priority]; }
-            if (sortBy === 'project') { const projectA = projects.find(p => p.id === a.projectId)?.name || ''; const projectB = projects.find(p => p.id === b.projectId)?.name || ''; return projectA.localeCompare(projectB); }
-            return 0;
-        });
-    }, [tasks, projects, filter, sortBy]);
-    return (
-        <div className="space-y-6">
-            <h1 className="text-4xl font-bold text-white">All Tasks</h1>
-            <div className="flex flex-wrap gap-4 items-center p-4 bg-gray-800/60 rounded-lg">
-                <div><span className="text-sm font-medium text-gray-400 mr-2">Filter by:</span><select onChange={(e) => setFilter(e.target.value)} value={filter} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-1.5 focus:outline-none focus:ring-2 focus:ring-blue-500"><option>All</option><option>Active</option><option>Completed</option></select></div>
-                <div><span className="text-sm font-medium text-gray-400 mr-2">Sort by:</span><select onChange={(e) => setSortBy(e.target.value)} value={sortBy} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-1.5 focus:outline-none focus:ring-2 focus:ring-blue-500"><option value="dueDate">Due Date</option><option value="priority">Priority</option><option value="project">Project</option></select></div>
-            </div>
-            <div className="space-y-3">{filteredAndSortedTasks.length > 0 ? filteredAndSortedTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} />) : <p className="text-gray-400 text-center py-8">No tasks found.</p>}</div>
-        </div>
-    );
-}
-
-function ScheduleView({ projects, tasks, syncedEvents, setSyncedEvents, tokenClient }) {
-    const [isLoading, setIsLoading] = useState(false);
-    const [error, setError] = useState(null);
-
-    const handleSync = () => {
-        if (tokenClient) {
-            tokenClient.callback = async (tokenResponse) => {
-                if (tokenResponse && tokenResponse.access_token) {
-                    setIsLoading(true);
-                    setError(null);
-                    try {
-                        const startTime = new Date().toISOString();
-                        const response = await fetch(`https://www.googleapis.com/calendar/v3/calendars/primary/events?timeMin=${startTime}&singleEvents=true&orderBy=startTime`, {
-                            headers: { 'Authorization': `Bearer ${tokenResponse.access_token}` },
-                        });
-                        if (!response.ok) throw new Error('Failed to fetch calendar events.');
-                        const data = await response.json();
-                        const formattedEvents = data.items
-                            .filter(item => !(item.summary && item.summary.toLowerCase().includes('birthday')))
-                            .map(item => ({
-                                id: `gcal-${item.id}`,
-                                title: item.summary,
-                                date: item.start.dateTime ? new Date(item.start.dateTime) : new Date(item.start.date),
-                                type: 'Google Calendar',
-                                color: 'bg-red-500'
-                            }));
-                        setSyncedEvents(formattedEvents);
-                    } catch (e) {
-                        setError('Could not fetch events. Please try again.');
-                        console.error(e);
-                    } finally {
-                        setIsLoading(false);
-                    }
-                }
-            };
-            tokenClient.requestAccessToken();
-        } else {
-            setError("Google Auth is not ready. Please wait a moment and try again.");
-        }
-    };
-    
-    const allEvents = useMemo(() => {
-        const today = new Date();
-        today.setHours(0, 0, 0, 0); // Set to start of today for accurate overdue comparison
-
-        const projectEvents = projects.map(p => ({
-            id: `proj-${p.id}`,
-            title: p.name,
-            date: p.deadline ? new Date(p.deadline) : null,
-            type: 'Project Deadline',
-            color: 'bg-purple-500'
-        }));
-
-        const taskEvents = tasks
-            .filter(t => !t.completed) // 1. Filter out completed tasks
-            .map(t => {
-                const dueDate = t.dueDate ? new Date(t.dueDate) : null;
-                const isOverdue = dueDate && dueDate < today; // 2. Check if task is overdue
-                return {
-                    id: `task-${t.id}`,
-                    title: t.title,
-                    date: dueDate,
-                    type: 'Task Deadline',
-                    color: isOverdue ? 'bg-red-700' : 'bg-green-500', // 3. Assign color based on overdue status
-                    isOverdue: isOverdue
-                };
-            });
-
-        return [...projectEvents, ...taskEvents, ...syncedEvents]
-            .filter(e => e.date && !isNaN(e.date))
-            .sort((a, b) => a.date - b.date);
-    }, [projects, tasks, syncedEvents]);
-
-    return (
-        <div className="space-y-6">
-            <div className="flex justify-between items-center">
-                <h1 className="text-4xl font-bold text-white">Schedule</h1>
-                <button onClick={handleSync} disabled={isLoading || !tokenClient} className="flex items-center gap-2 bg-red-600 hover:bg-red-700 px-4 py-2 rounded-md font-semibold transition-colors disabled:bg-red-800 disabled:cursor-not-allowed">
-                    {isLoading ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M8 2v4"/><path d="M16 2v4"/><rect width="18" height="18" x="3" y="4" rx="2"/><path d="M3 10h18"/></svg>}
-                    {isLoading ? 'Syncing...' : (syncedEvents.length > 0 ? 'Refresh Calendar' : 'Sync with Google Calendar')}
-                </button>
-            </div>
-            {error && <div className="text-red-400 bg-red-900/50 p-3 rounded-md text-sm">{error}</div>}
-            <div className="bg-gray-800/60 rounded-lg p-6">
-                <h2 className="text-2xl font-semibold mb-4">Upcoming Deadlines & Events</h2>
-                <div className="space-y-4">
-                    {allEvents.length > 0 ? allEvents.map(event => (
-                        <div key={event.id} className="flex items-center gap-4 p-3 bg-gray-900/50 rounded-md">
-                            <div className="flex flex-col items-center justify-center w-20 text-center">
-                                <span className="text-sm text-gray-400">{event.date.toLocaleString('default', { month: 'short' })}</span>
-                                <span className="text-2xl font-bold">{event.date.getDate()}</span>
-                            </div>
-                            <div className={`w-1.5 h-12 rounded-full ${event.color}`}></div>
-                            <div>
-                                <p className="font-semibold text-gray-200">{event.title}</p>
-                                <p className="text-sm text-gray-400">
-                                    {event.type}
-                                    {event.isOverdue && <span className="font-semibold text-red-400"> (Overdue)</span>}
-                                    {event.type === 'Google Calendar' && ` at ${formatTime(event.date)}`}
-                                </p>
-                            </div>
-                        </div>
-                    )) : <p className="text-gray-400">No scheduled events with deadlines.</p>}
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function TaskItem({ task, projects = [], isCompact = false }) {
-    const [isEditing, setIsEditing] = useState(false);
-    const [editTitle, setEditTitle] = useState(task.title);
-    const [editPriority, setEditPriority] = useState(task.priority || 'Medium');
-    const [showDeleteModal, setShowDeleteModal] = useState(false);
-    const userId = auth.currentUser?.uid;
-
-    const handleToggleComplete = async () => {
-        if (!userId || !db) return;
-        await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id), { completed: !task.completed, completedAt: !task.completed ? new Date() : null });
-    };
-
-    const handleUpdate = async (e) => {
-        e.preventDefault();
-        if (!userId || !editTitle.trim() || !db) return;
-        await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id), { 
-            title: editTitle,
-            priority: editPriority
-        });
-        setIsEditing(false);
-    };
-
-    const handleDelete = async () => {
-        if (!userId || !db) return;
-        await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id));
-        setShowDeleteModal(false);
-    };
-
-    const projectName = projects.find(p => p.id === task.projectId)?.name;
-    const priorityColor = { High: 'text-red-400', Medium: 'text-yellow-400', Low: 'text-green-400' };
-
-    if (isCompact) {
-        return (
-             <div className="flex items-center justify-between text-sm p-2 rounded-md bg-gray-900/30 hover:bg-gray-900/50">
-                <span className={`truncate ${task.completed ? 'line-through text-gray-500' : ''}`}>{task.title}</span>
-                <div className="flex items-center gap-2 text-gray-400">
-                    {task.dueDate && <span>{formatDate(new Date(task.dueDate))}</span>}
-                    {projectName && <span className="text-xs bg-gray-700 px-2 py-0.5 rounded">{projectName}</span>}
-                </div>
-            </div>
-        );
-    }
-
-    return (
-        <>
-            <ConfirmModal isOpen={showDeleteModal} onClose={() => setShowDeleteModal(false)} onConfirm={handleDelete} title="Delete Task" message={`Are you sure you want to delete this task: "${task.title}"?`} />
-            <div className={`p-3 rounded-md transition-colors flex items-start gap-3 ${task.completed ? 'bg-gray-800/50' : 'bg-gray-900/50'}`}>
-                <button onClick={handleToggleComplete} className="mt-1">
-                    <div className={`w-5 h-5 rounded border-2 flex items-center justify-center ${task.completed ? 'bg-blue-500 border-blue-500' : 'border-gray-500'}`}>
-                        {task.completed && <CheckSquare size={16} className="text-white" />}
-                    </div>
-                </button>
-                <div className="flex-grow">
-                    {isEditing ? (
-                        <form onSubmit={handleUpdate} className="flex gap-2 items-center">
-                            <input type="text" value={editTitle} onChange={e => setEditTitle(e.target.value)} className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500" autoFocus />
-                            <select value={editPriority} onChange={e => setEditPriority(e.target.value)} className="bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500">
-                                <option>High</option><option>Medium</option><option>Low</option>
-                            </select>
-                            <button type="submit" className="p-1.5 bg-green-600 hover:bg-green-700 rounded-md"><Save size={16} /></button>
-                        </form>
-                    ) : (
-                        <p className={`text-gray-200 ${task.completed ? 'line-through text-gray-500' : ''}`}>{task.title}</p>
-                    )}
-                    <div className="flex items-center gap-4 text-xs text-gray-400 mt-1">
-                        {task.dueDate && <div className="flex items-center gap-1"><Calendar size={12} /> {formatDate(new Date(task.dueDate))}</div>}
-                        {task.priority && <div className={`flex items-center gap-1 font-semibold ${priorityColor[task.priority]}`}><Tag size={12} /> {task.priority}</div>}
-                        {projectName && <div className="flex items-center gap-1"><Book size={12} /> {projectName}</div>}
-                    </div>
-                </div>
-                <div className="flex items-center gap-1">
-                    <button onClick={() => setIsEditing(!isEditing)} className="p-1.5 text-gray-400 hover:text-white hover:bg-gray-700 rounded-md"><Edit2 size={16} /></button>
-                    <button onClick={() => setShowDeleteModal(true)} className="p-1.5 text-gray-400 hover:text-red-500 hover:bg-gray-700 rounded-md"><Trash2 size={16} /></button>
-                </div>
-            </div>
-        </>
-    );
-}
-
-function HabitTrackerView({ habits, entries }) {
-    const [newHabitName, setNewHabitName] = useState('');
-    const [isAdding, setIsAdding] = useState(false);
-    const [showAnalytics, setShowAnalytics] = useState(false);
-    const userId = auth.currentUser?.uid;
-
-    const handleAddHabit = async (e) => {
-        e.preventDefault();
-        if (!newHabitName.trim() || !userId || !db) return;
-        await addDoc(collection(db, `artifacts/${appId}/users/${userId}/habits`), { name: newHabitName, createdAt: new Date() });
-        setNewHabitName('');
-        setIsAdding(false);
-    };
-    
-    const habitStreaks = useMemo(() => {
-        const streaks = {};
-        habits.forEach(habit => {
-            const habitEntries = entries
-                .filter(e => e.habitId === habit.id && e.completed)
-                .map(e => e.date)
-                .sort((a, b) => new Date(b) - new Date(a));
-            
-            let currentStreak = 0;
-            if (habitEntries.length > 0) {
-                const today = new Date();
-                const todayKey = getLocalDateKey(today);
-                const yesterday = new Date(today);
-                yesterday.setDate(yesterday.getDate() - 1);
-                const yesterdayKey = getLocalDateKey(yesterday);
-
-                if (habitEntries[0] === todayKey || habitEntries[0] === yesterdayKey) {
-                    currentStreak = 1;
-                    for (let i = 0; i < habitEntries.length - 1; i++) {
-                        const current = new Date(habitEntries[i]);
-                        const next = new Date(habitEntries[i+1]);
-                        const diffDays = Math.round((current - next) / (1000 * 60 * 60 * 24));
-                        if (diffDays === 1) {
-                            currentStreak++;
-                        } else {
-                            break;
-                        }
-                    }
-                }
-            }
-            streaks[habit.id] = currentStreak;
-        });
-        return streaks;
-    }, [habits, entries]);
-
-    return (
-        <div className="space-y-6">
-            <div className="flex justify-between items-center">
-                <h1 className="text-4xl font-bold text-white">Habit Tracker</h1>
-                <div className="flex gap-2">
-                    <button onClick={() => setShowAnalytics(!showAnalytics)} className="flex items-center gap-2 bg-indigo-600 hover:bg-indigo-700 px-4 py-2 rounded-md font-semibold transition-colors">
-                        <TrendingUp size={18} /> {showAnalytics ? 'Hide Analytics' : 'Show Analytics'}
-                    </button>
-                    <button onClick={() => setIsAdding(!isAdding)} className="flex items-center gap-2 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded-md font-semibold transition-colors">
-                        <Plus size={18} /> {isAdding ? 'Cancel' : 'New Habit'}
-                    </button>
-                </div>
-            </div>
-
-            {isAdding && (
-                <form onSubmit={handleAddHabit} className="flex gap-2 p-4 bg-gray-800 rounded-lg">
-                    <input type="text" value={newHabitName} onChange={e => setNewHabitName(e.target.value)} placeholder="e.g., Read for 30 minutes" className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                    <button type="submit" className="bg-green-600 hover:bg-green-700 px-4 py-2 rounded-md font-semibold">Save</button>
-                </form>
-            )}
-
-            {showAnalytics && (
-                <div className="bg-gray-800/60 rounded-lg p-6">
-                    <h2 className="text-2xl font-semibold mb-4">Habit Analytics</h2>
-                    <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
-                       {habits.map(habit => <HabitCalendar key={habit.id} habit={habit} entries={entries.filter(e => e.habitId === habit.id)} />)}
-                       {habits.length === 0 && <p className="text-gray-400 md:col-span-3 text-center">No habits to analyze yet.</p>}
-                    </div>
-                </div>
-            )}
-
-            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
-                {habits.length === 0 && !isAdding && (<p className="text-gray-400 md:col-span-3 text-center py-8">No habits defined yet. Add your first one!</p>)}
-                {habits.map(habit => (<HabitDayCard key={habit.id} habit={habit} entries={entries.filter(e => e.habitId === habit.id)} streak={habitStreaks[habit.id] || 0} />))}
-            </div>
-        </div>
-    );
-}
-
-function HabitDayCard({ habit, entries, streak }) {
-    const [isEditing, setIsEditing] = useState(false);
-    const [editedName, setEditedName] = useState(habit.name);
-    const [showDeleteModal, setShowDeleteModal] = useState(false);
-    const userId = auth.currentUser?.uid;
-    const todayKey = getLocalDateKey(new Date());
-    const entry = entries.find(e => e.date === todayKey);
-    const isCompleted = entry ? entry.completed : false;
-
-    const handleHabitToggle = async () => {
-        if (!userId || !db) return;
-        if (entry) {
-            await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/habit_entries`, entry.id), { completed: !isCompleted });
-        } else {
-            await addDoc(collection(db, `artifacts/${appId}/users/${userId}/habit_entries`), { habitId: habit.id, date: todayKey, completed: true });
-        }
-    };
-
-    const handleUpdateHabit = async (e) => {
-        e.preventDefault();
-        if (!editedName.trim() || !userId || !db) return;
-        const habitRef = doc(db, `artifacts/${appId}/users/${userId}/habits`, habit.id);
-        try {
-            await updateDoc(habitRef, { name: editedName });
-            setIsEditing(false);
-        } catch (error) {
-            console.error("Error updating habit:", error);
-        }
-    };
-
-    const handleDeleteHabit = async () => {
-        if (!userId || !db) return;
-        setShowDeleteModal(false);
-        
-        const entriesPath = `artifacts/${appId}/users/${userId}/habit_entries`;
-        const q = query(collection(db, entriesPath), where("habitId", "==", habit.id));
-        
-        try {
-            const querySnapshot = await getDocs(q);
-            const batch = writeBatch(db);
-            querySnapshot.forEach((doc) => {
-                batch.delete(doc.ref);
-            });
-            await batch.commit();
-
-            const habitRef = doc(db, `artifacts/${appId}/users/${userId}/habits`, habit.id);
-            await deleteDoc(habitRef);
-        } catch (error) {
-            console.error("Error deleting habit and its entries:", error);
-        }
-    };
-
-    return (
-        <>
-            <ConfirmModal 
-                isOpen={showDeleteModal} 
-                onClose={() => setShowDeleteModal(false)} 
-                onConfirm={handleDeleteHabit} 
-                title="Delete Habit" 
-                message={`Are you sure you want to delete the habit "${habit.name}"? All its tracked history will also be removed.`} 
-            />
-            <div className="bg-gray-800/60 rounded-lg p-4 flex flex-col justify-between min-h-[160px]">
-                {isEditing ? (
-                    <form onSubmit={handleUpdateHabit} className="flex-grow flex flex-col space-y-2">
-                        <input 
-                            type="text" 
-                            value={editedName} 
-                            onChange={e => setEditedName(e.target.value)}
-                            className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500"
-                            autoFocus
-                        />
-                        <div className="flex gap-2 mt-auto">
-                            <button type="submit" className="flex-1 p-1.5 text-sm bg-green-600 hover:bg-green-700 rounded-md font-semibold">Save</button>
-                            <button type="button" onClick={() => setIsEditing(false)} className="flex-1 p-1.5 text-sm bg-gray-600 hover:bg-gray-700 rounded-md font-semibold">Cancel</button>
-                        </div>
-                    </form>
-                ) : (
-                    <div className="flex-grow flex flex-col">
-                        <div className="flex justify-between items-start">
-                            <span className="font-semibold text-white pr-2">{habit.name}</span>
-                            <div className="flex items-center gap-1 flex-shrink-0">
-                                <button onClick={() => setIsEditing(true)} className="p-1 text-gray-400 hover:text-white rounded-md hover:bg-gray-700"><Edit2 size={16} /></button>
-                                <button onClick={() => setShowDeleteModal(true)} className="p-1 text-gray-400 hover:text-red-400 rounded-md hover:bg-gray-700"><Trash2 size={16} /></button>
-                            </div>
-                        </div>
-                        <div className={`flex items-center gap-1 text-sm mt-2 ${streak > 0 ? 'text-orange-400' : 'text-gray-500'}`}>
-                            <Flame size={16} />
-                            <span>{streak} day streak</span>
-                        </div>
-                    </div>
-                )}
-                
-                <button 
-                    onClick={handleHabitToggle} 
-                    disabled={isEditing}
-                    className={`w-full mt-4 py-2 rounded-md font-semibold transition-colors ${isCompleted ? 'bg-green-600 hover:bg-green-700 text-white' : 'bg-gray-700 hover:bg-gray-600 text-gray-300'} disabled:bg-gray-800 disabled:cursor-not-allowed`}
-                >
-                    {isCompleted ? "Completed Today!" : "Mark as Done"}
-                </button>
-            </div>
-        </>
-    );
-}
-
-function HabitCalendar({ habit, entries }) {
-    const today = new Date();
-    const [date, setDate] = useState(new Date(today.getFullYear(), today.getMonth(), 1));
-
-    const goToPreviousMonth = () => {
-        setDate(currentDate => new Date(currentDate.getFullYear(), currentDate.getMonth() - 1, 1));
-    };
-
-    const goToNextMonth = () => {
-        setDate(currentDate => new Date(currentDate.getFullYear(), currentDate.getMonth() + 1, 1));
-    };
-
-    const completedDates = useMemo(() => new Set(entries.filter(e => e.completed).map(e => e.date)), [entries]);
-
-    const daysInMonth = new Date(date.getFullYear(), date.getMonth() + 1, 0).getDate();
-    const firstDayOfMonth = new Date(date.getFullYear(), date.getMonth(), 1).getDay();
-    const days = Array.from({ length: daysInMonth }, (_, i) => i + 1);
-    const blanks = Array.from({ length: firstDayOfMonth }, (_, i) => i);
-
-    return (
-        <div className="bg-gray-900/50 p-4 rounded-lg">
-            <div className="flex justify-between items-center mb-2">
-                 <button onClick={goToPreviousMonth} className="p-1 rounded-md hover:bg-gray-700">&lt;</button>
-                 <h3 className="font-semibold text-center text-sm">
-                    {habit.name} - {date.toLocaleString('default', { month: 'long' })} {date.getFullYear()}
-                 </h3>
-                 <button onClick={goToNextMonth} className="p-1 rounded-md hover:bg-gray-700">&gt;</button>
-            </div>
-            <div className="grid grid-cols-7 gap-1 text-center text-xs text-gray-400">
-                {['S', 'M', 'T', 'W', 'T', 'F', 'S'].map((d, i) => <div key={i}>{d}</div>)}
-            </div>
-            <div className="grid grid-cols-7 gap-1 mt-2">
-                {blanks.map((b, i) => <div key={`b-${i}`}></div>)}
-                {days.map(d => {
-                    const dateKey = getLocalDateKey(new Date(date.getFullYear(), date.getMonth(), d));
-                    const isCompleted = completedDates.has(dateKey);
-                    const isToday = dateKey === getLocalDateKey(new Date());
-                    return (
-                        <div key={d} className={`w-full aspect-square flex items-center justify-center rounded-full text-xs ${isCompleted ? 'bg-green-500 text-white' : 'bg-gray-700'} ${isToday ? 'ring-2 ring-blue-500' : ''}`}>
-                            {d}
-                        </div>
-                    );
-                })}
-            </div>
-        </div>
-    );
-}
-
-function WeeklyReviewView({ tasks, projects, habits, entries }) {
-    const lastWeek = useMemo(() => {
-        const end = new Date();
-        const start = new Date();
-        start.setDate(start.getDate() - 7);
-        return { start, end };
-    }, []);
-
-    const completedTasks = tasks.filter(t => t.completed && t.completedAt && t.completedAt.toDate() >= lastWeek.start);
-    
-    const habitConsistency = useMemo(() => {
-        if (habits.length === 0) return 0;
-        const last7Days = Array.from({length: 7}, (_, i) => {
-            const d = new Date();
-            d.setDate(d.getDate() - i);
-            return getLocalDateKey(d);
-        });
-        
-        let totalPossible = habits.length * 7;
-        let totalCompleted = 0;
-        
-        last7Days.forEach(dateKey => {
-            habits.forEach(habit => {
-                if (entries.some(e => e.habitId === habit.id && e.date === dateKey && e.completed)) {
-                    totalCompleted++;
-                }
-            });
-        });
-        return totalPossible > 0 ? Math.round((totalCompleted / totalPossible) * 100) : 0;
-    }, [habits, entries]);
-
-    return (
-        <div className="space-y-8">
-            <h1 className="text-4xl font-bold text-white">Weekly Review</h1>
-            <p className="text-gray-400">Summary of your activity from {formatDate(lastWeek.start)} to {formatDate(lastWeek.end)}.</p>
-            
-            <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
-                <div className="bg-gray-800/60 p-6 rounded-lg text-center">
-                    <p className="text-gray-400 text-sm">Tasks Completed</p>
-                    <p className="text-5xl font-bold text-green-400">{completedTasks.length}</p>
-                </div>
-                 <div className="bg-gray-800/60 p-6 rounded-lg text-center">
-                    <p className="text-gray-400 text-sm">Habit Consistency</p>
-                    <p className="text-5xl font-bold text-orange-400">{habitConsistency}%</p>
-                </div>
-            </div>
-
-            <div className="bg-gray-800/60 p-6 rounded-lg">
-                <h2 className="text-2xl font-semibold mb-4">Completed Tasks This Week</h2>
-                {completedTasks.length > 0 ? (
-                    <div className="space-y-2">
-                        {completedTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} isCompact />)}
-                    </div>
-                ) : <p className="text-gray-400">No tasks completed this week. Let's get to it!</p>}
-            </div>
-        </div>
-    );
-}
-
-function DailyReminder() {
-    const [showReminder, setShowReminder] = useState(true);
-    if (!showReminder) return null;
-    return (
-        <div className="bg-blue-900/50 border border-blue-700 rounded-lg p-4 flex items-start gap-4">
-            <Clock size={24} className="text-blue-300 mt-1 flex-shrink-0" />
-            <div className="flex-grow">
-                <h3 className="font-semibold text-blue-200">Daily Reminder</h3>
-                <p className="text-sm text-blue-300">Don't forget to review your goals for the day and plan your tasks. A little planning goes a long way!</p>
-            </div>
-            <button onClick={() => setShowReminder(false)} className="p-1 text-blue-300 hover:text-white"><X size={20} /></button>
-        </div>
-    );
-}
-
-function ConfirmModal({ isOpen, onClose, onConfirm, title, message }) {
-    if (!isOpen) return null;
-    return (
-        <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50">
-            <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-md mx-4">
-                <h2 className="text-2xl font-bold text-white mb-4">{title}</h2>
-                <p className="text-gray-300 mb-6">{message}</p>
-                <div className="flex justify-end gap-4">
-                    <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">Cancel</button>
-                    <button onClick={onConfirm} className="px-4 py-2 rounded-md bg-red-600 hover:bg-red-700 font-semibold text-white transition-colors">Confirm</button>
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function AiContextModal({ isOpen, onClose, onConfirm }) {
-    const [context, setContext] = useState('');
-
-    const handleConfirm = () => {
-        onConfirm(context);
-        setContext('');
-    };
-
-    if (!isOpen) return null;
-
-    return (
-        <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50">
-            <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-lg mx-4">
-                <h2 className="text-2xl font-bold text-white mb-4">Add Extra Context</h2>
-                <p className="text-gray-300 mb-4">Provide any additional details or instructions for the AI to generate more relevant tasks.</p>
-                <textarea
-                    value={context}
-                    onChange={(e) => setContext(e.target.value)}
-                    placeholder="e.g., Focus on the marketing aspects..."
-                    className="w-full h-24 bg-gray-700 border border-gray-600 rounded-md p-2 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
-                />
-                <div className="flex justify-end gap-4 mt-6">
-                    <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">
-                        Cancel
-                    </button>
-                    <button onClick={handleConfirm} className="px-4 py-2 rounded-md bg-purple-600 hover:bg-purple-700 font-semibold text-white transition-colors">
-                        Generate Tasks
-                    </button>
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function GoalPlannerModal({ isOpen, onClose, userId }) {
-    const [goal, setGoal] = useState('');
-    const [isGenerating, setIsGenerating] = useState(false);
-    const [error, setError] = useState('');
-
-    const handleGeneratePlan = async () => {
-        const apiKey = process.env.REACT_APP_GEMINI_API_KEY;
-        if (!apiKey) {
-            setError("Gemini API key is not configured.");
-            return;
-        }
-        if (!goal.trim()) {
-            setError("Please enter a goal.");
-            return;
-        }
-        setIsGenerating(true);
-        setError('');
-
-        const prompt = `You are an expert project planner. A user has a high-level goal: "${goal}". 
-        
-        Your task is to decompose this goal into a series of 2 to 4 smaller, actionable projects. For each project, you must also generate a list of 3 to 5 specific tasks to complete it.
-        
-        The output must be a JSON object. For each project, provide a 'name' and a 'type' (e.g., "Course", "Personal", "Bootcamp"). For each task, provide a 'title' and a 'priority' ('High', 'Medium', or 'Low').`;
-
-        const payload = {
-            contents: [{ role: "user", parts: [{ text: prompt }] }],
-            generationConfig: {
-                responseMimeType: "application/json",
-                responseSchema: {
-                    type: "OBJECT",
-                    properties: {
-                        projects: {
-                            type: "ARRAY",
-                            items: {
-                                type: "OBJECT",
-                                properties: {
-                                    name: { type: "STRING" },
-                                    type: { type: "STRING", enum: ["Course", "Conference", "Seminar", "Bootcamp", "Personal"] },
-                                    tasks: {
-                                        type: "ARRAY",
-                                        items: {
-                                            type: "OBJECT",
-                                            properties: {
-                                                title: { type: "STRING" },
-                                                priority: { type: "STRING", enum: ["High", "Medium", "Low"] }
-                                            },
-                                            required: ["title", "priority"]
-                                        }
-                                    }
-                                },
-                                required: ["name", "type", "tasks"]
-                            }
-                        }
-                    },
-                    required: ["projects"]
-                }
-            }
-        };
-
-        try {
-            const result = await callGeminiWithRetry(payload, apiKey);
-            
-            if (result.candidates && result.candidates[0].content.parts[0].text) {
-                const plan = JSON.parse(result.candidates[0].content.parts[0].text);
-                if (plan.projects && plan.projects.length > 0) {
-                    const batch = writeBatch(db);
-                    
-                    // 1. Create the Goal
-                    const goalRef = doc(collection(db, `artifacts/${appId}/users/${userId}/goals`));
-                    batch.set(goalRef, { name: goal, createdAt: new Date() });
-
-                    // 2. Create Projects and Tasks
-                    plan.projects.forEach(proj => {
-                        const projectRef = doc(collection(db, `artifacts/${appId}/users/${userId}/projects`));
-                        batch.set(projectRef, {
-                            name: proj.name,
-                            type: proj.type,
-                            goalId: goalRef.id,
-                            createdAt: new Date(),
-                            status: 'In Progress',
-                            progress: 0
-                        });
-
-                        proj.tasks.forEach(task => {
-                            const taskRef = doc(collection(db, `artifacts/${appId}/users/${userId}/tasks`));
-                            batch.set(taskRef, {
-                                ...task,
-                                projectId: projectRef.id,
-                                completed: false,
-                                createdAt: new Date(),
-                                dueDate: ''
-                            });
-                        });
-                    });
-
-                    await batch.commit();
-                    setGoal('');
-                    onClose();
-                } else {
-                    throw new Error("The AI did not generate any projects for this goal.");
-                }
-            } else {
-                throw new Error("Received an invalid response from the AI.");
-            }
-        } catch (e) {
-            console.error("AI Goal Planner Error:", e);
-            setError(e.message || "An unexpected error occurred.");
-        } finally {
-            setIsGenerating(false);
-        }
-    };
-
-    if (!isOpen) return null;
-
-    return (
-        <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50">
-            <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-lg mx-4">
-                <div className="flex justify-between items-center mb-4">
-                    <h2 className="text-2xl font-bold text-white">AI Goal Planner</h2>
-                    <button onClick={onClose} className="p-1 text-gray-400 hover:text-white"><X size={24} /></button>
-                </div>
-                <p className="text-gray-300 mb-4">Describe a high-level goal, and the AI will break it down into actionable projects and tasks for you.</p>
-                <textarea
-                    value={goal}
-                    onChange={(e) => setGoal(e.target.value)}
-                    placeholder="e.g., Learn web development in 6 months"
-                    className="w-full h-28 bg-gray-700 border border-gray-600 rounded-md p-3 text-base focus:outline-none focus:ring-2 focus:ring-purple-500"
-                />
-                {error && <p className="text-red-400 text-sm mt-2">{error}</p>}
-                <div className="flex justify-end gap-4 mt-6">
-                    <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">
-                        Cancel
-                    </button>
-                    <button onClick={handleGeneratePlan} disabled={isGenerating} className="px-4 py-2 rounded-md bg-purple-600 hover:bg-purple-700 font-semibold text-white transition-colors flex items-center gap-2 disabled:bg-purple-800 disabled:cursor-not-allowed">
-                        {isGenerating ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <Sparkles size={18} />}
-                        {isGenerating ? 'Generating Plan...' : 'Generate Plan'}
-                    </button>
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function DailyPlannerModal({ isOpen, onClose, plan, isLoading, error, retry }) {
-    if (!isOpen) return null;
-
-    return (
-        <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50 p-4">
-            <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-2xl max-h-[90vh] flex flex-col">
-                <div className="flex justify-between items-center mb-4">
-                    <h2 className="text-2xl font-bold text-white">Your Daily Plan</h2>
-                    <button onClick={onClose} className="p-1 text-gray-400 hover:text-white"><X size={24} /></button>
-                </div>
-                <div className="overflow-y-auto flex-grow pr-2">
-                    {isLoading && (
-                        <div className="flex flex-col items-center justify-center h-64">
-                            <div className="animate-spin rounded-full h-16 w-16 border-t-2 border-b-2 border-blue-500 mb-4"></div>
-                            <p className="text-lg text-gray-300">Your AI assistant is planning your day...</p>
-                        </div>
-                    )}
-                    {error && (
-                        <div className="text-center h-64 flex flex-col justify-center items-center">
-                            <p className="text-red-400 mb-4">Error: {error}</p>
-                            <button onClick={retry} className="px-4 py-2 rounded-md bg-blue-600 hover:bg-blue-700 font-semibold transition-colors">
-                                Try Again
-                            </button>
-                        </div>
-                    )}
-                    {plan && (
-                        <div className="text-gray-300 whitespace-pre-wrap font-mono text-sm leading-relaxed" dangerouslySetInnerHTML={{ __html: plan.replace(/\n/g, '<br />') }}>
-                        </div>
-                    )}
-                </div>
-                <div className="flex justify-end mt-6">
-                     <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">
-                        Close
-                    </button>
-                </div>
-            </div>
-        </div>
-    );
-}
diff --git a/src/App_v1.js b/src/App_v1.js
deleted file mode 100644
index e82d4fb..0000000
--- a/src/App_v1.js
+++ /dev/null
@@ -1,1089 +0,0 @@
-import React, { useState, useEffect, useMemo } from 'react';
-import { initializeApp } from 'firebase/app';
-import { getAuth, onAuthStateChanged, GoogleAuthProvider, signInWithPopup, signOut, createUserWithEmailAndPassword, signInWithEmailAndPassword } from 'firebase/auth';
-import { getFirestore, collection, doc, addDoc, updateDoc, deleteDoc, onSnapshot, query, where, getDocs, writeBatch } from 'firebase/firestore';
-import { Book, Calendar, CheckSquare, Clock, Edit2, Flame, Info, LogOut, Plus, Repeat, Save, Sparkles, Tag, Trash2, TrendingUp, X } from 'lucide-react';
-import { callGeminiWithRetry } from './services/geminiService';
-
-// --- Firebase Configuration ---
-const firebaseConfig = {
-  apiKey: process.env.REACT_APP_FIREBASE_API_KEY,
-  authDomain: process.env.REACT_APP_FIREBASE_AUTH_DOMAIN,
-  projectId: process.env.REACT_APP_FIREBASE_PROJECT_ID,
-  storageBucket: process.env.REACT_APP_FIREBASE_STORAGE_BUCKET,
-  messagingSenderId: process.env.REACT_APP_FIREBASE_MESSAGING_SENDER_ID,
-  appId: process.env.REACT_APP_FIREBASE_APP_ID
-};
-
-const appId = 'my-prod-hub';
-const GOOGLE_CLIENT_ID = process.env.REACT_APP_GOOGLE_CLIENT_ID || "";
-
-// --- Firebase Initialization ---
-let app;
-let auth;
-let db;
-// A simple check to see if the config is placeholder or not
-const isFirebaseConfigured = firebaseConfig.apiKey && firebaseConfig.apiKey !== "YOUR_API_KEY";
-
-if (isFirebaseConfigured) {
-    try {
-        app = initializeApp(firebaseConfig);
-        auth = getAuth(app);
-        db = getFirestore(app);
-    } catch (error) {
-        console.error("Firebase initialization error:", error);
-    }
-}
-
-// --- Helper Functions ---
-const formatDate = (date) => {
-    if (!date) return 'N/A';
-    // Handles both Firestore Timestamps and JS Date objects
-    const d = date instanceof Date ? date : date.toDate();
-    return new Intl.DateTimeFormat('en-US', { year: 'numeric', month: 'short', day: 'numeric' }).format(d);
-};
-
-const formatTime = (date) => {
-    if (!date) return '';
-    const d = new Date(date);
-    // Check if it's an all-day event (time is midnight UTC)
-    if (d.getUTCHours() === 0 && d.getUTCMinutes() === 0 && d.getUTCSeconds() === 0) {
-        return 'All-day';
-    }
-    return new Intl.DateTimeFormat('en-US', { hour: 'numeric', minute: '2-digit', hour12: true }).format(d);
-};
-
-const getLocalDateKey = (date) => {
-    const d = new Date(date);
-    // Adjust for timezone offset to get the correct local date
-    d.setMinutes(d.getMinutes() - d.getTimezoneOffset());
-    return d.toISOString().split('T')[0]; // YYYY-MM-DD
-};
-
-// --- Configuration Error Component ---
-function ConfigurationNeeded({ missingFirebase, missingGoogle }) {
-  return (
-    <div className="flex items-center justify-center h-screen bg-gray-900 text-white p-8">
-      <div className="bg-yellow-900/50 border border-yellow-700 rounded-lg p-8 max-w-2xl text-center">
-        <Info size={48} className="text-yellow-300 mx-auto mb-4" />
-        <h1 className="text-3xl font-bold text-yellow-200 mb-4">Configuration Required</h1>
-        {missingFirebase && <div className="text-left bg-gray-800 p-4 rounded-md mb-4"><p className="text-gray-300 mb-2"><strong>Firebase Config Missing:</strong> Please ensure your Firebase environment variables (REACT_APP_FIREBASE_*) are set correctly in your <code>.env.local</code> file.</p></div>}
-        {missingGoogle && <div className="text-left bg-gray-800 p-4 rounded-md"><p className="text-gray-300 mb-2"><strong>Google Client ID Missing:</strong> Please ensure REACT_APP_GOOGLE_CLIENT_ID is set in your <code>.env.local</code> file to enable Google Calendar sync.</p></div>}
-      </div>
-    </div>
-  );
-}
-
-// --- Login Screen Component ---
-function LoginScreen() {
-    const [email, setEmail] = useState('');
-    const [password, setPassword] = useState('');
-    const [error, setError] = useState('');
-    const [isSigningUp, setIsSigningUp] = useState(false);
-
-    const handleGoogleSignIn = async () => {
-        const provider = new GoogleAuthProvider();
-        try {
-            await signInWithPopup(auth, provider);
-        } catch (error) {
-            setError(error.message);
-            console.error("Google Sign-In Error:", error);
-        }
-    };
-
-    const handleEmailAuth = async (e) => {
-        e.preventDefault();
-        setError('');
-        try {
-            if (isSigningUp) {
-                await createUserWithEmailAndPassword(auth, email, password);
-            } else {
-                await signInWithEmailAndPassword(auth, email, password);
-            }
-        } catch (error) {
-            setError(error.message);
-        }
-    };
-
-    return (
-        <div className="flex items-center justify-center h-screen bg-gray-900 text-white">
-            <div className="w-full max-w-md p-8 space-y-6 bg-gray-800 rounded-lg shadow-lg">
-                <div className="text-center">
-                    <h1 className="text-3xl font-bold text-blue-400">Welcome to ProdHub</h1>
-                    <p className="text-gray-400">Sign in to continue</p>
-                </div>
-                <button onClick={handleGoogleSignIn} className="w-full flex items-center justify-center gap-3 py-3 px-4 bg-red-600 hover:bg-red-700 rounded-md font-semibold transition-colors">
-                    <svg className="w-6 h-6" viewBox="0 0 48 48"><path fill="#EA4335" d="M24 9.5c3.54 0 6.71 1.22 9.21 3.6l6.85-6.85C35.9 2.38 30.47 0 24 0 14.62 0 6.51 5.38 2.56 13.22l7.98 6.19C12.43 13.72 17.74 9.5 24 9.5z"></path><path fill="#4285F4" d="M46.98 24.55c0-1.57-.15-3.09-.38-4.55H24v9.02h12.94c-.58 2.96-2.26 5.48-4.78 7.18l7.73 6c4.51-4.18 7.09-10.36 7.09-17.65z"></path><path fill="#FBBC05" d="M10.53 28.59c-.48-1.45-.76-2.99-.76-4.59s.27-3.14.76-4.59l-7.98-6.19C.92 16.46 0 20.12 0 24c0 3.88.92 7.54 2.56 10.78l7.97-6.19z"></path><path fill="#34A853" d="M24 48c6.48 0 11.93-2.13 15.89-5.81l-7.73-6c-2.15 1.45-4.92 2.3-8.16 2.3-6.26 0-11.57-4.22-13.47-9.91l-7.98 6.19C6.51 42.62 14.62 48 24 48z"></path><path fill="none" d="M0 0h48v48H0z"></path></svg>
-                    Sign in with Google
-                </button>
-                <div className="relative"><div className="absolute inset-0 flex items-center"><div className="w-full border-t border-gray-600"></div></div><div className="relative flex justify-center text-sm"><span className="px-2 bg-gray-800 text-gray-500">Or continue with</span></div></div>
-                <form onSubmit={handleEmailAuth} className="space-y-4">
-                    <input type="email" placeholder="Email" value={email} onChange={e => setEmail(e.target.value)} className="w-full px-4 py-2 bg-gray-700 border border-gray-600 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                    <input type="password" placeholder="Password" value={password} onChange={e => setPassword(e.target.value)} className="w-full px-4 py-2 bg-gray-700 border border-gray-600 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                    {error && <p className="text-red-400 text-sm text-center">{error}</p>}
-                    <button type="submit" className="w-full py-2 px-4 bg-blue-600 hover:bg-blue-700 rounded-md font-semibold transition-colors">{isSigningUp ? 'Sign Up' : 'Sign In'}</button>
-                </form>
-                <p className="text-center text-sm text-gray-400">
-                    {isSigningUp ? 'Already have an account?' : "Don't have an account?"}
-                    <button onClick={() => setIsSigningUp(!isSigningUp)} className="font-medium text-blue-400 hover:underline ml-1">
-                        {isSigningUp ? 'Sign In' : 'Sign Up'}
-                    </button>
-                </p>
-            </div>
-        </div>
-    );
-}
-
-// This is the main content of your application
-function HubApp({ user, handleSignOut }) {
-    const [projects, setProjects] = useState([]);
-    const [tasks, setTasks] = useState([]);
-    const [habits, setHabits] = useState([]);
-    const [habitEntries, setHabitEntries] = useState([]);
-    const [activeView, setActiveView] = useState('dashboard');
-    const [selectedProjectId, setSelectedProjectId] = useState(null);
-    
-    const [syncedEvents, setSyncedEvents] = useState([]);
-    const [tokenClient, setTokenClient] = useState(null);
-    const [isGsiScriptLoaded, setIsGsiScriptLoaded] = useState(false);
-
-    // Effect to load the Google Sign-In script
-    useEffect(() => {
-        const script = document.createElement('script');
-        script.src = 'https://accounts.google.com/gsi/client';
-        script.async = true;
-        script.defer = true;
-        script.onload = () => setIsGsiScriptLoaded(true);
-        document.body.appendChild(script);
-        return () => document.body.removeChild(script);
-    }, []);
-
-    // Effect to initialize the Google token client once the script is loaded
-    useEffect(() => {
-        if (isGsiScriptLoaded && window.google && GOOGLE_CLIENT_ID) {
-            const client = window.google.accounts.oauth2.initTokenClient({ client_id: GOOGLE_CLIENT_ID, scope: 'https://www.googleapis.com/auth/calendar.readonly', callback: '' });
-            setTokenClient(client);
-        }
-    }, [isGsiScriptLoaded]);
-
-    // Effect to subscribe to Firestore data
-    useEffect(() => {
-        if (!user || !db) return;
-        const basePath = `artifacts/${appId}/users/${user.uid}`;
-
-        const projectsQuery = query(collection(db, `${basePath}/projects`));
-        const unsubscribeProjects = onSnapshot(projectsQuery, (snapshot) => {
-            const projectsData = snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }));
-            setProjects(projectsData);
-            // If the selected project is deleted, navigate back to the dashboard
-            if (selectedProjectId && !snapshot.docs.some(doc => doc.id === selectedProjectId)) {
-                setActiveView('dashboard');
-                setSelectedProjectId(null);
-            }
-        });
-
-        const tasksQuery = query(collection(db, `${basePath}/tasks`));
-        const unsubscribeTasks = onSnapshot(tasksQuery, (snapshot) => setTasks(snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }))));
-        
-        const habitsQuery = query(collection(db, `${basePath}/habits`));
-        const unsubscribeHabits = onSnapshot(habitsQuery, (snapshot) => setHabits(snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }))));
-
-        const habitEntriesQuery = query(collection(db, `${basePath}/habit_entries`));
-        const unsubscribeHabitEntries = onSnapshot(habitEntriesQuery, (snapshot) => setHabitEntries(snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }))));
-
-        // Cleanup subscriptions on component unmount
-        return () => {
-            unsubscribeProjects();
-            unsubscribeTasks();
-            unsubscribeHabits();
-            unsubscribeHabitEntries();
-        };
-    }, [user, selectedProjectId]); // Re-run if user changes
-
-    const selectedProject = useMemo(() => projects.find(p => p.id === selectedProjectId), [selectedProjectId, projects]);
-    
-    const handleSetView = (view, projectId = null) => {
-        setActiveView(view);
-        setSelectedProjectId(projectId);
-    };
-
-    return (
-        <div className="bg-gray-900 text-gray-100 min-h-screen font-sans flex">
-            <Sidebar onViewChange={handleSetView} projects={projects} userId={user.uid} handleSignOut={handleSignOut} />
-            <main className="flex-1 p-4 sm:p-6 lg:p-8 overflow-y-auto">
-                {activeView === 'dashboard' && <Dashboard projects={projects} tasks={tasks} onViewChange={handleSetView} />}
-                {activeView === 'project' && selectedProject && <ProjectDetail project={selectedProject} allTasks={tasks} syncedEvents={syncedEvents} />}
-                {activeView === 'all_tasks' && <AllTasksView tasks={tasks} projects={projects} />}
-                {activeView === 'schedule' && <ScheduleView projects={projects} tasks={tasks} syncedEvents={syncedEvents} setSyncedEvents={setSyncedEvents} tokenClient={tokenClient} />}
-                {activeView === 'habit_tracker' && <HabitTrackerView habits={habits} entries={habitEntries} />}
-                {activeView === 'weekly_review' && <WeeklyReviewView tasks={tasks} projects={projects} habits={habits} entries={habitEntries} />}
-            </main>
-        </div>
-    );
-}
-
-// --- Top-Level App Component (Handles Conditional Logic) ---
-export default function App() {
-    const [user, setUser] = useState(null);
-    const [isAuthReady, setIsAuthReady] = useState(false);
-
-    useEffect(() => {
-        if (!auth) {
-            setIsAuthReady(true); // If firebase isn't configured, we can't check auth
-            return;
-        }
-        const unsubscribe = onAuthStateChanged(auth, (currentUser) => {
-            setUser(currentUser);
-            setIsAuthReady(true);
-        });
-        return () => unsubscribe();
-    }, []);
-
-    const handleSignOut = async () => {
-        if(auth) {
-            await signOut(auth);
-        }
-    };
-
-    if (!isFirebaseConfigured || !GOOGLE_CLIENT_ID) {
-        return <ConfigurationNeeded missingFirebase={!isFirebaseConfigured} missingGoogle={!GOOGLE_CLIENT_ID} />;
-    }
-
-    if (!isAuthReady) {
-        return <div className="flex items-center justify-center h-screen bg-gray-900 text-white"><div className="animate-spin rounded-full h-32 w-32 border-t-2 border-b-2 border-blue-500"></div></div>;
-    }
-
-    return user ? <HubApp user={user} handleSignOut={handleSignOut} /> : <LoginScreen />;
-}
-
-// --- Components ---
-function Sidebar({ onViewChange, projects, userId, handleSignOut }) {
-    const [isAddingProject, setIsAddingProject] = useState(false);
-    const [newProjectName, setNewProjectName] = useState('');
-    const [newProjectType, setNewProjectType] = useState('Course');
-
-    const handleAddProject = async (e) => {
-        e.preventDefault();
-        if (!newProjectName.trim() || !userId || !db) return;
-        const project = { name: newProjectName, type: newProjectType, createdAt: new Date(), status: 'In Progress', progress: 0 };
-        try {
-            await addDoc(collection(db, `artifacts/${appId}/users/${userId}/projects`), project);
-            setNewProjectName('');
-            setIsAddingProject(false);
-        } catch (error) {
-            console.error("Error adding project:", error);
-        }
-    };
-
-    return (
-        <aside className="w-64 bg-gray-900/50 border-r border-gray-700/50 p-4 flex flex-col">
-            <div className="space-y-6 flex-1">
-                <h1 className="text-2xl font-bold text-blue-400 flex items-center gap-2"><Book size={24} /> ProdHub</h1>
-                <nav className="space-y-2">
-                    <button onClick={() => onViewChange('dashboard')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><CheckSquare size={20} /> Dashboard</button>
-                    <button onClick={() => onViewChange('weekly_review')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><TrendingUp size={20} /> Weekly Review</button>
-                    <button onClick={() => onViewChange('habit_tracker')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><Repeat size={20} /> Habit Tracker</button>
-                    <button onClick={() => onViewChange('all_tasks')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><CheckSquare size={20} /> All Tasks</button>
-                    <button onClick={() => onViewChange('schedule')} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"><Calendar size={20} /> Schedule</button>
-                    <div className="pt-4">
-                        <h2 className="text-sm font-semibold text-gray-500 px-3 mb-2">Projects</h2>
-                        {projects.map(p => (
-                            <button key={p.id} onClick={() => onViewChange('project', p.id)} className="w-full text-left flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors truncate">
-                               <div className={`w-2 h-2 rounded-full ${p.type === 'Course' ? 'bg-green-400' : p.type === 'Seminar' ? 'bg-purple-400' : 'bg-yellow-400'}`}></div>
-                               {p.name}
-                            </button>
-                        ))}
-                        <button onClick={() => setIsAddingProject(!isAddingProject)} className="w-full flex items-center gap-3 px-3 py-2 mt-2 rounded-md text-blue-400 hover:bg-blue-900/50 transition-colors"><Plus size={20} /> Add Project</button>
-                        {isAddingProject && (
-                            <form onSubmit={handleAddProject} className="p-3 bg-gray-800 rounded-md mt-2 space-y-2">
-                                <input type="text" value={newProjectName} onChange={e => setNewProjectName(e.target.value)} placeholder="Project Name" className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500" />
-                                <select value={newProjectType} onChange={e => setNewProjectType(e.target.value)} className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500">
-                                    <option>Course</option><option>Conference</option><option>Seminar</option><option>Bootcamp</option><option>Personal</option>
-                                </select>
-                                <button type="submit" className="w-full bg-blue-600 hover:bg-blue-700 rounded-md py-1 text-sm font-semibold">Save</button>
-                            </form>
-                        )}
-                    </div>
-                </nav>
-            </div>
-            <button onClick={handleSignOut} className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-400 hover:bg-red-900/50 hover:text-red-300 transition-colors mt-4">
-                <LogOut size={20} /> Sign Out
-            </button>
-        </aside>
-    );
-}
-
-function Dashboard({ projects, tasks, onViewChange }) {
-    const today = new Date();
-    today.setHours(0,0,0,0);
-    const upcomingTasks = tasks.filter(t => !t.completed && t.dueDate).map(t => ({...t, dueDateObj: new Date(t.dueDate)})).filter(t => t.dueDateObj >= today).sort((a, b) => a.dueDateObj - b.dueDateObj).slice(0, 5);
-    const overdueTasks = tasks.filter(t => !t.completed && t.dueDate && new Date(t.dueDate) < today);
-
-    return (
-        <div className="space-y-8">
-            <h1 className="text-4xl font-bold text-white">Dashboard</h1>
-            {overdueTasks.length > 0 && (
-                <div className="bg-red-900/50 border border-red-700 rounded-lg p-4">
-                    <h2 className="text-xl font-semibold text-red-300 mb-3">Overdue Tasks ({overdueTasks.length})</h2>
-                    <div className="space-y-2">{overdueTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} isCompact={true} />)}</div>
-                </div>
-            )}
-            <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
-                <div className="bg-gray-800/60 rounded-lg p-6 space-y-4">
-                    <h2 className="text-2xl font-semibold text-gray-200">Upcoming Deadlines</h2>
-                    {upcomingTasks.length > 0 ? <div className="space-y-3">{upcomingTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} isCompact={true} />)}</div> : <p className="text-gray-400">No upcoming deadlines. Great job!</p>}
-                </div>
-                <div className="bg-gray-800/60 rounded-lg p-6 space-y-4">
-                    <h2 className="text-2xl font-semibold text-gray-200">Projects Overview</h2>
-                    <div className="space-y-4">
-                        {projects.length > 0 ? projects.map(p => (
-                            <div key={p.id} className="cursor-pointer" onClick={() => onViewChange('project', p.id)}>
-                                <div className="flex justify-between items-center mb-1"><span className="font-medium text-gray-300">{p.name}</span><span className="text-sm text-gray-400">{Math.round(p.progress || 0)}%</span></div>
-                                <div className="w-full bg-gray-700 rounded-full h-2.5"><div className="bg-blue-500 h-2.5 rounded-full" style={{ width: `${p.progress || 0}%` }}></div></div>
-                            </div>
-                        )) : <p className="text-gray-400">No projects yet. Add one from the sidebar!</p>}
-                    </div>
-                </div>
-            </div>
-            <DailyReminder />
-        </div>
-    );
-}
-
-function ProjectDetail({ project, allTasks, syncedEvents }) {
-    const [isAddingTask, setIsAddingTask] = useState(false);
-    const [newTask, setNewTask] = useState({ title: '', dueDate: '', priority: 'Medium' });
-    const [editingProject, setEditingProject] = useState(null);
-    const [showDeleteModal, setShowDeleteModal] = useState(null);
-    const [isGenerating, setIsGenerating] = useState(false);
-    const [geminiError, setGeminiError] = useState('');
-    const [showAiContextModal, setShowAiContextModal] = useState(false);
-
-    const userId = auth.currentUser?.uid;
-    const tasks = useMemo(() => allTasks.filter(t => t.projectId === project.id), [allTasks, project.id]);
-
-    // Effect to update project progress when tasks change
-    useEffect(() => {
-        if (!userId || !project || !db) return;
-        const completedTasks = tasks.filter(t => t.completed).length;
-        const totalTasks = tasks.length;
-        const progress = totalTasks > 0 ? (completedTasks / totalTasks) * 100 : 0;
-        if (project.progress !== progress) {
-            const projectRef = doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id);
-            updateDoc(projectRef, { progress });
-        }
-    }, [tasks, project, userId]);
-    
-    const handleAddTask = async (e) => {
-        e.preventDefault();
-        if (!newTask.title.trim() || !userId || !db) return;
-        const task = { ...newTask, projectId: project.id, completed: false, createdAt: new Date() };
-        await addDoc(collection(db, `artifacts/${appId}/users/${userId}/tasks`), task);
-        setNewTask({ title: '', dueDate: '', priority: 'Medium' });
-        setIsAddingTask(false);
-    };
-
-    const handleUpdateProject = async (e) => {
-        e.preventDefault();
-        if (!editingProject.name.trim() || !userId || !db) return;
-        await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id), { name: editingProject.name, type: editingProject.type });
-        setEditingProject(null);
-    };
-    
-    const handleDeleteProject = async () => {
-        if (!userId || !db) return;
-        setShowDeleteModal(null);
-        // Batch delete tasks for efficiency (optional but good practice)
-        for (const task of tasks) {
-            await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id));
-        }
-        await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id));
-    };
-
-    const handleGenerateTasks = async (customContext) => {
-        setShowAiContextModal(false);
-        const apiKey = process.env.REACT_APP_GEMINI_API_KEY;
-        if (!apiKey) {
-            setGeminiError("Gemini API key is not configured. Please add REACT_APP_GEMINI_API_KEY to your .env.local file.");
-            return;
-        }
-        if (!userId || !db) return;
-        setIsGenerating(true);
-        setGeminiError('');
-
-        const projectKeywords = project.name.toLowerCase().split(' ').filter(k => k.length > 2);
-        const relevantEvents = syncedEvents.filter(event => {
-            const eventTitle = event.title.toLowerCase();
-            return projectKeywords.some(keyword => eventTitle.includes(keyword));
-        });
-
-        let calendarContext = "";
-        if (relevantEvents.length > 0) {
-            const eventList = relevantEvents.map(e => `- "${e.title}" on ${formatDate(e.date)}`).join('\n');
-            calendarContext = `For background context, here are some of my upcoming, related events from my Google Calendar:\n${eventList}\n\n`;
-        }
-        
-        const userContext = customContext ? `Your main instruction is: "${customContext}"\n\n` : "";
-
-        const prompt = `You are a project planning assistant. Your primary goal is to generate a list of actionable to-do items based on the user's main instruction. Use the other information as background context.
-        
-        **Main Instruction from User:**
-        ${userContext || "Break down the project into actionable steps."}
-
-        **Background Context:**
-        - Project Name: "${project.name}"
-        - Project Type: "${project.type}"
-        ${calendarContext}
-        
-        Based on the user's main instruction and the background context, generate a list of 5 to 7 to-do items. For each item, provide a title and estimate its difficulty as 'High', 'Medium', or 'Low'. Do not create tasks that are identical to the calendar events, but rather tasks that lead up to them.`;
-        
-        const payload = { contents: [{ role: "user", parts: [{ text: prompt }] }], generationConfig: { responseMimeType: "application/json", responseSchema: { type: "OBJECT", properties: { tasks: { type: "ARRAY", items: { type: "OBJECT", properties: { title: { type: "STRING" }, priority: { type: "STRING", enum: ["High", "Medium", "Low"] } }, required: ["title", "priority"] } } }, required: ["tasks"] } } };
-        try {
-            const result = await callGeminiWithRetry(payload, apiKey);
-            if (result.candidates && result.candidates[0].content.parts[0].text) {
-                const generated = JSON.parse(result.candidates[0].content.parts[0].text);
-                if (generated.tasks && generated.tasks.length > 0) {
-                    for (const task of generated.tasks) {
-                        await addDoc(collection(db, `artifacts/${appId}/users/${userId}/tasks`), { title: task.title, priority: task.priority, projectId: project.id, completed: false, createdAt: new Date(), dueDate: '' });
-                    }
-                }
-            } else { throw new Error("No tasks were generated."); }
-        } catch (error) {
-            console.error("Gemini API error:", error);
-            setGeminiError(error.message || "An error occurred.");
-        } finally {
-            setIsGenerating(false);
-        }
-    };
-
-    return (
-        <div className="space-y-6">
-            <AiContextModal isOpen={showAiContextModal} onClose={() => setShowAiContextModal(false)} onConfirm={handleGenerateTasks} />
-            <ConfirmModal isOpen={showDeleteModal === 'project'} onClose={() => setShowDeleteModal(null)} onConfirm={handleDeleteProject} title="Delete Project" message={`Are you sure you want to delete "${project.name}" and all its tasks?`} />
-            {editingProject ? (
-                <form onSubmit={handleUpdateProject} className="flex items-center gap-4 bg-gray-800 p-4 rounded-lg">
-                    <input type="text" value={editingProject.name} onChange={e => setEditingProject({...editingProject, name: e.target.value})} className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-3 py-2 text-2xl font-bold focus:outline-none focus:ring-2 focus:ring-blue-500" />
-                    <select value={editingProject.type} onChange={e => setEditingProject({...editingProject, type: e.target.value})} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"><option>Course</option><option>Conference</option><option>Seminar</option><option>Bootcamp</option><option>Personal</option></select>
-                    <button type="submit" className="p-2 bg-green-600 hover:bg-green-700 rounded-md"><Save size={20} /></button>
-                    <button onClick={() => setEditingProject(null)} className="p-2 bg-gray-600 hover:bg-gray-700 rounded-md"><X size={20} /></button>
-                </form>
-            ) : (
-                <div className="flex items-center justify-between">
-                    <div className="flex items-center gap-4"><h1 className="text-4xl font-bold text-white">{project.name}</h1><span className="text-sm font-medium bg-blue-900/70 text-blue-300 px-3 py-1 rounded-full">{project.type}</span></div>
-                    <div className="flex items-center gap-2">
-                        <button onClick={() => setEditingProject({...project})} className="p-2 text-gray-400 hover:text-white hover:bg-gray-700 rounded-md"><Edit2 size={20} /></button>
-                        <button onClick={() => setShowDeleteModal('project')} className="p-2 text-gray-400 hover:text-red-500 hover:bg-gray-700 rounded-md"><Trash2 size={20} /></button>
-                    </div>
-                </div>
-            )}
-            <div>
-                <div className="flex justify-between items-center mb-1"><span className="text-sm font-medium text-gray-400">Progress</span><span className="text-sm font-medium text-white">{Math.round(project.progress || 0)}%</span></div>
-                <div className="w-full bg-gray-700 rounded-full h-2.5"><div className="bg-blue-500 h-2.5 rounded-full transition-all duration-500" style={{ width: `${project.progress || 0}%` }}></div></div>
-            </div>
-            <div className="bg-gray-800/60 rounded-lg p-6">
-                <div className="flex flex-wrap gap-4 justify-between items-center mb-4">
-                    <h2 className="text-2xl font-semibold">To-Do List</h2>
-                    <div className="flex gap-2">
-                        <button onClick={() => setShowAiContextModal(true)} disabled={isGenerating} className="flex items-center gap-2 bg-purple-600 hover:bg-purple-700 px-4 py-2 rounded-md font-semibold transition-colors disabled:bg-purple-800 disabled:cursor-not-allowed">
-                            {isGenerating ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <Sparkles size={18} />}
-                            {isGenerating ? 'Generating...' : '✨ Generate Tasks'}
-                        </button>
-                        <button onClick={() => setIsAddingTask(!isAddingTask)} className="flex items-center gap-2 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded-md font-semibold transition-colors"><Plus size={18} /> {isAddingTask ? 'Cancel' : 'Add Task'}</button>
-                    </div>
-                </div>
-                {geminiError && <div className="text-red-400 bg-red-900/50 p-3 rounded-md mb-4 text-sm">{geminiError}</div>}
-                {isAddingTask && (
-                    <form onSubmit={handleAddTask} className="grid grid-cols-1 md:grid-cols-3 gap-4 mb-6 p-4 bg-gray-900/50 rounded-md">
-                        <input type="text" value={newTask.title} onChange={e => setNewTask({...newTask, title: e.target.value})} placeholder="Task title..." className="md:col-span-2 bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                        <div className="grid grid-cols-2 gap-2">
-                           <input type="date" value={newTask.dueDate} onChange={e => setNewTask({...newTask, dueDate: e.target.value})} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500" />
-                           <select value={newTask.priority} onChange={e => setNewTask({...newTask, priority: e.target.value})} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"><option>High</option><option>Medium</option><option>Low</option></select>
-                        </div>
-                        <button type="submit" className="md:col-span-3 w-full bg-green-600 hover:bg-green-700 rounded-md py-2 font-semibold">Save Task</button>
-                    </form>
-                )}
-                <div className="space-y-3">
-                    {tasks.length > 0 ? tasks.sort((a,b) => a.completed - b.completed).map(task => <TaskItem key={task.id} task={task} />) : <p className="text-gray-400 text-center py-4">No tasks for this project yet. Try generating some with AI!</p>}
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function AllTasksView({ tasks, projects }) {
-    const [filter, setFilter] = useState('All');
-    const [sortBy, setSortBy] = useState('dueDate');
-    const filteredAndSortedTasks = useMemo(() => {
-        let filtered = tasks;
-        if (filter === 'Active') filtered = tasks.filter(t => !t.completed);
-        if (filter === 'Completed') filtered = tasks.filter(t => t.completed);
-        return [...filtered].sort((a, b) => {
-            if (sortBy === 'dueDate') return (a.dueDate ? new Date(a.dueDate) : new Date('2999-12-31')) - (b.dueDate ? new Date(b.dueDate) : new Date('2999-12-31'));
-            if (sortBy === 'priority') { const priorityOrder = { 'High': 1, 'Medium': 2, 'Low': 3 }; return priorityOrder[a.priority] - priorityOrder[b.priority]; }
-            if (sortBy === 'project') { const projectA = projects.find(p => p.id === a.projectId)?.name || ''; const projectB = projects.find(p => p.id === b.projectId)?.name || ''; return projectA.localeCompare(projectB); }
-            return 0;
-        });
-    }, [tasks, projects, filter, sortBy]);
-    return (
-        <div className="space-y-6">
-            <h1 className="text-4xl font-bold text-white">All Tasks</h1>
-            <div className="flex flex-wrap gap-4 items-center p-4 bg-gray-800/60 rounded-lg">
-                <div><span className="text-sm font-medium text-gray-400 mr-2">Filter by:</span><select onChange={(e) => setFilter(e.target.value)} value={filter} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-1.5 focus:outline-none focus:ring-2 focus:ring-blue-500"><option>All</option><option>Active</option><option>Completed</option></select></div>
-                <div><span className="text-sm font-medium text-gray-400 mr-2">Sort by:</span><select onChange={(e) => setSortBy(e.target.value)} value={sortBy} className="bg-gray-700 border border-gray-600 rounded-md px-3 py-1.5 focus:outline-none focus:ring-2 focus:ring-blue-500"><option value="dueDate">Due Date</option><option value="priority">Priority</option><option value="project">Project</option></select></div>
-            </div>
-            <div className="space-y-3">{filteredAndSortedTasks.length > 0 ? filteredAndSortedTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} />) : <p className="text-gray-400 text-center py-8">No tasks found.</p>}</div>
-        </div>
-    );
-}
-
-function ScheduleView({ projects, tasks, syncedEvents, setSyncedEvents, tokenClient }) {
-    const [isLoading, setIsLoading] = useState(false);
-    const [error, setError] = useState(null);
-
-    const handleSync = () => {
-        if (tokenClient) {
-            tokenClient.callback = async (tokenResponse) => {
-                if (tokenResponse && tokenResponse.access_token) {
-                    setIsLoading(true);
-                    setError(null);
-                    try {
-                        const startTime = new Date().toISOString();
-                        const response = await fetch(`https://www.googleapis.com/calendar/v3/calendars/primary/events?timeMin=${startTime}&singleEvents=true&orderBy=startTime`, {
-                            headers: { 'Authorization': `Bearer ${tokenResponse.access_token}` },
-                        });
-                        if (!response.ok) throw new Error('Failed to fetch calendar events.');
-                        const data = await response.json();
-                        const formattedEvents = data.items
-                            .filter(item => !(item.summary && item.summary.toLowerCase().includes('birthday')))
-                            .map(item => ({
-                                id: `gcal-${item.id}`,
-                                title: item.summary,
-                                date: item.start.dateTime ? new Date(item.start.dateTime) : new Date(item.start.date),
-                                type: 'Google Calendar',
-                                color: 'bg-red-500'
-                            }));
-                        setSyncedEvents(formattedEvents);
-                    } catch (e) {
-                        setError('Could not fetch events. Please try again.');
-                        console.error(e);
-                    } finally {
-                        setIsLoading(false);
-                    }
-                }
-            };
-            tokenClient.requestAccessToken();
-        } else {
-            setError("Google Auth is not ready. Please wait a moment and try again.");
-        }
-    };
-    
-    const allEvents = useMemo(() => {
-        const today = new Date();
-        today.setHours(0, 0, 0, 0); // Set to start of today for accurate overdue comparison
-
-        const projectEvents = projects.map(p => ({
-            id: `proj-${p.id}`,
-            title: p.name,
-            date: p.deadline ? new Date(p.deadline) : null,
-            type: 'Project Deadline',
-            color: 'bg-purple-500'
-        }));
-
-        const taskEvents = tasks
-            .filter(t => !t.completed) // 1. Filter out completed tasks
-            .map(t => {
-                const dueDate = t.dueDate ? new Date(t.dueDate) : null;
-                const isOverdue = dueDate && dueDate < today; // 2. Check if task is overdue
-                return {
-                    id: `task-${t.id}`,
-                    title: t.title,
-                    date: dueDate,
-                    type: 'Task Deadline',
-                    color: isOverdue ? 'bg-red-700' : 'bg-green-500', // 3. Assign color based on overdue status
-                    isOverdue: isOverdue
-                };
-            });
-
-        return [...projectEvents, ...taskEvents, ...syncedEvents]
-            .filter(e => e.date && !isNaN(e.date))
-            .sort((a, b) => a.date - b.date);
-    }, [projects, tasks, syncedEvents]);
-
-    return (
-        <div className="space-y-6">
-            <div className="flex justify-between items-center">
-                <h1 className="text-4xl font-bold text-white">Schedule</h1>
-                <button onClick={handleSync} disabled={isLoading || !tokenClient} className="flex items-center gap-2 bg-red-600 hover:bg-red-700 px-4 py-2 rounded-md font-semibold transition-colors disabled:bg-red-800 disabled:cursor-not-allowed">
-                    {isLoading ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M8 2v4"/><path d="M16 2v4"/><rect width="18" height="18" x="3" y="4" rx="2"/><path d="M3 10h18"/></svg>}
-                    {isLoading ? 'Syncing...' : (syncedEvents.length > 0 ? 'Refresh Calendar' : 'Sync with Google Calendar')}
-                </button>
-            </div>
-            {error && <div className="text-red-400 bg-red-900/50 p-3 rounded-md text-sm">{error}</div>}
-            <div className="bg-gray-800/60 rounded-lg p-6">
-                <h2 className="text-2xl font-semibold mb-4">Upcoming Deadlines & Events</h2>
-                <div className="space-y-4">
-                    {allEvents.length > 0 ? allEvents.map(event => (
-                        <div key={event.id} className="flex items-center gap-4 p-3 bg-gray-900/50 rounded-md">
-                            <div className="flex flex-col items-center justify-center w-20 text-center">
-                                <span className="text-sm text-gray-400">{event.date.toLocaleString('default', { month: 'short' })}</span>
-                                <span className="text-2xl font-bold">{event.date.getDate()}</span>
-                            </div>
-                            <div className={`w-1.5 h-12 rounded-full ${event.color}`}></div>
-                            <div>
-                                <p className="font-semibold text-gray-200">{event.title}</p>
-                                <p className="text-sm text-gray-400">
-                                    {event.type}
-                                    {event.isOverdue && <span className="font-semibold text-red-400"> (Overdue)</span>}
-                                    {event.type === 'Google Calendar' && ` at ${formatTime(event.date)}`}
-                                </p>
-                            </div>
-                        </div>
-                    )) : <p className="text-gray-400">No scheduled events with deadlines.</p>}
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function TaskItem({ task, projects = [], isCompact = false }) {
-    const [isEditing, setIsEditing] = useState(false);
-    const [editTitle, setEditTitle] = useState(task.title);
-    const [editPriority, setEditPriority] = useState(task.priority || 'Medium');
-    const [showDeleteModal, setShowDeleteModal] = useState(false);
-    const userId = auth.currentUser?.uid;
-
-    const handleToggleComplete = async () => {
-        if (!userId || !db) return;
-        await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id), { completed: !task.completed, completedAt: !task.completed ? new Date() : null });
-    };
-
-    const handleUpdate = async (e) => {
-        e.preventDefault();
-        if (!userId || !editTitle.trim() || !db) return;
-        await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id), { 
-            title: editTitle,
-            priority: editPriority
-        });
-        setIsEditing(false);
-    };
-
-    const handleDelete = async () => {
-        if (!userId || !db) return;
-        await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id));
-        setShowDeleteModal(false);
-    };
-
-    const projectName = projects.find(p => p.id === task.projectId)?.name;
-    const priorityColor = { High: 'text-red-400', Medium: 'text-yellow-400', Low: 'text-green-400' };
-
-    if (isCompact) {
-        return (
-             <div className="flex items-center justify-between text-sm p-2 rounded-md bg-gray-900/30 hover:bg-gray-900/50">
-                <span className={`truncate ${task.completed ? 'line-through text-gray-500' : ''}`}>{task.title}</span>
-                <div className="flex items-center gap-2 text-gray-400">
-                    {task.dueDate && <span>{formatDate(new Date(task.dueDate))}</span>}
-                    {projectName && <span className="text-xs bg-gray-700 px-2 py-0.5 rounded">{projectName}</span>}
-                </div>
-            </div>
-        );
-    }
-
-    return (
-        <>
-            <ConfirmModal isOpen={showDeleteModal} onClose={() => setShowDeleteModal(false)} onConfirm={handleDelete} title="Delete Task" message={`Are you sure you want to delete this task: "${task.title}"?`} />
-            <div className={`p-3 rounded-md transition-colors flex items-start gap-3 ${task.completed ? 'bg-gray-800/50' : 'bg-gray-900/50'}`}>
-                <button onClick={handleToggleComplete} className="mt-1">
-                    <div className={`w-5 h-5 rounded border-2 flex items-center justify-center ${task.completed ? 'bg-blue-500 border-blue-500' : 'border-gray-500'}`}>
-                        {task.completed && <CheckSquare size={16} className="text-white" />}
-                    </div>
-                </button>
-                <div className="flex-grow">
-                    {isEditing ? (
-                        <form onSubmit={handleUpdate} className="flex gap-2 items-center">
-                            <input type="text" value={editTitle} onChange={e => setEditTitle(e.target.value)} className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500" autoFocus />
-                            <select value={editPriority} onChange={e => setEditPriority(e.target.value)} className="bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500">
-                                <option>High</option><option>Medium</option><option>Low</option>
-                            </select>
-                            <button type="submit" className="p-1.5 bg-green-600 hover:bg-green-700 rounded-md"><Save size={16} /></button>
-                        </form>
-                    ) : (
-                        <p className={`text-gray-200 ${task.completed ? 'line-through text-gray-500' : ''}`}>{task.title}</p>
-                    )}
-                    <div className="flex items-center gap-4 text-xs text-gray-400 mt-1">
-                        {task.dueDate && <div className="flex items-center gap-1"><Calendar size={12} /> {formatDate(new Date(task.dueDate))}</div>}
-                        {task.priority && <div className={`flex items-center gap-1 font-semibold ${priorityColor[task.priority]}`}><Tag size={12} /> {task.priority}</div>}
-                        {projectName && <div className="flex items-center gap-1"><Book size={12} /> {projectName}</div>}
-                    </div>
-                </div>
-                <div className="flex items-center gap-1">
-                    <button onClick={() => setIsEditing(!isEditing)} className="p-1.5 text-gray-400 hover:text-white hover:bg-gray-700 rounded-md"><Edit2 size={16} /></button>
-                    <button onClick={() => setShowDeleteModal(true)} className="p-1.5 text-gray-400 hover:text-red-500 hover:bg-gray-700 rounded-md"><Trash2 size={16} /></button>
-                </div>
-            </div>
-        </>
-    );
-}
-
-function HabitTrackerView({ habits, entries }) {
-    const [newHabitName, setNewHabitName] = useState('');
-    const [isAdding, setIsAdding] = useState(false);
-    const [showAnalytics, setShowAnalytics] = useState(false);
-    const userId = auth.currentUser?.uid;
-
-    const handleAddHabit = async (e) => {
-        e.preventDefault();
-        if (!newHabitName.trim() || !userId || !db) return;
-        await addDoc(collection(db, `artifacts/${appId}/users/${userId}/habits`), { name: newHabitName, createdAt: new Date() });
-        setNewHabitName('');
-        setIsAdding(false);
-    };
-    
-    const habitStreaks = useMemo(() => {
-        const streaks = {};
-        habits.forEach(habit => {
-            const habitEntries = entries
-                .filter(e => e.habitId === habit.id && e.completed)
-                .map(e => e.date)
-                .sort((a, b) => new Date(b) - new Date(a));
-            
-            let currentStreak = 0;
-            if (habitEntries.length > 0) {
-                const today = new Date();
-                const todayKey = getLocalDateKey(today);
-                const yesterday = new Date(today);
-                yesterday.setDate(yesterday.getDate() - 1);
-                const yesterdayKey = getLocalDateKey(yesterday);
-
-                if (habitEntries[0] === todayKey || habitEntries[0] === yesterdayKey) {
-                    currentStreak = 1;
-                    for (let i = 0; i < habitEntries.length - 1; i++) {
-                        const current = new Date(habitEntries[i]);
-                        const next = new Date(habitEntries[i+1]);
-                        const diffDays = Math.round((current - next) / (1000 * 60 * 60 * 24));
-                        if (diffDays === 1) {
-                            currentStreak++;
-                        } else {
-                            break;
-                        }
-                    }
-                }
-            }
-            streaks[habit.id] = currentStreak;
-        });
-        return streaks;
-    }, [habits, entries]);
-
-    return (
-        <div className="space-y-6">
-            <div className="flex justify-between items-center">
-                <h1 className="text-4xl font-bold text-white">Habit Tracker</h1>
-                <div className="flex gap-2">
-                    <button onClick={() => setShowAnalytics(!showAnalytics)} className="flex items-center gap-2 bg-indigo-600 hover:bg-indigo-700 px-4 py-2 rounded-md font-semibold transition-colors">
-                        <TrendingUp size={18} /> {showAnalytics ? 'Hide Analytics' : 'Show Analytics'}
-                    </button>
-                    <button onClick={() => setIsAdding(!isAdding)} className="flex items-center gap-2 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded-md font-semibold transition-colors">
-                        <Plus size={18} /> {isAdding ? 'Cancel' : 'New Habit'}
-                    </button>
-                </div>
-            </div>
-
-            {isAdding && (
-                <form onSubmit={handleAddHabit} className="flex gap-2 p-4 bg-gray-800 rounded-lg">
-                    <input type="text" value={newHabitName} onChange={e => setNewHabitName(e.target.value)} placeholder="e.g., Read for 30 minutes" className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500" required />
-                    <button type="submit" className="bg-green-600 hover:bg-green-700 px-4 py-2 rounded-md font-semibold">Save</button>
-                </form>
-            )}
-
-            {showAnalytics && (
-                <div className="bg-gray-800/60 rounded-lg p-6">
-                    <h2 className="text-2xl font-semibold mb-4">Habit Analytics</h2>
-                    <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
-                       {habits.map(habit => <HabitCalendar key={habit.id} habit={habit} entries={entries.filter(e => e.habitId === habit.id)} />)}
-                       {habits.length === 0 && <p className="text-gray-400 md:col-span-3 text-center">No habits to analyze yet.</p>}
-                    </div>
-                </div>
-            )}
-
-            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
-                {habits.length === 0 && !isAdding && (<p className="text-gray-400 md:col-span-3 text-center py-8">No habits defined yet. Add your first one!</p>)}
-                {habits.map(habit => (<HabitDayCard key={habit.id} habit={habit} entries={entries.filter(e => e.habitId === habit.id)} streak={habitStreaks[habit.id] || 0} />))}
-            </div>
-        </div>
-    );
-}
-
-function HabitDayCard({ habit, entries, streak }) {
-    const [isEditing, setIsEditing] = useState(false);
-    const [editedName, setEditedName] = useState(habit.name);
-    const [showDeleteModal, setShowDeleteModal] = useState(false);
-    const userId = auth.currentUser?.uid;
-    const todayKey = getLocalDateKey(new Date());
-    const entry = entries.find(e => e.date === todayKey);
-    const isCompleted = entry ? entry.completed : false;
-
-    const handleHabitToggle = async () => {
-        if (!userId || !db) return;
-        if (entry) {
-            await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/habit_entries`, entry.id), { completed: !isCompleted });
-        } else {
-            await addDoc(collection(db, `artifacts/${appId}/users/${userId}/habit_entries`), { habitId: habit.id, date: todayKey, completed: true });
-        }
-    };
-
-    const handleUpdateHabit = async (e) => {
-        e.preventDefault();
-        if (!editedName.trim() || !userId || !db) return;
-        const habitRef = doc(db, `artifacts/${appId}/users/${userId}/habits`, habit.id);
-        try {
-            await updateDoc(habitRef, { name: editedName });
-            setIsEditing(false);
-        } catch (error) {
-            console.error("Error updating habit:", error);
-        }
-    };
-
-    const handleDeleteHabit = async () => {
-        if (!userId || !db) return;
-        setShowDeleteModal(false);
-        
-        const entriesPath = `artifacts/${appId}/users/${userId}/habit_entries`;
-        const q = query(collection(db, entriesPath), where("habitId", "==", habit.id));
-        
-        try {
-            const querySnapshot = await getDocs(q);
-            const batch = writeBatch(db);
-            querySnapshot.forEach((doc) => {
-                batch.delete(doc.ref);
-            });
-            await batch.commit();
-
-            const habitRef = doc(db, `artifacts/${appId}/users/${userId}/habits`, habit.id);
-            await deleteDoc(habitRef);
-        } catch (error) {
-            console.error("Error deleting habit and its entries:", error);
-        }
-    };
-
-    return (
-        <>
-            <ConfirmModal 
-                isOpen={showDeleteModal} 
-                onClose={() => setShowDeleteModal(false)} 
-                onConfirm={handleDeleteHabit} 
-                title="Delete Habit" 
-                message={`Are you sure you want to delete the habit "${habit.name}"? All its tracked history will also be removed.`} 
-            />
-            <div className="bg-gray-800/60 rounded-lg p-4 flex flex-col justify-between min-h-[160px]">
-                {isEditing ? (
-                    <form onSubmit={handleUpdateHabit} className="flex-grow flex flex-col space-y-2">
-                        <input 
-                            type="text" 
-                            value={editedName} 
-                            onChange={e => setEditedName(e.target.value)}
-                            className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500"
-                            autoFocus
-                        />
-                        <div className="flex gap-2 mt-auto">
-                            <button type="submit" className="flex-1 p-1.5 text-sm bg-green-600 hover:bg-green-700 rounded-md font-semibold">Save</button>
-                            <button type="button" onClick={() => setIsEditing(false)} className="flex-1 p-1.5 text-sm bg-gray-600 hover:bg-gray-700 rounded-md font-semibold">Cancel</button>
-                        </div>
-                    </form>
-                ) : (
-                    <div className="flex-grow flex flex-col">
-                        <div className="flex justify-between items-start">
-                            <span className="font-semibold text-white pr-2">{habit.name}</span>
-                            <div className="flex items-center gap-1 flex-shrink-0">
-                                <button onClick={() => setIsEditing(true)} className="p-1 text-gray-400 hover:text-white rounded-md hover:bg-gray-700"><Edit2 size={16} /></button>
-                                <button onClick={() => setShowDeleteModal(true)} className="p-1 text-gray-400 hover:text-red-400 rounded-md hover:bg-gray-700"><Trash2 size={16} /></button>
-                            </div>
-                        </div>
-                        <div className={`flex items-center gap-1 text-sm mt-2 ${streak > 0 ? 'text-orange-400' : 'text-gray-500'}`}>
-                            <Flame size={16} />
-                            <span>{streak} day streak</span>
-                        </div>
-                    </div>
-                )}
-                
-                <button 
-                    onClick={handleHabitToggle} 
-                    disabled={isEditing}
-                    className={`w-full mt-4 py-2 rounded-md font-semibold transition-colors ${isCompleted ? 'bg-green-600 hover:bg-green-700 text-white' : 'bg-gray-700 hover:bg-gray-600 text-gray-300'} disabled:bg-gray-800 disabled:cursor-not-allowed`}
-                >
-                    {isCompleted ? "Completed Today!" : "Mark as Done"}
-                </button>
-            </div>
-        </>
-    );
-}
-
-function HabitCalendar({ habit, entries }) {
-    const today = new Date();
-    const [date, setDate] = useState(new Date(today.getFullYear(), today.getMonth(), 1));
-
-    const goToPreviousMonth = () => {
-        setDate(currentDate => new Date(currentDate.getFullYear(), currentDate.getMonth() - 1, 1));
-    };
-
-    const goToNextMonth = () => {
-        setDate(currentDate => new Date(currentDate.getFullYear(), currentDate.getMonth() + 1, 1));
-    };
-
-    const completedDates = useMemo(() => new Set(entries.filter(e => e.completed).map(e => e.date)), [entries]);
-
-    const daysInMonth = new Date(date.getFullYear(), date.getMonth() + 1, 0).getDate();
-    const firstDayOfMonth = new Date(date.getFullYear(), date.getMonth(), 1).getDay();
-    const days = Array.from({ length: daysInMonth }, (_, i) => i + 1);
-    const blanks = Array.from({ length: firstDayOfMonth }, (_, i) => i);
-
-    return (
-        <div className="bg-gray-900/50 p-4 rounded-lg">
-            <div className="flex justify-between items-center mb-2">
-                 <button onClick={goToPreviousMonth} className="p-1 rounded-md hover:bg-gray-700">&lt;</button>
-                 <h3 className="font-semibold text-center text-sm">
-                    {habit.name} - {date.toLocaleString('default', { month: 'long' })} {date.getFullYear()}
-                 </h3>
-                 <button onClick={goToNextMonth} className="p-1 rounded-md hover:bg-gray-700">&gt;</button>
-            </div>
-            <div className="grid grid-cols-7 gap-1 text-center text-xs text-gray-400">
-                {['S', 'M', 'T', 'W', 'T', 'F', 'S'].map((d, i) => <div key={i}>{d}</div>)}
-            </div>
-            <div className="grid grid-cols-7 gap-1 mt-2">
-                {blanks.map((b, i) => <div key={`b-${i}`}></div>)}
-                {days.map(d => {
-                    const dateKey = getLocalDateKey(new Date(date.getFullYear(), date.getMonth(), d));
-                    const isCompleted = completedDates.has(dateKey);
-                    const isToday = dateKey === getLocalDateKey(new Date());
-                    return (
-                        <div key={d} className={`w-full aspect-square flex items-center justify-center rounded-full text-xs ${isCompleted ? 'bg-green-500 text-white' : 'bg-gray-700'} ${isToday ? 'ring-2 ring-blue-500' : ''}`}>
-                            {d}
-                        </div>
-                    );
-                })}
-            </div>
-        </div>
-    );
-}
-
-function WeeklyReviewView({ tasks, projects, habits, entries }) {
-    const lastWeek = useMemo(() => {
-        const end = new Date();
-        const start = new Date();
-        start.setDate(start.getDate() - 7);
-        return { start, end };
-    }, []);
-
-    const completedTasks = tasks.filter(t => t.completed && t.completedAt && t.completedAt.toDate() >= lastWeek.start);
-    
-    const habitConsistency = useMemo(() => {
-        if (habits.length === 0) return 0;
-        const last7Days = Array.from({length: 7}, (_, i) => {
-            const d = new Date();
-            d.setDate(d.getDate() - i);
-            return getLocalDateKey(d);
-        });
-        
-        let totalPossible = habits.length * 7;
-        let totalCompleted = 0;
-        
-        last7Days.forEach(dateKey => {
-            habits.forEach(habit => {
-                if (entries.some(e => e.habitId === habit.id && e.date === dateKey && e.completed)) {
-                    totalCompleted++;
-                }
-            });
-        });
-        return totalPossible > 0 ? Math.round((totalCompleted / totalPossible) * 100) : 0;
-    }, [habits, entries]);
-
-    return (
-        <div className="space-y-8">
-            <h1 className="text-4xl font-bold text-white">Weekly Review</h1>
-            <p className="text-gray-400">Summary of your activity from {formatDate(lastWeek.start)} to {formatDate(lastWeek.end)}.</p>
-            
-            <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
-                <div className="bg-gray-800/60 p-6 rounded-lg text-center">
-                    <p className="text-gray-400 text-sm">Tasks Completed</p>
-                    <p className="text-5xl font-bold text-green-400">{completedTasks.length}</p>
-                </div>
-                 <div className="bg-gray-800/60 p-6 rounded-lg text-center">
-                    <p className="text-gray-400 text-sm">Habit Consistency</p>
-                    <p className="text-5xl font-bold text-orange-400">{habitConsistency}%</p>
-                </div>
-            </div>
-
-            <div className="bg-gray-800/60 p-6 rounded-lg">
-                <h2 className="text-2xl font-semibold mb-4">Completed Tasks This Week</h2>
-                {completedTasks.length > 0 ? (
-                    <div className="space-y-2">
-                        {completedTasks.map(task => <TaskItem key={task.id} task={task} projects={projects} isCompact />)}
-                    </div>
-                ) : <p className="text-gray-400">No tasks completed this week. Let's get to it!</p>}
-            </div>
-        </div>
-    );
-}
-
-function DailyReminder() {
-    const [showReminder, setShowReminder] = useState(true);
-    if (!showReminder) return null;
-    return (
-        <div className="bg-blue-900/50 border border-blue-700 rounded-lg p-4 flex items-start gap-4">
-            <Clock size={24} className="text-blue-300 mt-1 flex-shrink-0" />
-            <div className="flex-grow">
-                <h3 className="font-semibold text-blue-200">Daily Reminder</h3>
-                <p className="text-sm text-blue-300">Don't forget to review your goals for the day and plan your tasks. A little planning goes a long way!</p>
-            </div>
-            <button onClick={() => setShowReminder(false)} className="p-1 text-blue-300 hover:text-white"><X size={20} /></button>
-        </div>
-    );
-}
-
-function ConfirmModal({ isOpen, onClose, onConfirm, title, message }) {
-    if (!isOpen) return null;
-    return (
-        <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50">
-            <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-md mx-4">
-                <h2 className="text-2xl font-bold text-white mb-4">{title}</h2>
-                <p className="text-gray-300 mb-6">{message}</p>
-                <div className="flex justify-end gap-4">
-                    <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">Cancel</button>
-                    <button onClick={onConfirm} className="px-4 py-2 rounded-md bg-red-600 hover:bg-red-700 font-semibold text-white transition-colors">Confirm</button>
-                </div>
-            </div>
-        </div>
-    );
-}
-
-function AiContextModal({ isOpen, onClose, onConfirm }) {
-    const [context, setContext] = useState('');
-
-    const handleConfirm = () => {
-        onConfirm(context);
-        setContext('');
-    };
-
-    if (!isOpen) return null;
-
-    return (
-        <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50">
-            <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-lg mx-4">
-                <h2 className="text-2xl font-bold text-white mb-4">Add Extra Context</h2>
-                <p className="text-gray-300 mb-4">Provide any additional details or instructions for the AI to generate more relevant tasks.</p>
-                <textarea
-                    value={context}
-                    onChange={(e) => setContext(e.target.value)}
-                    placeholder="e.g., Focus on the marketing aspects..."
-                    className="w-full h-24 bg-gray-700 border border-gray-600 rounded-md p-2 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
-                />
-                <div className="flex justify-end gap-4 mt-6">
-                    <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">
-                        Cancel
-                    </button>
-                    <button onClick={handleConfirm} className="px-4 py-2 rounded-md bg-purple-600 hover:bg-purple-700 font-semibold text-white transition-colors">
-                        Generate Tasks
-                    </button>
-                </div>
-            </div>
-        </div>
-    );
-}
diff --git a/src/components/auth/LoginScreen.jsx b/src/components/auth/LoginScreen.jsx
new file mode 100644
index 0000000..6e37d10
--- /dev/null
+++ b/src/components/auth/LoginScreen.jsx
@@ -0,0 +1,109 @@
+import React, { useState } from 'react';
+
+export default function LoginScreen({ onGoogleSignIn, onEmailSignIn, onEmailSignUp }) {
+  const [email, setEmail] = useState('');
+  const [password, setPassword] = useState('');
+  const [error, setError] = useState('');
+  const [isSigningUp, setIsSigningUp] = useState(false);
+
+  const handleGoogleSignIn = async () => {
+    try {
+      await onGoogleSignIn();
+    } catch (err) {
+      setError(err.message);
+      console.error('Google Sign-In Error:', err);
+    }
+  };
+
+  const handleEmailAuth = async (e) => {
+    e.preventDefault();
+    setError('');
+    try {
+      if (isSigningUp) {
+        await onEmailSignUp(email, password);
+      } else {
+        await onEmailSignIn(email, password);
+      }
+    } catch (err) {
+      setError(err.message);
+    }
+  };
+
+  return (
+    <div className="flex items-center justify-center h-screen bg-gray-900 text-white">
+      <div className="w-full max-w-md p-8 space-y-6 bg-gray-800 rounded-lg shadow-lg">
+        <div className="text-center">
+          <h1 className="text-3xl font-bold text-blue-400">Welcome to ProdHub</h1>
+          <p className="text-gray-400">Sign in to continue</p>
+        </div>
+        <button
+          onClick={handleGoogleSignIn}
+          className="w-full flex items-center justify-center gap-3 py-3 px-4 bg-red-600 hover:bg-red-700 rounded-md font-semibold transition-colors"
+        >
+          <svg className="w-6 h-6" viewBox="0 0 48 48">
+            <path
+              fill="#EA4335"
+              d="M24 9.5c3.54 0 6.71 1.22 9.21 3.6l6.85-6.85C35.9 2.38 30.47 0 24 0 14.62 0 6.51 5.38 2.56 13.22l7.98 6.19C12.43 13.72 17.74 9.5 24 9.5z"
+            ></path>
+            <path
+              fill="#4285F4"
+              d="M46.98 24.55c0-1.57-.15-3.09-.38-4.55H24v9.02h12.94c-.58 2.96-2.26 5.48-4.78 7.18l7.73 6c4.51-4.18 7.09-10.36 7.09-17.65z"
+            ></path>
+            <path
+              fill="#FBBC05"
+              d="M10.53 28.59c-.48-1.45-.76-2.99-.76-4.59s.27-3.14.76-4.59l-7.98-6.19C.92 16.46 0 20.12 0 24c0 3.88.92 7.54 2.56 10.78l7.97-6.19z"
+            ></path>
+            <path
+              fill="#34A853"
+              d="M24 48c6.48 0 11.93-2.13 15.89-5.81l-7.73-6c-2.15 1.45-4.92 2.3-8.16 2.3-6.26 0-11.57-4.22-13.47-9.91l-7.98 6.19C6.51 42.62 14.62 48 24 48z"
+            ></path>
+            <path fill="none" d="M0 0h48v48H0z"></path>
+          </svg>
+          Sign in with Google
+        </button>
+        <div className="relative">
+          <div className="absolute inset-0 flex items-center">
+            <div className="w-full border-t border-gray-600"></div>
+          </div>
+          <div className="relative flex justify-center text-sm">
+            <span className="px-2 bg-gray-800 text-gray-500">Or continue with</span>
+          </div>
+        </div>
+        <form onSubmit={handleEmailAuth} className="space-y-4">
+          <input
+            type="email"
+            placeholder="Email"
+            value={email}
+            onChange={(e) => setEmail(e.target.value)}
+            className="w-full px-4 py-2 bg-gray-700 border border-gray-600 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500"
+            required
+          />
+          <input
+            type="password"
+            placeholder="Password"
+            value={password}
+            onChange={(e) => setPassword(e.target.value)}
+            className="w-full px-4 py-2 bg-gray-700 border border-gray-600 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500"
+            required
+          />
+          {error && <p className="text-red-400 text-sm text-center">{error}</p>}
+          <button
+            type="submit"
+            className="w-full py-2 px-4 bg-blue-600 hover:bg-blue-700 rounded-md font-semibold transition-colors"
+          >
+            {isSigningUp ? 'Sign Up' : 'Sign In'}
+          </button>
+        </form>
+        <p className="text-center text-sm text-gray-400">
+          {isSigningUp ? 'Already have an account?' : "Don't have an account?"}
+          <button
+            onClick={() => setIsSigningUp(!isSigningUp)}
+            className="font-medium text-blue-400 hover:underline ml-1"
+          >
+            {isSigningUp ? 'Sign In' : 'Sign Up'}
+          </button>
+        </p>
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/layout/ConfigurationNeeded.jsx b/src/components/layout/ConfigurationNeeded.jsx
new file mode 100644
index 0000000..525d50f
--- /dev/null
+++ b/src/components/layout/ConfigurationNeeded.jsx
@@ -0,0 +1,27 @@
+import React from 'react';
+import { Info } from 'lucide-react';
+
+export default function ConfigurationNeeded({ missingFirebase, missingGoogle }) {
+  return (
+    <div className="flex items-center justify-center h-screen bg-gray-900 text-white p-8">
+      <div className="bg-yellow-900/50 border border-yellow-700 rounded-lg p-8 max-w-2xl text-center">
+        <Info size={48} className="text-yellow-300 mx-auto mb-4" />
+        <h1 className="text-3xl font-bold text-yellow-200 mb-4">Configuration Required</h1>
+        {missingFirebase && (
+          <div className="text-left bg-gray-800 p-4 rounded-md mb-4">
+            <p className="text-gray-300 mb-2">
+              <strong>Firebase Config Missing:</strong> Please ensure your Firebase environment variables (REACT_APP_FIREBASE_*) are set correctly in your <code>.env.local</code> file.
+            </p>
+          </div>
+        )}
+        {missingGoogle && (
+          <div className="text-left bg-gray-800 p-4 rounded-md">
+            <p className="text-gray-300 mb-2">
+              <strong>Google Client ID Missing:</strong> Please ensure REACT_APP_GOOGLE_CLIENT_ID is set in your <code>.env.local</code> file to enable Google Calendar sync.
+            </p>
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/modals/AiContextModal.jsx b/src/components/modals/AiContextModal.jsx
new file mode 100644
index 0000000..5e9d285
--- /dev/null
+++ b/src/components/modals/AiContextModal.jsx
@@ -0,0 +1,35 @@
+import React, { useState } from 'react';
+
+export default function AiContextModal({ isOpen, onClose, onConfirm }) {
+  const [context, setContext] = useState('');
+
+  const handleConfirm = () => {
+    onConfirm(context);
+    setContext('');
+  };
+
+  if (!isOpen) return null;
+
+  return (
+    <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50">
+      <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-lg mx-4">
+        <h2 className="text-2xl font-bold text-white mb-4">Add Extra Context</h2>
+        <p className="text-gray-300 mb-4">Provide any additional details or instructions for the AI to generate more relevant tasks.</p>
+        <textarea
+          value={context}
+          onChange={(e) => setContext(e.target.value)}
+          placeholder="e.g., Focus on the marketing aspects..."
+          className="w-full h-24 bg-gray-700 border border-gray-600 rounded-md p-2 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
+        />
+        <div className="flex justify-end gap-4 mt-6">
+          <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">
+            Cancel
+          </button>
+          <button onClick={handleConfirm} className="px-4 py-2 rounded-md bg-purple-600 hover:bg-purple-700 font-semibold text-white transition-colors">
+            Generate Tasks
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/modals/ConfirmModal.jsx b/src/components/modals/ConfirmModal.jsx
new file mode 100644
index 0000000..2f38558
--- /dev/null
+++ b/src/components/modals/ConfirmModal.jsx
@@ -0,0 +1,27 @@
+import React from 'react';
+
+export default function ConfirmModal({ isOpen, onClose, onConfirm, title, message }) {
+  if (!isOpen) return null;
+  return (
+    <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50">
+      <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-md mx-4">
+        <h2 className="text-2xl font-bold text-white mb-4">{title}</h2>
+        <p className="text-gray-300 mb-6">{message}</p>
+        <div className="flex justify-end gap-4">
+          <button
+            onClick={onClose}
+            className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors"
+          >
+            Cancel
+          </button>
+          <button
+            onClick={onConfirm}
+            className="px-4 py-2 rounded-md bg-red-600 hover:bg-red-700 font-semibold text-white transition-colors"
+          >
+            Confirm
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/modals/DailyPlannerModal.jsx b/src/components/modals/DailyPlannerModal.jsx
new file mode 100644
index 0000000..b36ea09
--- /dev/null
+++ b/src/components/modals/DailyPlannerModal.jsx
@@ -0,0 +1,45 @@
+import React from 'react';
+
+export default function DailyPlannerModal({ isOpen, onClose, plan, isLoading, error, retry }) {
+  if (!isOpen) return null;
+
+  return (
+    <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50 p-4">
+      <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-2xl max-h-[90vh] flex flex-col">
+        <div className="flex justify-between items-center mb-4">
+          <h2 className="text-2xl font-bold text-white">Your Daily Plan</h2>
+          <button onClick={onClose} className="p-1 text-gray-400 hover:text-white">
+            <span aria-hidden>X</span>
+          </button>
+        </div>
+        <div className="overflow-y-auto flex-grow pr-2">
+          {isLoading && (
+            <div className="flex flex-col items-center justify-center h-64">
+              <div className="animate-spin rounded-full h-16 w-16 border-t-2 border-b-2 border-blue-500 mb-4"></div>
+              <p className="text-lg text-gray-300">Your AI assistant is planning your day...</p>
+            </div>
+          )}
+          {error && (
+            <div className="text-center h-64 flex flex-col justify-center items-center">
+              <p className="text-red-400 mb-4">Error: {error}</p>
+              <button onClick={retry} className="px-4 py-2 rounded-md bg-blue-600 hover:bg-blue-700 font-semibold transition-colors">
+                Try Again
+              </button>
+            </div>
+          )}
+          {plan && (
+            <div
+              className="text-gray-300 whitespace-pre-wrap font-mono text-sm leading-relaxed"
+              dangerouslySetInnerHTML={{ __html: plan.replace(/\n/g, '<br />') }}
+            ></div>
+          )}
+        </div>
+        <div className="flex justify-end mt-6">
+          <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">
+            Close
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/modals/GoalPlannerModal.jsx b/src/components/modals/GoalPlannerModal.jsx
new file mode 100644
index 0000000..f718d11
--- /dev/null
+++ b/src/components/modals/GoalPlannerModal.jsx
@@ -0,0 +1,152 @@
+import React, { useState } from 'react';
+import { collection, doc, writeBatch } from 'firebase/firestore';
+import { callGeminiWithRetry } from '../../services/geminiService';
+import { GEMINI_API_KEY, appId } from '../../config/env';
+import { db } from '../../config/firebase';
+
+export default function GoalPlannerModal({ isOpen, onClose, userId }) {
+  const [goal, setGoal] = useState('');
+  const [isGenerating, setIsGenerating] = useState(false);
+  const [error, setError] = useState('');
+
+  const handleGeneratePlan = async () => {
+    const apiKey = GEMINI_API_KEY;
+    if (!apiKey) {
+      setError('Gemini API key is not configured.');
+      return;
+    }
+    if (!goal.trim()) {
+      setError('Please enter a goal.');
+      return;
+    }
+    setIsGenerating(true);
+    setError('');
+
+    const prompt = `You are an expert project planner. A user has a high-level goal: "${goal}".
+
+Your task is to decompose this goal into a series of 2 to 4 smaller, actionable projects. For each project, you must also generate a list of 3 to 5 specific tasks to complete it.
+
+The output must be a JSON object. For each project, provide a 'name' and a 'type' (e.g., "Course", "Personal", "Bootcamp"). For each task, provide a 'title' and a 'priority' ('High', 'Medium', or 'Low').`;
+
+    const payload = {
+      contents: [{ role: 'user', parts: [{ text: prompt }] }],
+      generationConfig: {
+        responseMimeType: 'application/json',
+        responseSchema: {
+          type: 'OBJECT',
+          properties: {
+            projects: {
+              type: 'ARRAY',
+              items: {
+                type: 'OBJECT',
+                properties: {
+                  name: { type: 'STRING' },
+                  type: { type: 'STRING', enum: ['Course', 'Conference', 'Seminar', 'Bootcamp', 'Personal'] },
+                  tasks: {
+                    type: 'ARRAY',
+                    items: {
+                      type: 'OBJECT',
+                      properties: {
+                        title: { type: 'STRING' },
+                        priority: { type: 'STRING', enum: ['High', 'Medium', 'Low'] },
+                      },
+                      required: ['title', 'priority'],
+                    },
+                  },
+                },
+                required: ['name', 'type', 'tasks'],
+              },
+            },
+          },
+          required: ['projects'],
+        },
+      },
+    };
+
+    try {
+      const result = await callGeminiWithRetry(payload, apiKey);
+
+      if (result.candidates && result.candidates[0].content.parts[0].text) {
+        const plan = JSON.parse(result.candidates[0].content.parts[0].text);
+        if (plan.projects && plan.projects.length > 0) {
+          const batch = writeBatch(db);
+
+          const goalRef = doc(collection(db, `artifacts/${appId}/users/${userId}/goals`));
+          batch.set(goalRef, { name: goal, createdAt: new Date() });
+
+          plan.projects.forEach((proj) => {
+            const projectRef = doc(collection(db, `artifacts/${appId}/users/${userId}/projects`));
+            batch.set(projectRef, {
+              name: proj.name,
+              type: proj.type,
+              goalId: goalRef.id,
+              createdAt: new Date(),
+              status: 'In Progress',
+              progress: 0,
+            });
+
+            proj.tasks.forEach((task) => {
+              const taskRef = doc(collection(db, `artifacts/${appId}/users/${userId}/tasks`));
+              batch.set(taskRef, {
+                ...task,
+                projectId: projectRef.id,
+                completed: false,
+                createdAt: new Date(),
+                dueDate: '',
+              });
+            });
+          });
+
+          await batch.commit();
+          setGoal('');
+          onClose();
+        } else {
+          throw new Error('The AI did not generate any projects for this goal.');
+        }
+      } else {
+        throw new Error('Received an invalid response from the AI.');
+      }
+    } catch (e) {
+      console.error('AI Goal Planner Error:', e);
+      setError(e.message || 'An unexpected error occurred.');
+    } finally {
+      setIsGenerating(false);
+    }
+  };
+
+  if (!isOpen) return null;
+
+  return (
+    <div className="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center z-50">
+      <div className="bg-gray-800 rounded-lg shadow-xl p-6 w-full max-w-lg mx-4">
+        <div className="flex justify-between items-center mb-4">
+          <h2 className="text-2xl font-bold text-white">AI Goal Planner</h2>
+          <button onClick={onClose} className="p-1 text-gray-400 hover:text-white">
+            <span aria-hidden>X</span>
+          </button>
+        </div>
+        <p className="text-gray-300 mb-4">Describe a high-level goal, and the AI will break it down into actionable projects and tasks for you.</p>
+        <textarea
+          value={goal}
+          onChange={(e) => setGoal(e.target.value)}
+          placeholder="e.g., Learn web development in 6 months"
+          className="w-full h-28 bg-gray-700 border border-gray-600 rounded-md p-3 text-base focus:outline-none focus:ring-2 focus:ring-purple-500"
+        />
+        {error && <p className="text-red-400 text-sm mt-2">{error}</p>}
+        <div className="flex justify-end gap-4 mt-6">
+          <button onClick={onClose} className="px-4 py-2 rounded-md bg-gray-600 hover:bg-gray-700 font-semibold transition-colors">
+            Cancel
+          </button>
+          <button
+            onClick={handleGeneratePlan}
+            disabled={isGenerating}
+            className="px-4 py-2 rounded-md bg-purple-600 hover:bg-purple-700 font-semibold text-white transition-colors flex items-center gap-2 disabled:bg-purple-800 disabled:cursor-not-allowed"
+          >
+            {isGenerating ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <span aria-hidden>✨</span>}
+            {isGenerating ? 'Generating Plan...' : 'Generate Plan'}
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/shared/TaskItem.jsx b/src/components/shared/TaskItem.jsx
new file mode 100644
index 0000000..bbb8cab
--- /dev/null
+++ b/src/components/shared/TaskItem.jsx
@@ -0,0 +1,131 @@
+import React, { useState } from 'react';
+import { Book, Calendar, CheckSquare, Edit2, Save, Tag, Trash2 } from 'lucide-react';
+import { doc, updateDoc, deleteDoc } from 'firebase/firestore';
+import { auth, db } from '../../config/firebase';
+import { appId } from '../../config/env';
+import { formatDate } from '../../utils/datetime';
+import ConfirmModal from '../modals/ConfirmModal';
+
+export default function TaskItem({ task, projects = [], isCompact = false }) {
+  const [isEditing, setIsEditing] = useState(false);
+  const [editTitle, setEditTitle] = useState(task.title);
+  const [editPriority, setEditPriority] = useState(task.priority || 'Medium');
+  const [showDeleteModal, setShowDeleteModal] = useState(false);
+  const userId = auth?.currentUser?.uid;
+
+  const handleToggleComplete = async () => {
+    if (!userId || !db) return;
+    await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id), {
+      completed: !task.completed,
+      completedAt: !task.completed ? new Date() : null,
+    });
+  };
+
+  const handleUpdate = async (e) => {
+    e.preventDefault();
+    if (!userId || !editTitle.trim() || !db) return;
+    await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id), {
+      title: editTitle,
+      priority: editPriority,
+    });
+    setIsEditing(false);
+  };
+
+  const handleDelete = async () => {
+    if (!userId || !db) return;
+    await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id));
+    setShowDeleteModal(false);
+  };
+
+  const projectName = projects.find((p) => p.id === task.projectId)?.name;
+  const priorityColor = { High: 'text-red-400', Medium: 'text-yellow-400', Low: 'text-green-400' };
+
+  if (isCompact) {
+    return (
+      <div className="flex items-center justify-between text-sm p-2 rounded-md bg-gray-900/30 hover:bg-gray-900/50">
+        <span className={`truncate ${task.completed ? 'line-through text-gray-500' : ''}`}>{task.title}</span>
+        <div className="flex items-center gap-2 text-gray-400">
+          {task.dueDate && <span>{formatDate(new Date(task.dueDate))}</span>}
+          {projectName && <span className="text-xs bg-gray-700 px-2 py-0.5 rounded">{projectName}</span>}
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <>
+      <ConfirmModal
+        isOpen={showDeleteModal}
+        onClose={() => setShowDeleteModal(false)}
+        onConfirm={handleDelete}
+        title="Delete Task"
+        message={`Are you sure you want to delete this task: "${task.title}"?`}
+      />
+      <div className={`p-3 rounded-md transition-colors flex items-start gap-3 ${task.completed ? 'bg-gray-800/50' : 'bg-gray-900/50'}`}>
+        <button onClick={handleToggleComplete} className="mt-1">
+          <div className={`w-5 h-5 rounded border-2 flex items-center justify-center ${task.completed ? 'bg-blue-500 border-blue-500' : 'border-gray-500'}`}>
+            {task.completed && <CheckSquare size={16} className="text-white" />}
+          </div>
+        </button>
+        <div className="flex-grow">
+          {isEditing ? (
+            <form onSubmit={handleUpdate} className="flex gap-2 items-center">
+              <input
+                type="text"
+                value={editTitle}
+                onChange={(e) => setEditTitle(e.target.value)}
+                className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500"
+                autoFocus
+              />
+              <select
+                value={editPriority}
+                onChange={(e) => setEditPriority(e.target.value)}
+                className="bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500"
+              >
+                <option>High</option>
+                <option>Medium</option>
+                <option>Low</option>
+              </select>
+              <button type="submit" className="p-1.5 bg-green-600 hover:bg-green-700 rounded-md">
+                <Save size={16} />
+              </button>
+            </form>
+          ) : (
+            <p className={`text-gray-200 ${task.completed ? 'line-through text-gray-500' : ''}`}>{task.title}</p>
+          )}
+          <div className="flex items-center gap-4 text-xs text-gray-400 mt-1">
+            {task.dueDate && (
+              <div className="flex items-center gap-1">
+                <Calendar size={12} /> {formatDate(new Date(task.dueDate))}
+              </div>
+            )}
+            {task.priority && (
+              <div className={`flex items-center gap-1 font-semibold ${priorityColor[task.priority]}`}>
+                <Tag size={12} /> {task.priority}
+              </div>
+            )}
+            {projectName && (
+              <div className="flex items-center gap-1">
+                <Book size={12} /> {projectName}
+              </div>
+            )}
+          </div>
+        </div>
+        <div className="flex items-center gap-1">
+          <button
+            onClick={() => setIsEditing(!isEditing)}
+            className="p-1.5 text-gray-400 hover:text-white hover:bg-gray-700 rounded-md"
+          >
+            <Edit2 size={16} />
+          </button>
+          <button
+            onClick={() => setShowDeleteModal(true)}
+            className="p-1.5 text-gray-400 hover:text-red-500 hover:bg-gray-700 rounded-md"
+          >
+            <Trash2 size={16} />
+          </button>
+        </div>
+      </div>
+    </>
+  );
+}
diff --git a/src/config/env.js b/src/config/env.js
new file mode 100644
index 0000000..71afd13
--- /dev/null
+++ b/src/config/env.js
@@ -0,0 +1,18 @@
+export const appId = 'my-prod-hub';
+
+export const firebaseConfig = {
+  apiKey: process.env.REACT_APP_FIREBASE_API_KEY,
+  authDomain: process.env.REACT_APP_FIREBASE_AUTH_DOMAIN,
+  projectId: process.env.REACT_APP_FIREBASE_PROJECT_ID,
+  storageBucket: process.env.REACT_APP_FIREBASE_STORAGE_BUCKET,
+  messagingSenderId: process.env.REACT_APP_FIREBASE_MESSAGING_SENDER_ID,
+  appId: process.env.REACT_APP_FIREBASE_APP_ID,
+};
+
+export const GOOGLE_CLIENT_ID = process.env.REACT_APP_GOOGLE_CLIENT_ID || '';
+export const GEMINI_API_KEY = process.env.REACT_APP_GEMINI_API_KEY || '';
+export const GEMINI_MODEL = 'gemini-2.5-flash';
+
+export const isFirebaseConfigured = Boolean(
+  firebaseConfig.apiKey && firebaseConfig.apiKey !== 'YOUR_API_KEY'
+);
diff --git a/src/config/firebase.js b/src/config/firebase.js
new file mode 100644
index 0000000..ddff42c
--- /dev/null
+++ b/src/config/firebase.js
@@ -0,0 +1,21 @@
+import { initializeApp } from 'firebase/app';
+import { getAuth } from 'firebase/auth';
+import { getFirestore } from 'firebase/firestore';
+import { firebaseConfig, isFirebaseConfigured } from './env';
+
+let app = null;
+let auth = null;
+let db = null;
+
+if (isFirebaseConfigured) {
+  try {
+    app = initializeApp(firebaseConfig);
+    auth = getAuth(app);
+    db = getFirestore(app);
+  } catch (error) {
+    console.error('Firebase initialization error:', error);
+  }
+}
+
+export { app, auth, db };
+export { isFirebaseConfigured } from './env';
diff --git a/src/contexts/AuthContext.jsx b/src/contexts/AuthContext.jsx
new file mode 100644
index 0000000..e94dbd1
--- /dev/null
+++ b/src/contexts/AuthContext.jsx
@@ -0,0 +1,67 @@
+import React, { createContext, useContext, useEffect, useMemo, useState } from 'react';
+import {
+  GoogleAuthProvider,
+  createUserWithEmailAndPassword,
+  onAuthStateChanged,
+  signInWithEmailAndPassword,
+  signInWithPopup,
+  signOut,
+} from 'firebase/auth';
+import { auth } from '../config/firebase';
+import { isFirebaseConfigured } from '../config/env';
+
+const AuthContext = createContext({
+  user: null,
+  isAuthReady: !isFirebaseConfigured,
+  signInWithGoogle: async () => {},
+  emailSignIn: async () => {},
+  emailSignUp: async () => {},
+  signOutUser: async () => {},
+});
+
+export function AuthProvider({ children }) {
+  const [user, setUser] = useState(null);
+  const [isAuthReady, setIsAuthReady] = useState(!isFirebaseConfigured);
+
+  useEffect(() => {
+    if (!auth) {
+      setIsAuthReady(true);
+      return undefined;
+    }
+    const unsubscribe = onAuthStateChanged(auth, (currentUser) => {
+      setUser(currentUser);
+      setIsAuthReady(true);
+    });
+    return unsubscribe;
+  }, []);
+
+  const signInWithGoogle = async () => {
+    if (!auth) throw new Error('Auth not configured');
+    const provider = new GoogleAuthProvider();
+    await signInWithPopup(auth, provider);
+  };
+
+  const emailSignIn = async (email, password) => {
+    if (!auth) throw new Error('Auth not configured');
+    await signInWithEmailAndPassword(auth, email, password);
+  };
+
+  const emailSignUp = async (email, password) => {
+    if (!auth) throw new Error('Auth not configured');
+    await createUserWithEmailAndPassword(auth, email, password);
+  };
+
+  const signOutUser = async () => {
+    if (!auth) return;
+    await signOut(auth);
+  };
+
+  const value = useMemo(
+    () => ({ user, isAuthReady, signInWithGoogle, emailSignIn, emailSignUp, signOutUser }),
+    [user, isAuthReady]
+  );
+
+  return <AuthContext.Provider value={value}>{children}</AuthContext.Provider>;
+}
+
+export const useAuth = () => useContext(AuthContext);
diff --git a/src/features/dashboard/DailyReminder.jsx b/src/features/dashboard/DailyReminder.jsx
new file mode 100644
index 0000000..56d64ee
--- /dev/null
+++ b/src/features/dashboard/DailyReminder.jsx
@@ -0,0 +1,19 @@
+import React, { useState } from 'react';
+import { Clock, X } from 'lucide-react';
+
+export default function DailyReminder() {
+  const [showReminder, setShowReminder] = useState(true);
+  if (!showReminder) return null;
+  return (
+    <div className="bg-blue-900/50 border border-blue-700 rounded-lg p-4 flex items-start gap-4">
+      <Clock size={24} className="text-blue-300 mt-1 flex-shrink-0" />
+      <div className="flex-grow">
+        <h3 className="font-semibold text-blue-200">Daily Reminder</h3>
+        <p className="text-sm text-blue-300">Don't forget to review your goals for the day and plan your tasks. A little planning goes a long way!</p>
+      </div>
+      <button onClick={() => setShowReminder(false)} className="p-1 text-blue-300 hover:text-white">
+        <X size={20} />
+      </button>
+    </div>
+  );
+}
diff --git a/src/features/dashboard/Dashboard.jsx b/src/features/dashboard/Dashboard.jsx
new file mode 100644
index 0000000..8ecf4b1
--- /dev/null
+++ b/src/features/dashboard/Dashboard.jsx
@@ -0,0 +1,186 @@
+import React, { useMemo, useState } from 'react';
+import { Sparkles } from 'lucide-react';
+import { callGeminiWithRetry } from '../../services/geminiService';
+import { GEMINI_API_KEY } from '../../config/env';
+import { formatTime, getLocalDateKey } from '../../utils/datetime';
+import TaskItem from '../../components/shared/TaskItem';
+import GoalProgress from './GoalProgress';
+import DailyPlannerModal from '../../components/modals/DailyPlannerModal';
+
+export default function Dashboard({ projects, tasks, goals, onViewChange, syncedEvents }) {
+  const [showPlanModal, setShowPlanModal] = useState(false);
+  const [dailyPlan, setDailyPlan] = useState('');
+  const [isPlanning, setIsPlanning] = useState(false);
+  const [planningError, setPlanningError] = useState('');
+
+  const today = new Date();
+  today.setHours(0, 0, 0, 0);
+  const todayKey = getLocalDateKey(new Date());
+
+  const upcomingTasks = tasks
+    .filter((t) => !t.completed && t.dueDate)
+    .map((t) => ({ ...t, dueDateObj: new Date(t.dueDate) }))
+    .filter((t) => t.dueDateObj >= today)
+    .sort((a, b) => a.dueDateObj - b.dueDateObj)
+    .slice(0, 5);
+  const overdueTasks = tasks.filter((t) => !t.completed && t.dueDate && new Date(t.dueDate) < today);
+
+  const { standaloneProjects, goalProjects } = useMemo(() => {
+    const standalone = projects.filter((p) => !p.goalId);
+    const grouped = projects.reduce((acc, project) => {
+      if (project.goalId) {
+        (acc[project.goalId] = acc[project.goalId] || []).push(project);
+      }
+      return acc;
+    }, {});
+    return { standaloneProjects: standalone, goalProjects: grouped };
+  }, [projects]);
+
+  const handlePlanMyDay = async () => {
+    setShowPlanModal(true);
+    setIsPlanning(true);
+    setDailyPlan('');
+    setPlanningError('');
+
+    const apiKey = GEMINI_API_KEY;
+    if (!apiKey) {
+      setPlanningError('Gemini API key is not configured.');
+      setIsPlanning(false);
+      return;
+    }
+
+    const todaysTasks = tasks.filter((t) => !t.completed && t.dueDate === todayKey);
+    const todaysEvents = syncedEvents.filter((e) => getLocalDateKey(e.date) === todayKey);
+
+    let context = `Today is ${new Date().toLocaleDateString('en-US', {
+      weekday: 'long',
+      year: 'numeric',
+      month: 'long',
+      day: 'numeric',
+    })}.\n\n`;
+
+    if (overdueTasks.length > 0) {
+      context +=
+        'Here are the overdue tasks that need urgent attention:\n' +
+        overdueTasks.map((t) => `- ${t.title} (Priority: ${t.priority})`).join('\n') +
+        '\n\n';
+    }
+
+    if (todaysTasks.length > 0) {
+      context +=
+        'Here are the tasks scheduled for today:\n' +
+        todaysTasks.map((t) => `- ${t.title} (Priority: ${t.priority})`).join('\n') +
+        '\n\n';
+    }
+
+    if (todaysEvents.length > 0) {
+      context +=
+        'Here are the fixed appointments from the calendar:\n' +
+        todaysEvents.map((e) => `- ${e.title} at ${formatTime(e.date)}`).join('\n') +
+        '\n\n';
+    } else {
+      context += 'There are no events synced from the calendar for today. You can add them from the Schedule page for a better plan.\n\n';
+    }
+
+    if (overdueTasks.length === 0 && todaysTasks.length === 0 && todaysEvents.length === 0) {
+      setDailyPlan(
+        'You have a clear schedule today! No overdue tasks, today\'s tasks, or calendar events. It\'s a great day to get ahead on a project or start planning your next steps.'
+      );
+      setIsPlanning(false);
+      return;
+    }
+
+    const prompt = `You are a productivity coach. Based on the following information, create a prioritized, motivational, and realistic schedule for the day. Group tasks logically, suggest breaks, and slot tasks around fixed appointments. Start with the most critical items.
+
+${context}
+
+Generate a step-by-step plan.`;
+
+    const payload = { contents: [{ role: 'user', parts: [{ text: prompt }] }] };
+
+    try {
+      const result = await callGeminiWithRetry(payload, apiKey);
+
+      if (result.candidates && result.candidates[0].content.parts[0].text) {
+        setDailyPlan(result.candidates[0].content.parts[0].text);
+      } else {
+        throw new Error('Received an invalid response from the AI.');
+      }
+    } catch (e) {
+      console.error('AI Daily Planner Error:', e);
+      setPlanningError(e.message || 'An unexpected error occurred.');
+    } finally {
+      setIsPlanning(false);
+    }
+  };
+
+  return (
+    <>
+      <DailyPlannerModal
+        isOpen={showPlanModal}
+        onClose={() => setShowPlanModal(false)}
+        plan={dailyPlan}
+        isLoading={isPlanning}
+        error={planningError}
+        retry={handlePlanMyDay}
+      />
+      <div className="space-y-8">
+        <div className="flex flex-wrap gap-4 justify-between items-center">
+          <h1 className="text-4xl font-bold text-white">Dashboard</h1>
+          <button
+            onClick={handlePlanMyDay}
+            disabled={isPlanning}
+            className="flex items-center gap-2 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded-md font-semibold transition-colors disabled:bg-blue-800 disabled:cursor-not-allowed"
+          >
+            {isPlanning ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <Sparkles size={18} />}
+            Plan My Day
+          </button>
+        </div>
+        {overdueTasks.length > 0 && (
+          <div className="bg-red-900/50 border border-red-700 rounded-lg p-4">
+            <h2 className="text-xl font-semibold text-red-300 mb-3">Overdue Tasks ({overdueTasks.length})</h2>
+            <div className="space-y-2">
+              {overdueTasks.map((task) => (
+                <TaskItem key={task.id} task={task} projects={projects} isCompact={true} />
+              ))}
+            </div>
+          </div>
+        )}
+        <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
+          <div className="bg-gray-800/60 rounded-lg p-6 space-y-4">
+            <h2 className="text-2xl font-semibold text-gray-200">Upcoming Deadlines</h2>
+            {upcomingTasks.length > 0 ? (
+              <div className="space-y-3">
+                {upcomingTasks.map((task) => (
+                  <TaskItem key={task.id} task={task} projects={projects} isCompact={true} />
+                ))}
+              </div>
+            ) : (
+              <p className="text-gray-400">No upcoming deadlines. Great job!</p>
+            )}
+          </div>
+          <div className="bg-gray-800/60 rounded-lg p-6 space-y-4">
+            <h2 className="text-2xl font-semibold text-gray-200">Projects Overview</h2>
+            <div className="space-y-4">
+              {goals.map((goal) => (
+                <GoalProgress key={goal.id} goal={goal} projects={goalProjects[goal.id] || []} onViewChange={onViewChange} />
+              ))}
+              {standaloneProjects.map((p) => (
+                <div key={p.id} className="cursor-pointer" onClick={() => onViewChange('project', p.id)}>
+                  <div className="flex justify-between items-center mb-1">
+                    <span className="font-medium text-gray-300">{p.name}</span>
+                    <span className="text-sm text-gray-400">{Math.round(p.progress || 0)}%</span>
+                  </div>
+                  <div className="w-full bg-gray-700 rounded-full h-2.5">
+                    <div className="bg-blue-500 h-2.5 rounded-full" style={{ width: `${p.progress || 0}%` }}></div>
+                  </div>
+                </div>
+              ))}
+              {projects.length === 0 && <p className="text-gray-400">No projects yet. Add one from the sidebar!</p>}
+            </div>
+          </div>
+        </div>
+      </div>
+    </>
+  );
+}
diff --git a/src/features/dashboard/GoalProgress.jsx b/src/features/dashboard/GoalProgress.jsx
new file mode 100644
index 0000000..475ef0c
--- /dev/null
+++ b/src/features/dashboard/GoalProgress.jsx
@@ -0,0 +1,44 @@
+import React, { useMemo, useState } from 'react';
+import { ChevronDown, ChevronRight } from 'lucide-react';
+
+export default function GoalProgress({ goal, projects, onViewChange }) {
+  const [isOpen, setIsOpen] = useState(false);
+
+  const goalProgress = useMemo(() => {
+    if (!projects || projects.length === 0) return 0;
+    const totalProgress = projects.reduce((sum, p) => sum + (p.progress || 0), 0);
+    return totalProgress / projects.length;
+  }, [projects]);
+
+  return (
+    <div className="space-y-2">
+      <button onClick={() => setIsOpen(!isOpen)} className="w-full text-left">
+        <div className="flex justify-between items-center mb-1">
+          <span className="font-semibold text-purple-300 flex items-center gap-2">
+            {isOpen ? <ChevronDown size={16} /> : <ChevronRight size={16} />}
+            {goal.name}
+          </span>
+          <span className="text-sm text-gray-400">{Math.round(goalProgress)}%</span>
+        </div>
+        <div className="w-full bg-gray-700 rounded-full h-2.5">
+          <div className="bg-purple-500 h-2.5 rounded-full" style={{ width: `${goalProgress}%` }}></div>
+        </div>
+      </button>
+      {isOpen && (
+        <div className="pl-6 space-y-3 pt-2">
+          {projects.map((p) => (
+            <div key={p.id} className="cursor-pointer" onClick={() => onViewChange('project', p.id)}>
+              <div className="flex justify-between items-center mb-1 text-sm">
+                <span className="font-medium text-gray-300">{p.name}</span>
+                <span className="text-xs text-gray-400">{Math.round(p.progress || 0)}%</span>
+              </div>
+              <div className="w-full bg-gray-600 rounded-full h-2">
+                <div className="bg-blue-500 h-2 rounded-full" style={{ width: `${p.progress || 0}%` }}></div>
+              </div>
+            </div>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/src/features/habits/HabitTrackerView.jsx b/src/features/habits/HabitTrackerView.jsx
new file mode 100644
index 0000000..3a1ceb7
--- /dev/null
+++ b/src/features/habits/HabitTrackerView.jsx
@@ -0,0 +1,304 @@
+import React, { useMemo, useState } from 'react';
+import { Plus, TrendingUp, Edit2, Trash2 } from 'lucide-react';
+import { addDoc, collection, deleteDoc, doc, getDocs, query, updateDoc, where, writeBatch } from 'firebase/firestore';
+import { auth, db } from '../../config/firebase';
+import { appId } from '../../config/env';
+import { getLocalDateKey } from '../../utils/datetime';
+import ConfirmModal from '../../components/modals/ConfirmModal';
+
+export default function HabitTrackerView({ habits, entries }) {
+  const [newHabitName, setNewHabitName] = useState('');
+  const [isAdding, setIsAdding] = useState(false);
+  const [showAnalytics, setShowAnalytics] = useState(false);
+  const userId = auth?.currentUser?.uid;
+
+  const handleAddHabit = async (e) => {
+    e.preventDefault();
+    if (!newHabitName.trim() || !userId || !db) return;
+    await addDoc(collection(db, `artifacts/${appId}/users/${userId}/habits`), { name: newHabitName, createdAt: new Date() });
+    setNewHabitName('');
+    setIsAdding(false);
+  };
+
+  const habitStreaks = useMemo(() => {
+    const streaks = {};
+    habits.forEach((habit) => {
+      const habitEntries = entries
+        .filter((e) => e.habitId === habit.id && e.completed)
+        .map((e) => e.date)
+        .sort((a, b) => new Date(b) - new Date(a));
+
+      let currentStreak = 0;
+      if (habitEntries.length > 0) {
+        const today = new Date();
+        const todayKey = getLocalDateKey(today);
+        const yesterday = new Date(today);
+        yesterday.setDate(yesterday.getDate() - 1);
+        const yesterdayKey = getLocalDateKey(yesterday);
+
+        if (habitEntries[0] === todayKey || habitEntries[0] === yesterdayKey) {
+          currentStreak = 1;
+          for (let i = 0; i < habitEntries.length - 1; i++) {
+            const current = new Date(habitEntries[i]);
+            const next = new Date(habitEntries[i + 1]);
+            const diffDays = Math.round((current - next) / (1000 * 60 * 60 * 24));
+            if (diffDays === 1) {
+              currentStreak++;
+            } else {
+              break;
+            }
+          }
+        }
+      }
+      streaks[habit.id] = currentStreak;
+    });
+    return streaks;
+  }, [habits, entries]);
+
+  return (
+    <div className="space-y-6">
+      <div className="flex justify-between items-center">
+        <h1 className="text-4xl font-bold text-white">Habit Tracker</h1>
+        <div className="flex gap-2">
+          <button
+            onClick={() => setShowAnalytics(!showAnalytics)}
+            className="flex items-center gap-2 bg-indigo-600 hover:bg-indigo-700 px-4 py-2 rounded-md font-semibold transition-colors"
+          >
+            <TrendingUp size={18} /> {showAnalytics ? 'Hide Analytics' : 'Show Analytics'}
+          </button>
+          <button
+            onClick={() => setIsAdding(!isAdding)}
+            className="flex items-center gap-2 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded-md font-semibold transition-colors"
+          >
+            <Plus size={18} /> {isAdding ? 'Cancel' : 'New Habit'}
+          </button>
+        </div>
+      </div>
+
+      {isAdding && (
+        <form onSubmit={handleAddHabit} className="flex gap-2 p-4 bg-gray-800 rounded-lg">
+          <input
+            type="text"
+            value={newHabitName}
+            onChange={(e) => setNewHabitName(e.target.value)}
+            placeholder="e.g., Read for 30 minutes"
+            className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"
+            required
+          />
+          <button type="submit" className="bg-green-600 hover:bg-green-700 px-4 py-2 rounded-md font-semibold">
+            Save
+          </button>
+        </form>
+      )}
+
+      {showAnalytics && (
+        <div className="bg-gray-800/60 rounded-lg p-6">
+          <h2 className="text-2xl font-semibold mb-4">Habit Analytics</h2>
+          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+            {habits.map((habit) => (
+              <HabitCalendar key={habit.id} habit={habit} entries={entries.filter((e) => e.habitId === habit.id)} />
+            ))}
+            {habits.length === 0 && <p className="text-gray-400 md:col-span-3 text-center">No habits to analyze yet.</p>}
+          </div>
+        </div>
+      )}
+
+      <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+        {habits.length === 0 && !isAdding && (
+          <p className="text-gray-400 md:col-span-3 text-center py-8">No habits defined yet. Add your first one!</p>
+        )}
+        {habits.map((habit) => (
+          <HabitDayCard
+            key={habit.id}
+            habit={habit}
+            entries={entries.filter((e) => e.habitId === habit.id)}
+            streak={habitStreaks[habit.id] || 0}
+          />
+        ))}
+      </div>
+    </div>
+  );
+}
+
+function HabitDayCard({ habit, entries, streak }) {
+  const [isEditing, setIsEditing] = useState(false);
+  const [editedName, setEditedName] = useState(habit.name);
+  const [showDeleteModal, setShowDeleteModal] = useState(false);
+  const userId = auth?.currentUser?.uid;
+  const todayKey = getLocalDateKey(new Date());
+  const entry = entries.find((e) => e.date === todayKey);
+  const isCompleted = entry ? entry.completed : false;
+
+  const handleHabitToggle = async () => {
+    if (!userId || !db) return;
+    if (entry) {
+      await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/habit_entries`, entry.id), { completed: !isCompleted });
+    } else {
+      await addDoc(collection(db, `artifacts/${appId}/users/${userId}/habit_entries`), {
+        habitId: habit.id,
+        date: todayKey,
+        completed: true,
+      });
+    }
+  };
+
+  const handleUpdateHabit = async (e) => {
+    e.preventDefault();
+    if (!editedName.trim() || !userId || !db) return;
+    const habitRef = doc(db, `artifacts/${appId}/users/${userId}/habits`, habit.id);
+    try {
+      await updateDoc(habitRef, { name: editedName });
+      setIsEditing(false);
+    } catch (error) {
+      console.error('Error updating habit:', error);
+    }
+  };
+
+  const handleDeleteHabit = async () => {
+    if (!userId || !db) return;
+    setShowDeleteModal(false);
+
+    const entriesPath = `artifacts/${appId}/users/${userId}/habit_entries`;
+    const q = query(collection(db, entriesPath), where('habitId', '==', habit.id));
+
+    try {
+      const querySnapshot = await getDocs(q);
+      const batch = writeBatch(db);
+      querySnapshot.forEach((docSnap) => {
+        batch.delete(docSnap.ref);
+      });
+      await batch.commit();
+
+      const habitRef = doc(db, `artifacts/${appId}/users/${userId}/habits`, habit.id);
+      await deleteDoc(habitRef);
+    } catch (error) {
+      console.error('Error deleting habit and its entries:', error);
+    }
+  };
+
+  return (
+    <>
+      <ConfirmModal
+        isOpen={showDeleteModal}
+        onClose={() => setShowDeleteModal(false)}
+        onConfirm={handleDeleteHabit}
+        title="Delete Habit"
+        message={`Are you sure you want to delete the habit "${habit.name}"? All its tracked history will also be removed.`}
+      />
+      <div className="bg-gray-800/60 rounded-lg p-4 flex flex-col justify-between min-h-[160px]">
+        {isEditing ? (
+          <form onSubmit={handleUpdateHabit} className="flex-grow flex flex-col space-y-2">
+            <input
+              type="text"
+              value={editedName}
+              onChange={(e) => setEditedName(e.target.value)}
+              className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500"
+              autoFocus
+            />
+            <div className="flex gap-2 mt-auto">
+              <button type="submit" className="flex-1 p-1.5 text-sm bg-green-600 hover:bg-green-700 rounded-md font-semibold">
+                Save
+              </button>
+              <button
+                type="button"
+                onClick={() => setIsEditing(false)}
+                className="flex-1 p-1.5 text-sm bg-gray-600 hover:bg-gray-700 rounded-md font-semibold"
+              >
+                Cancel
+              </button>
+            </div>
+          </form>
+        ) : (
+          <div className="flex-grow flex flex-col">
+            <div className="flex justify-between items-start">
+              <span className="font-semibold text-white pr-2">{habit.name}</span>
+              <div className="flex items-center gap-1 flex-shrink-0">
+                <button onClick={() => setIsEditing(true)} className="p-1 text-gray-400 hover:text-white rounded-md hover:bg-gray-700">
+                  <Edit2 size={16} />
+                </button>
+                <button onClick={() => setShowDeleteModal(true)} className="p-1 text-gray-400 hover:text-red-400 rounded-md hover:bg-gray-700">
+                  <Trash2 size={16} />
+                </button>
+              </div>
+            </div>
+            <div className={`flex items-center gap-1 text-sm mt-2 ${streak > 0 ? 'text-orange-400' : 'text-gray-500'}`}>
+              <TrendingUp size={16} />
+              <span>{streak} day streak</span>
+            </div>
+          </div>
+        )}
+
+        <button
+          onClick={handleHabitToggle}
+          disabled={isEditing}
+          className={`w-full mt-4 py-2 rounded-md font-semibold transition-colors ${
+            isCompleted ? 'bg-green-600 hover:bg-green-700 text-white' : 'bg-gray-700 hover:bg-gray-600 text-gray-300'
+          } disabled:bg-gray-800 disabled:cursor-not-allowed`}
+        >
+          {isCompleted ? 'Completed Today!' : 'Mark as Done'}
+        </button>
+      </div>
+    </>
+  );
+}
+
+function HabitCalendar({ habit, entries }) {
+  const today = new Date();
+  const [date, setDate] = useState(new Date(today.getFullYear(), today.getMonth(), 1));
+
+  const goToPreviousMonth = () => {
+    setDate((currentDate) => new Date(currentDate.getFullYear(), currentDate.getMonth() - 1, 1));
+  };
+
+  const goToNextMonth = () => {
+    setDate((currentDate) => new Date(currentDate.getFullYear(), currentDate.getMonth() + 1, 1));
+  };
+
+  const completedDates = useMemo(() => new Set(entries.filter((e) => e.completed).map((e) => e.date)), [entries]);
+
+  const daysInMonth = new Date(date.getFullYear(), date.getMonth() + 1, 0).getDate();
+  const firstDayOfMonth = new Date(date.getFullYear(), date.getMonth(), 1).getDay();
+  const days = Array.from({ length: daysInMonth }, (_, i) => i + 1);
+  const blanks = Array.from({ length: firstDayOfMonth }, (_, i) => i);
+
+  return (
+    <div className="bg-gray-900/50 p-4 rounded-lg">
+      <div className="flex justify-between items-center mb-2">
+        <button onClick={goToPreviousMonth} className="p-1 rounded-md hover:bg-gray-700">
+          &lt;
+        </button>
+        <h3 className="font-semibold text-center text-sm">
+          {habit.name} - {date.toLocaleString('default', { month: 'long' })} {date.getFullYear()}
+        </h3>
+        <button onClick={goToNextMonth} className="p-1 rounded-md hover:bg-gray-700">
+          &gt;
+        </button>
+      </div>
+      <div className="grid grid-cols-7 gap-1 text-center text-xs text-gray-400">
+        {['S', 'M', 'T', 'W', 'T', 'F', 'S'].map((d, i) => (
+          <div key={i}>{d}</div>
+        ))}
+      </div>
+      <div className="grid grid-cols-7 gap-1 mt-2">
+        {blanks.map((b, i) => (
+          <div key={`b-${i}`}></div>
+        ))}
+        {days.map((d) => {
+          const dateKey = getLocalDateKey(new Date(date.getFullYear(), date.getMonth(), d));
+          const isCompleted = completedDates.has(dateKey);
+          const isToday = dateKey === getLocalDateKey(new Date());
+          return (
+            <div
+              key={d}
+              className={`w-full aspect-square flex items-center justify-center rounded-full text-xs ${
+                isCompleted ? 'bg-green-500 text-white' : 'bg-gray-700'
+              } ${isToday ? 'ring-2 ring-blue-500' : ''}`}
+            >
+              {d}
+            </div>
+          );
+        })}
+      </div>
+    </div>
+  );
+}
diff --git a/src/features/project/ProjectDetail.jsx b/src/features/project/ProjectDetail.jsx
new file mode 100644
index 0000000..6c6c288
--- /dev/null
+++ b/src/features/project/ProjectDetail.jsx
@@ -0,0 +1,337 @@
+import React, { useEffect, useMemo, useState } from 'react';
+import { doc, updateDoc, addDoc, collection, deleteDoc } from 'firebase/firestore';
+import { Edit2, Plus, Save, Sparkles, Trash2, X } from 'lucide-react';
+import { auth, db } from '../../config/firebase';
+import { appId, GEMINI_API_KEY } from '../../config/env';
+import { callGeminiWithRetry } from '../../services/geminiService';
+import TaskItem from '../../components/shared/TaskItem';
+import ConfirmModal from '../../components/modals/ConfirmModal';
+import AiContextModal from '../../components/modals/AiContextModal';
+
+export default function ProjectDetail({ project, allTasks, syncedEvents }) {
+  const [isAddingTask, setIsAddingTask] = useState(false);
+  const [newTask, setNewTask] = useState({ title: '', dueDate: '', priority: 'Medium' });
+  const [sortMode, setSortMode] = useState('deadline');
+  const [editingProject, setEditingProject] = useState(null);
+  const [showDeleteModal, setShowDeleteModal] = useState(null);
+  const [isGenerating, setIsGenerating] = useState(false);
+  const [geminiError, setGeminiError] = useState('');
+  const [showAiContextModal, setShowAiContextModal] = useState(false);
+
+  const userId = auth?.currentUser?.uid;
+  const tasks = useMemo(() => {
+    const priorityOrderHigh = { High: 0, Medium: 1, Low: 2 };
+    const priorityOrderLow = { Low: 0, Medium: 1, High: 2 };
+    const filtered = allTasks.filter((t) => t.projectId === project.id);
+
+    if (sortMode === 'random') {
+      const shuffle = (list) => {
+        const arr = list.slice();
+        for (let i = arr.length - 1; i > 0; i -= 1) {
+          const j = Math.floor(Math.random() * (i + 1));
+          [arr[i], arr[j]] = [arr[j], arr[i]];
+        }
+        return arr;
+      };
+      const incomplete = filtered.filter((t) => !t.completed);
+      const completed = filtered.filter((t) => t.completed);
+      return [...shuffle(incomplete), ...shuffle(completed)];
+    }
+
+    const parseDueDate = (value) => {
+      const ts = Date.parse(value);
+      return Number.isFinite(ts) ? ts : Number.POSITIVE_INFINITY;
+    };
+
+    const sorted = filtered.slice().sort((a, b) => {
+      // Always keep incomplete tasks above completed tasks
+      if (a.completed !== b.completed) return a.completed ? 1 : -1;
+
+      let cmp = 0;
+      switch (sortMode) {
+        case 'priority-high-low':
+          cmp = (priorityOrderHigh[a.priority] ?? 99) - (priorityOrderHigh[b.priority] ?? 99);
+          break;
+        case 'priority-low-high':
+          cmp = (priorityOrderLow[a.priority] ?? 99) - (priorityOrderLow[b.priority] ?? 99);
+          break;
+        case 'deadline':
+          cmp = parseDueDate(a.dueDate) - parseDueDate(b.dueDate);
+          break;
+        default:
+          cmp = 0;
+      }
+      return cmp;
+    });
+
+    return sorted;
+  }, [allTasks, project.id, sortMode]);
+
+  useEffect(() => {
+    if (!userId || !project || !db) return;
+    const completedTasks = tasks.filter((t) => t.completed).length;
+    const totalTasks = tasks.length;
+    const progress = totalTasks > 0 ? (completedTasks / totalTasks) * 100 : 0;
+    if (project.progress !== progress) {
+      const projectRef = doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id);
+      updateDoc(projectRef, { progress });
+    }
+  }, [tasks, project, userId]);
+
+  const handleAddTask = async (e) => {
+    e.preventDefault();
+    if (!newTask.title.trim() || !userId || !db) return;
+    const task = { ...newTask, projectId: project.id, completed: false, createdAt: new Date() };
+    await addDoc(collection(db, `artifacts/${appId}/users/${userId}/tasks`), task);
+    setNewTask({ title: '', dueDate: '', priority: 'Medium' });
+    setIsAddingTask(false);
+  };
+
+  const handleUpdateProject = async (e) => {
+    e.preventDefault();
+    if (!editingProject.name.trim() || !userId || !db) return;
+    await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id), {
+      name: editingProject.name,
+      type: editingProject.type,
+    });
+    setEditingProject(null);
+  };
+
+  const handleDeleteProject = async () => {
+    if (!userId || !db) return;
+    setShowDeleteModal(null);
+    for (const task of tasks) {
+      await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/tasks`, task.id));
+    }
+    await deleteDoc(doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id));
+  };
+
+  const handleGenerateTasks = async (customContext) => {
+    setShowAiContextModal(false);
+    const apiKey = GEMINI_API_KEY;
+    if (!apiKey) {
+      setGeminiError('Gemini API key is not configured. Please add REACT_APP_GEMINI_API_KEY to your .env.local file.');
+      return;
+    }
+    if (!userId || !db) return;
+    setIsGenerating(true);
+    setGeminiError('');
+
+    const projectKeywords = project.name.toLowerCase().split(' ').filter((k) => k.length > 2);
+    const relevantEvents = syncedEvents.filter((event) => {
+      const eventTitle = event.title.toLowerCase();
+      return projectKeywords.some((keyword) => eventTitle.includes(keyword));
+    });
+
+    let calendarContext = '';
+    if (relevantEvents.length > 0) {
+      const eventList = relevantEvents.map((e) => `- "${e.title}" on ${e.date.toDateString()}`).join('\n');
+      calendarContext = `For background context, here are some of my upcoming, related events from my Google Calendar:\n${eventList}\n\n`;
+    }
+
+    const userContext = customContext ? `Your main instruction is: "${customContext}"\n\n` : '';
+
+    const prompt = `You are a project planning assistant. Your primary goal is to generate a list of actionable to-do items based on the user's main instruction. Use the other information as background context.
+
+**Main Instruction from User:**
+${userContext || 'Break down the project into actionable steps.'}
+
+**Background Context:**
+- Project Name: "${project.name}"
+- Project Type: "${project.type}"
+${calendarContext}
+
+Based on the user's main instruction and the background context, generate a list of 5 to 7 to-do items. For each item, provide a title and estimate its difficulty as 'High', 'Medium', or 'Low'. Do not create tasks that are identical to the calendar events, but rather tasks that lead up to them.`;
+
+    const payload = {
+      contents: [{ role: 'user', parts: [{ text: prompt }] }],
+      generationConfig: {
+        responseMimeType: 'application/json',
+        responseSchema: {
+          type: 'OBJECT',
+          properties: {
+            tasks: {
+              type: 'ARRAY',
+              items: {
+                type: 'OBJECT',
+                properties: {
+                  title: { type: 'STRING' },
+                  priority: { type: 'STRING', enum: ['High', 'Medium', 'Low'] },
+                },
+                required: ['title', 'priority'],
+              },
+            },
+          },
+          required: ['tasks'],
+        },
+      },
+    };
+    try {
+      const result = await callGeminiWithRetry(payload, apiKey);
+      if (result.candidates && result.candidates[0].content.parts[0].text) {
+        const generated = JSON.parse(result.candidates[0].content.parts[0].text);
+        if (generated.tasks && generated.tasks.length > 0) {
+          for (const task of generated.tasks) {
+            await addDoc(collection(db, `artifacts/${appId}/users/${userId}/tasks`), {
+              title: task.title,
+              priority: task.priority,
+              projectId: project.id,
+              completed: false,
+              createdAt: new Date(),
+              dueDate: '',
+            });
+          }
+        }
+      } else {
+        throw new Error('No tasks were generated.');
+      }
+    } catch (error) {
+      console.error('Gemini API error:', error);
+      setGeminiError(error.message || 'An error occurred.');
+    } finally {
+      setIsGenerating(false);
+    }
+  };
+
+  return (
+    <div className="space-y-6">
+      <AiContextModal
+        isOpen={showAiContextModal}
+        onClose={() => setShowAiContextModal(false)}
+        onConfirm={handleGenerateTasks}
+      />
+      <ConfirmModal
+        isOpen={showDeleteModal === 'project'}
+        onClose={() => setShowDeleteModal(null)}
+        onConfirm={handleDeleteProject}
+        title="Delete Project"
+        message={`Are you sure you want to delete "${project.name}" and all its tasks?`}
+      />
+      {editingProject ? (
+        <form onSubmit={handleUpdateProject} className="flex items-center gap-4 bg-gray-800 p-4 rounded-lg">
+          <input
+            type="text"
+            value={editingProject.name}
+            onChange={(e) => setEditingProject({ ...editingProject, name: e.target.value })}
+            className="flex-grow bg-gray-700 border border-gray-600 rounded-md px-3 py-2 text-2xl font-bold focus:outline-none focus:ring-2 focus:ring-blue-500"
+          />
+          <select
+            value={editingProject.type}
+            onChange={(e) => setEditingProject({ ...editingProject, type: e.target.value })}
+            className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"
+          >
+            <option>Course</option>
+            <option>Conference</option>
+            <option>Seminar</option>
+            <option>Bootcamp</option>
+            <option>Personal</option>
+          </select>
+          <button type="submit" className="p-2 bg-green-600 hover:bg-green-700 rounded-md">
+            <Save size={20} />
+          </button>
+          <button onClick={() => setEditingProject(null)} className="p-2 bg-gray-600 hover:bg-gray-700 rounded-md">
+            <X size={20} />
+          </button>
+        </form>
+      ) : (
+        <div className="flex items-center justify-between">
+          <div className="flex items-center gap-4">
+            <h1 className="text-4xl font-bold text-white">{project.name}</h1>
+            <span className="text-sm font-medium bg-blue-900/70 text-blue-300 px-3 py-1 rounded-full">
+              {project.type}
+            </span>
+          </div>
+          <div className="flex items-center gap-2">
+            <button onClick={() => setEditingProject({ ...project })} className="p-2 text-gray-400 hover:text-white hover:bg-gray-700 rounded-md">
+              <Edit2 size={20} />
+            </button>
+            <button onClick={() => setShowDeleteModal('project')} className="p-2 text-gray-400 hover:text-red-500 hover:bg-gray-700 rounded-md">
+              <Trash2 size={20} />
+            </button>
+          </div>
+        </div>
+      )}
+      <div>
+        <div className="flex justify-between items-center mb-1">
+          <span className="text-sm font-medium text-gray-400">Progress</span>
+          <span className="text-sm font-medium text-white">{Math.round(project.progress || 0)}%</span>
+        </div>
+        <div className="w-full bg-gray-700 rounded-full h-2.5">
+          <div className="bg-blue-500 h-2.5 rounded-full transition-all duration-500" style={{ width: `${project.progress || 0}%` }}></div>
+        </div>
+      </div>
+      <div className="bg-gray-800/60 rounded-lg p-6">
+        <div className="flex flex-wrap gap-4 justify-between items-center mb-4">
+          <h2 className="text-2xl font-semibold">To-Do List</h2>
+          <div className="flex flex-wrap gap-3 items-center">
+            <label className="text-sm text-gray-300">Sort</label>
+            <select
+              value={sortMode}
+              onChange={(e) => setSortMode(e.target.value)}
+              className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
+            >
+              <option value="deadline">Deadline: Earliest First</option>
+              <option value="priority-low-high">Priority: Low → High</option>
+              <option value="priority-high-low">Priority: High → Low</option>
+              <option value="random">Random</option>
+            </select>
+            <button
+              onClick={() => setShowAiContextModal(true)}
+              disabled={isGenerating}
+              className="flex items-center gap-2 bg-purple-600 hover:bg-purple-700 px-4 py-2 rounded-md font-semibold transition-colors disabled:bg-purple-800 disabled:cursor-not-allowed"
+            >
+              {isGenerating ? <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div> : <Sparkles size={18} />}
+              {isGenerating ? 'Generating...' : '✨ Generate Tasks'}
+            </button>
+            <button
+              onClick={() => setIsAddingTask(!isAddingTask)}
+              className="flex items-center gap-2 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded-md font-semibold transition-colors"
+            >
+              <Plus size={18} /> {isAddingTask ? 'Cancel' : 'Add Task'}
+            </button>
+          </div>
+        </div>
+        {geminiError && <div className="text-red-400 bg-red-900/50 p-3 rounded-md mb-4 text-sm">{geminiError}</div>}
+        {isAddingTask && (
+          <form onSubmit={handleAddTask} className="grid grid-cols-1 md:grid-cols-3 gap-4 mb-6 p-4 bg-gray-900/50 rounded-md">
+            <input
+              type="text"
+              value={newTask.title}
+              onChange={(e) => setNewTask({ ...newTask, title: e.target.value })}
+              placeholder="Task title..."
+              className="md:col-span-2 bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"
+              required
+            />
+            <div className="grid grid-cols-2 gap-2">
+              <input
+                type="date"
+                value={newTask.dueDate}
+                onChange={(e) => setNewTask({ ...newTask, dueDate: e.target.value })}
+                className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"
+              />
+              <select
+                value={newTask.priority}
+                onChange={(e) => setNewTask({ ...newTask, priority: e.target.value })}
+                className="bg-gray-700 border border-gray-600 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"
+              >
+                <option>High</option>
+                <option>Medium</option>
+                <option>Low</option>
+              </select>
+            </div>
+            <button type="submit" className="md:col-span-3 w-full bg-green-600 hover:bg-green-700 rounded-md py-2 font-semibold">
+              Save Task
+            </button>
+          </form>
+        )}
+        <div className="space-y-3">
+          {tasks.length > 0 ? (
+            tasks.map((task) => <TaskItem key={task.id} task={task} />)
+          ) : (
+            <p className="text-gray-400 text-center py-4">No tasks for this project yet. Try generating some with AI!</p>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/src/features/review/WeeklyReviewView.jsx b/src/features/review/WeeklyReviewView.jsx
new file mode 100644
index 0000000..a7d6894
--- /dev/null
+++ b/src/features/review/WeeklyReviewView.jsx
@@ -0,0 +1,66 @@
+import React, { useMemo } from 'react';
+import TaskItem from '../../components/shared/TaskItem';
+import { formatDate, getLocalDateKey } from '../../utils/datetime';
+
+export default function WeeklyReviewView({ tasks, projects, habits, entries }) {
+  const lastWeek = useMemo(() => {
+    const end = new Date();
+    const start = new Date();
+    start.setDate(start.getDate() - 7);
+    return { start, end };
+  }, []);
+
+  const completedTasks = tasks.filter((t) => t.completed && t.completedAt && t.completedAt.toDate() >= lastWeek.start);
+
+  const habitConsistency = useMemo(() => {
+    if (habits.length === 0) return 0;
+    const last7Days = Array.from({ length: 7 }, (_, i) => {
+      const d = new Date();
+      d.setDate(d.getDate() - i);
+      return getLocalDateKey(d);
+    });
+
+    let totalPossible = habits.length * 7;
+    let totalCompleted = 0;
+
+    last7Days.forEach((dateKey) => {
+      habits.forEach((habit) => {
+        if (entries.some((e) => e.habitId === habit.id && e.date === dateKey && e.completed)) {
+          totalCompleted++;
+        }
+      });
+    });
+    return totalPossible > 0 ? Math.round((totalCompleted / totalPossible) * 100) : 0;
+  }, [habits, entries]);
+
+  return (
+    <div className="space-y-8">
+      <h1 className="text-4xl font-bold text-white">Weekly Review</h1>
+      <p className="text-gray-400">Summary of your activity from {formatDate(lastWeek.start)} to {formatDate(lastWeek.end)}.</p>
+
+      <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
+        <div className="bg-gray-800/60 p-6 rounded-lg text-center">
+          <p className="text-gray-400 text-sm">Tasks Completed</p>
+          <p className="text-5xl font-bold text-green-400">{completedTasks.length}</p>
+        </div>
+        <div className="bg-gray-800/60 p-6 rounded-lg text-center">
+          <p className="text-gray-400 text-sm">Habit Consistency</p>
+          <p className="text-5xl font-bold text-orange-400">{habitConsistency}%</p>
+        </div>
+      </div>
+
+      <div className="bg-gray-800/60 p-6 rounded-lg">
+        <h2 className="text-2xl font-semibold mb-4">Completed Tasks This Week</h2>
+        {completedTasks.length > 0 ? (
+          <div className="space-y-2">
+            {completedTasks.map((task) => (
+              <TaskItem key={task.id} task={task} projects={projects} isCompact />
+            ))}
+          </div>
+        ) : (
+          <p className="text-gray-400">No tasks completed this week. Let's get to it!</p>
+        )}
+      </div>
+    </div>
+  );
+}
diff --git a/src/features/schedule/ScheduleView.jsx b/src/features/schedule/ScheduleView.jsx
new file mode 100644
index 0000000..43fb244
--- /dev/null
+++ b/src/features/schedule/ScheduleView.jsx
@@ -0,0 +1,125 @@
+import React, { useMemo, useState } from 'react';
+import { formatTime } from '../../utils/datetime';
+import { fetchCalendarEvents } from '../../services/googleCalendar';
+
+export default function ScheduleView({ projects, tasks, syncedEvents, setSyncedEvents, tokenClient }) {
+  const [isLoading, setIsLoading] = useState(false);
+  const [error, setError] = useState(null);
+
+  const handleSync = () => {
+    if (tokenClient) {
+      tokenClient.callback = async (tokenResponse) => {
+        if (tokenResponse && tokenResponse.access_token) {
+          setIsLoading(true);
+          setError(null);
+          try {
+            const formattedEvents = await fetchCalendarEvents(tokenResponse.access_token);
+            setSyncedEvents(formattedEvents);
+          } catch (e) {
+            setError('Could not fetch events. Please try again.');
+            console.error(e);
+          } finally {
+            setIsLoading(false);
+          }
+        }
+      };
+      tokenClient.requestAccessToken();
+    } else {
+      setError('Google Auth is not ready. Please wait a moment and try again.');
+    }
+  };
+
+  const allEvents = useMemo(() => {
+    const today = new Date();
+    today.setHours(0, 0, 0, 0);
+
+    const projectEvents = projects.map((p) => ({
+      id: `proj-${p.id}`,
+      title: p.name,
+      date: p.deadline ? new Date(p.deadline) : null,
+      type: 'Project Deadline',
+      color: 'bg-purple-500',
+    }));
+
+    const taskEvents = tasks
+      .filter((t) => !t.completed)
+      .map((t) => {
+        const dueDate = t.dueDate ? new Date(t.dueDate) : null;
+        const isOverdue = dueDate && dueDate < today;
+        return {
+          id: `task-${t.id}`,
+          title: t.title,
+          date: dueDate,
+          type: 'Task Deadline',
+          color: isOverdue ? 'bg-red-700' : 'bg-green-500',
+          isOverdue,
+        };
+      });
+
+    return [...projectEvents, ...taskEvents, ...syncedEvents]
+      .filter((e) => e.date && !isNaN(e.date))
+      .sort((a, b) => a.date - b.date);
+  }, [projects, tasks, syncedEvents]);
+
+  return (
+    <div className="space-y-6">
+      <div className="flex justify-between items-center">
+        <h1 className="text-4xl font-bold text-white">Schedule</h1>
+        <button
+          onClick={handleSync}
+          disabled={isLoading || !tokenClient}
+          className="flex items-center gap-2 bg-red-600 hover:bg-red-700 px-4 py-2 rounded-md font-semibold transition-colors disabled:bg-red-800 disabled:cursor-not-allowed"
+        >
+          {isLoading ? (
+            <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div>
+          ) : (
+            <svg
+              xmlns="http://www.w3.org/2000/svg"
+              width="20"
+              height="20"
+              viewBox="0 0 24 24"
+              fill="none"
+              stroke="currentColor"
+              strokeWidth="2"
+              strokeLinecap="round"
+              strokeLinejoin="round"
+            >
+              <path d="M8 2v4" />
+              <path d="M16 2v4" />
+              <rect width="18" height="18" x="3" y="4" rx="2" />
+              <path d="M3 10h18" />
+            </svg>
+          )}
+          {isLoading ? 'Syncing...' : syncedEvents.length > 0 ? 'Refresh Calendar' : 'Sync with Google Calendar'}
+        </button>
+      </div>
+      {error && <div className="text-red-400 bg-red-900/50 p-3 rounded-md text-sm">{error}</div>}
+      <div className="bg-gray-800/60 rounded-lg p-6">
+        <h2 className="text-2xl font-semibold mb-4">Upcoming Deadlines & Events</h2>
+        <div className="space-y-4">
+          {allEvents.length > 0 ? (
+            allEvents.map((event) => (
+              <div key={event.id} className="flex items-center gap-4 p-3 bg-gray-900/50 rounded-md">
+                <div className="flex flex-col items-center justify-center w-20 text-center">
+                  <span className="text-sm text-gray-400">{event.date.toLocaleString('default', { month: 'short' })}</span>
+                  <span className="text-2xl font-bold">{event.date.getDate()}</span>
+                </div>
+                <div className={`w-1.5 h-12 rounded-full ${event.color}`}></div>
+                <div>
+                  <p className="font-semibold text-gray-200">{event.title}</p>
+                  <p className="text-sm text-gray-400">
+                    {event.type}
+                    {event.isOverdue && <span className="font-semibold text-red-400"> (Overdue)</span>}
+                    {event.type === 'Google Calendar' && ` at ${formatTime(event.date)}`}
+                  </p>
+                </div>
+              </div>
+            ))
+          ) : (
+            <p className="text-gray-400">No scheduled events with deadlines.</p>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/src/features/sidebar/Sidebar.jsx b/src/features/sidebar/Sidebar.jsx
new file mode 100644
index 0000000..75ea433
--- /dev/null
+++ b/src/features/sidebar/Sidebar.jsx
@@ -0,0 +1,264 @@
+import React, { useMemo, useState } from 'react';
+import { Book, Calendar, CheckSquare, ChevronDown, ChevronRight, Edit2, LogOut, Plus, Repeat, Save, Sparkles, Trash2, TrendingUp } from 'lucide-react';
+import { collection, doc, addDoc, updateDoc, writeBatch, getDocs, query, where } from 'firebase/firestore';
+import { db } from '../../config/firebase';
+import { appId } from '../../config/env';
+import GoalPlannerModal from '../../components/modals/GoalPlannerModal';
+import ConfirmModal from '../../components/modals/ConfirmModal';
+
+export default function Sidebar({ onViewChange, projects, goals, userId, handleSignOut }) {
+  const [isAddingProject, setIsAddingProject] = useState(false);
+  const [newProjectName, setNewProjectName] = useState('');
+  const [newProjectType, setNewProjectType] = useState('Course');
+  const [showGoalModal, setShowGoalModal] = useState(false);
+
+  const handleAddProject = async (e) => {
+    e.preventDefault();
+    if (!newProjectName.trim() || !userId || !db) return;
+    const project = {
+      name: newProjectName,
+      type: newProjectType,
+      createdAt: new Date(),
+      status: 'In Progress',
+      progress: 0,
+      goalId: null,
+    };
+    try {
+      await addDoc(collection(db, `artifacts/${appId}/users/${userId}/projects`), project);
+      setNewProjectName('');
+      setIsAddingProject(false);
+    } catch (error) {
+      console.error('Error adding project:', error);
+    }
+  };
+
+  const { standaloneProjects, goalProjects } = useMemo(() => {
+    const standalone = projects.filter((p) => !p.goalId);
+    const grouped = projects.reduce((acc, project) => {
+      if (project.goalId) {
+        (acc[project.goalId] = acc[project.goalId] || []).push(project);
+      }
+      return acc;
+    }, {});
+    return { standaloneProjects: standalone, goalProjects: grouped };
+  }, [projects]);
+
+  return (
+    <>
+      <GoalPlannerModal isOpen={showGoalModal} onClose={() => setShowGoalModal(false)} userId={userId} />
+      <aside className="w-64 bg-gray-900/50 border-r border-gray-700/50 p-4 flex flex-col">
+        <div className="space-y-6 flex-1 overflow-y-auto">
+          <h1 className="text-2xl font-bold text-blue-400 flex items-center gap-2">
+            <Book size={24} /> ProdHub
+          </h1>
+          <nav className="space-y-2">
+            <button
+              onClick={() => onViewChange('dashboard')}
+              className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"
+            >
+              <CheckSquare size={20} /> Dashboard
+            </button>
+            <button
+              onClick={() => onViewChange('weekly_review')}
+              className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"
+            >
+              <TrendingUp size={20} /> Weekly Review
+            </button>
+            <button
+              onClick={() => onViewChange('habit_tracker')}
+              className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"
+            >
+              <Repeat size={20} /> Habit Tracker
+            </button>
+            <button
+              onClick={() => onViewChange('all_tasks')}
+              className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"
+            >
+              <CheckSquare size={20} /> All Tasks
+            </button>
+            <button
+              onClick={() => onViewChange('schedule')}
+              className="w-full flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors"
+            >
+              <Calendar size={20} /> Schedule
+            </button>
+
+            <div className="pt-4">
+              <h2 className="text-sm font-semibold text-gray-500 px-3 mb-2">Goals</h2>
+              <button
+                onClick={() => setShowGoalModal(true)}
+                className="w-full flex items-center gap-3 px-3 py-2 mt-2 rounded-md text-purple-400 hover:bg-purple-900/50 transition-colors"
+              >
+                <Sparkles size={20} /> AI Goal Planner
+              </button>
+              {goals.map((goal) => (
+                <GoalDropdown
+                  key={goal.id}
+                  goal={goal}
+                  projects={goalProjects[goal.id] || []}
+                  onViewChange={onViewChange}
+                  userId={userId}
+                />
+              ))}
+            </div>
+
+            <div className="pt-4">
+              <h2 className="text-sm font-semibold text-gray-500 px-3 mb-2">Projects</h2>
+              {standaloneProjects.map((p) => (
+                <button
+                  key={p.id}
+                  onClick={() => onViewChange('project', p.id)}
+                  className="w-full text-left flex items-center gap-3 px-3 py-2 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors truncate"
+                >
+                  <div
+                    className={`w-2 h-2 rounded-full ${
+                      p.type === 'Course'
+                        ? 'bg-green-400'
+                        : p.type === 'Seminar'
+                        ? 'bg-purple-400'
+                        : 'bg-yellow-400'
+                    }`}
+                  ></div>
+                  {p.name}
+                </button>
+              ))}
+              <button
+                onClick={() => setIsAddingProject(!isAddingProject)}
+                className="w-full flex items-center gap-3 px-3 py-2 mt-2 rounded-md text-blue-400 hover:bg-blue-900/50 transition-colors"
+              >
+                <Plus size={20} /> Add Project
+              </button>
+              {isAddingProject && (
+                <form onSubmit={handleAddProject} className="p-3 bg-gray-800 rounded-md mt-2 space-y-2">
+                  <input
+                    type="text"
+                    value={newProjectName}
+                    onChange={(e) => setNewProjectName(e.target.value)}
+                    placeholder="Project Name"
+                    className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
+                  />
+                  <select
+                    value={newProjectType}
+                    onChange={(e) => setNewProjectType(e.target.value)}
+                    className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
+                  >
+                    <option>Course</option>
+                    <option>Conference</option>
+                    <option>Seminar</option>
+                    <option>Bootcamp</option>
+                    <option>Personal</option>
+                  </select>
+                  <button type="submit" className="w-full bg-blue-600 hover:bg-blue-700 rounded-md py-1 text-sm font-semibold">
+                    Save
+                  </button>
+                </form>
+              )}
+            </div>
+          </nav>
+        </div>
+        <button
+          onClick={handleSignOut}
+          className="w-full flex-shrink-0 flex items-center gap-3 px-3 py-2 rounded-md text-gray-400 hover:bg-red-900/50 hover:text-red-300 transition-colors mt-4"
+        >
+          <LogOut size={20} /> Sign Out
+        </button>
+      </aside>
+    </>
+  );
+}
+
+function GoalDropdown({ goal, projects, onViewChange, userId }) {
+  const [isOpen, setIsOpen] = useState(true);
+  const [isEditing, setIsEditing] = useState(false);
+  const [editedName, setEditedName] = useState(goal.name);
+  const [showDeleteModal, setShowDeleteModal] = useState(false);
+
+  const handleUpdate = async (e) => {
+    e.preventDefault();
+    if (!editedName.trim()) return;
+    await updateDoc(doc(db, `artifacts/${appId}/users/${userId}/goals`, goal.id), { name: editedName });
+    setIsEditing(false);
+  };
+
+  const handleDelete = async () => {
+    if (!userId || !db) return;
+    setShowDeleteModal(false);
+    const batch = writeBatch(db);
+
+    batch.delete(doc(db, `artifacts/${appId}/users/${userId}/goals`, goal.id));
+
+    for (const project of projects) {
+      batch.delete(doc(db, `artifacts/${appId}/users/${userId}/projects`, project.id));
+      const tasksQuery = query(
+        collection(db, `artifacts/${appId}/users/${userId}/tasks`),
+        where('projectId', '==', project.id)
+      );
+      const tasksSnapshot = await getDocs(tasksQuery);
+      tasksSnapshot.forEach((taskDoc) => batch.delete(taskDoc.ref));
+    }
+    await batch.commit();
+  };
+
+  return (
+    <div className="text-sm">
+      <ConfirmModal
+        isOpen={showDeleteModal}
+        onClose={() => setShowDeleteModal(false)}
+        onConfirm={handleDelete}
+        title="Delete Goal"
+        message={`Are you sure you want to delete the goal "${goal.name}" and all its projects and tasks?`}
+      />
+      <div className="flex items-center justify-between px-3 py-2 rounded-md hover:bg-gray-700/50 group">
+        {isEditing ? (
+          <form onSubmit={handleUpdate} className="flex-grow flex items-center gap-2">
+            <input
+              value={editedName}
+              onChange={(e) => setEditedName(e.target.value)}
+              className="w-full bg-gray-700 border border-gray-600 rounded-md px-2 py-1 text-sm focus:outline-none focus:ring-1 focus:ring-blue-500"
+              autoFocus
+            />
+            <button type="submit" className="p-1 text-green-400 hover:text-white">
+              <Save size={16} />
+            </button>
+          </form>
+        ) : (
+          <button onClick={() => setIsOpen(!isOpen)} className="flex items-center gap-2 flex-grow text-left">
+            {isOpen ? <ChevronDown size={16} /> : <ChevronRight size={16} />}
+            <span className="font-semibold text-gray-200 truncate">{goal.name}</span>
+          </button>
+        )}
+        <div className="flex items-center opacity-0 group-hover:opacity-100 transition-opacity">
+          <button onClick={() => setIsEditing(true)} className="p-1 text-gray-400 hover:text-white">
+            <Edit2 size={16} />
+          </button>
+          <button onClick={() => setShowDeleteModal(true)} className="p-1 text-gray-400 hover:text-red-400">
+            <Trash2 size={16} />
+          </button>
+        </div>
+      </div>
+      {isOpen && (
+        <div className="pl-6 border-l-2 border-gray-700 ml-5 my-1">
+          {projects.map((p) => (
+            <button
+              key={p.id}
+              onClick={() => onViewChange('project', p.id)}
+              className="w-full text-left flex items-center gap-3 px-3 py-1.5 rounded-md text-gray-300 hover:bg-gray-700/50 transition-colors truncate"
+            >
+              <div
+                className={`w-2 h-2 rounded-full ${
+                  p.type === 'Course'
+                    ? 'bg-green-400'
+                    : p.type === 'Seminar'
+                    ? 'bg-purple-400'
+                    : 'bg-yellow-400'
+                }`}
+              ></div>
+              {p.name}
+            </button>
+          ))}
+          {projects.length === 0 && <p className="px-3 py-1.5 text-xs text-gray-500">No projects yet.</p>}
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/src/features/tasks/AllTasksView.jsx b/src/features/tasks/AllTasksView.jsx
new file mode 100644
index 0000000..0b93774
--- /dev/null
+++ b/src/features/tasks/AllTasksView.jsx
@@ -0,0 +1,65 @@
+import React, { useMemo, useState } from 'react';
+import TaskItem from '../../components/shared/TaskItem';
+
+export default function AllTasksView({ tasks, projects }) {
+  const [filter, setFilter] = useState('All');
+  const [sortBy, setSortBy] = useState('dueDate');
+  const filteredAndSortedTasks = useMemo(() => {
+    let filtered = tasks;
+    if (filter === 'Active') filtered = tasks.filter((t) => !t.completed);
+    if (filter === 'Completed') filtered = tasks.filter((t) => t.completed);
+    return [...filtered].sort((a, b) => {
+      if (sortBy === 'dueDate')
+        return (a.dueDate ? new Date(a.dueDate) : new Date('2999-12-31')) -
+          (b.dueDate ? new Date(b.dueDate) : new Date('2999-12-31'));
+      if (sortBy === 'priority') {
+        const priorityOrder = { High: 1, Medium: 2, Low: 3 };
+        return priorityOrder[a.priority] - priorityOrder[b.priority];
+      }
+      if (sortBy === 'project') {
+        const projectA = projects.find((p) => p.id === a.projectId)?.name || '';
+        const projectB = projects.find((p) => p.id === b.projectId)?.name || '';
+        return projectA.localeCompare(projectB);
+      }
+      return 0;
+    });
+  }, [tasks, projects, filter, sortBy]);
+  return (
+    <div className="space-y-6">
+      <h1 className="text-4xl font-bold text-white">All Tasks</h1>
+      <div className="flex flex-wrap gap-4 items-center p-4 bg-gray-800/60 rounded-lg">
+        <div>
+          <span className="text-sm font-medium text-gray-400 mr-2">Filter by:</span>
+          <select
+            onChange={(e) => setFilter(e.target.value)}
+            value={filter}
+            className="bg-gray-700 border border-gray-600 rounded-md px-3 py-1.5 focus:outline-none focus:ring-2 focus:ring-blue-500"
+          >
+            <option>All</option>
+            <option>Active</option>
+            <option>Completed</option>
+          </select>
+        </div>
+        <div>
+          <span className="text-sm font-medium text-gray-400 mr-2">Sort by:</span>
+          <select
+            onChange={(e) => setSortBy(e.target.value)}
+            value={sortBy}
+            className="bg-gray-700 border border-gray-600 rounded-md px-3 py-1.5 focus:outline-none focus:ring-2 focus:ring-blue-500"
+          >
+            <option value="dueDate">Due Date</option>
+            <option value="priority">Priority</option>
+            <option value="project">Project</option>
+          </select>
+        </div>
+      </div>
+      <div className="space-y-3">
+        {filteredAndSortedTasks.length > 0 ? (
+          filteredAndSortedTasks.map((task) => <TaskItem key={task.id} task={task} projects={projects} />)
+        ) : (
+          <p className="text-gray-400 text-center py-8">No tasks found.</p>
+        )}
+      </div>
+    </div>
+  );
+}
diff --git a/src/index.js b/src/index.js
index 2cb1087..5be6466 100644
--- a/src/index.js
+++ b/src/index.js
@@ -2,10 +2,13 @@ import React from 'react';
 import ReactDOM from 'react-dom/client';
 import './index.css';
 import App from './App';
+import { AuthProvider } from './contexts/AuthContext';
 
 const root = ReactDOM.createRoot(document.getElementById('root'));
 root.render(
   <React.StrictMode>
-    <App />
+    <AuthProvider>
+      <App />
+    </AuthProvider>
   </React.StrictMode>
 );
diff --git a/src/services/geminiService.js b/src/services/geminiService.js
index f639712..c42305d 100644
--- a/src/services/geminiService.js
+++ b/src/services/geminiService.js
@@ -1,4 +1,4 @@
-const GEMINI_MODEL = 'gemini-2.5-flash';
+import { GEMINI_MODEL } from '../config/env';
 
 export const callGeminiWithRetry = async (payload, apiKey, maxRetries = 3) => {
     let retries = 0;
diff --git a/src/services/googleCalendar.js b/src/services/googleCalendar.js
new file mode 100644
index 0000000..75474c6
--- /dev/null
+++ b/src/services/googleCalendar.js
@@ -0,0 +1,57 @@
+const CALENDAR_SCOPE = 'https://www.googleapis.com/auth/calendar.readonly';
+
+export const loadGoogleIdentityScript = () =>
+  new Promise((resolve, reject) => {
+    if (window.google?.accounts?.oauth2) {
+      resolve(true);
+      return;
+    }
+    const existing = document.querySelector('script[src="https://accounts.google.com/gsi/client"]');
+    if (existing) {
+      existing.addEventListener('load', () => resolve(true));
+      existing.addEventListener('error', reject);
+      return;
+    }
+    const script = document.createElement('script');
+    script.src = 'https://accounts.google.com/gsi/client';
+    script.async = true;
+    script.defer = true;
+    script.onload = () => resolve(true);
+    script.onerror = reject;
+    document.body.appendChild(script);
+  });
+
+export const createCalendarTokenClient = ({ clientId, onToken, onError }) => {
+  if (!window.google?.accounts?.oauth2) return null;
+  const client = window.google.accounts.oauth2.initTokenClient({
+    client_id: clientId,
+    scope: CALENDAR_SCOPE,
+    callback: (tokenResponse) => {
+      if (tokenResponse?.access_token) {
+        onToken(tokenResponse.access_token);
+      } else if (onError) {
+        onError(new Error('No access token returned'));
+      }
+    },
+  });
+  return client;
+};
+
+export const fetchCalendarEvents = async (accessToken) => {
+  const startTime = new Date().toISOString();
+  const response = await fetch(
+    `https://www.googleapis.com/calendar/v3/calendars/primary/events?timeMin=${startTime}&singleEvents=true&orderBy=startTime`,
+    { headers: { Authorization: `Bearer ${accessToken}` } }
+  );
+  if (!response.ok) throw new Error('Failed to fetch calendar events');
+  const data = await response.json();
+  return data.items
+    .filter((item) => !(item.summary && item.summary.toLowerCase().includes('birthday')))
+    .map((item) => ({
+      id: `gcal-${item.id}`,
+      title: item.summary,
+      date: item.start.dateTime ? new Date(item.start.dateTime) : new Date(item.start.date),
+      type: 'Google Calendar',
+      color: 'bg-red-500',
+    }));
+};
diff --git a/src/utils/datetime.js b/src/utils/datetime.js
new file mode 100644
index 0000000..abfd65a
--- /dev/null
+++ b/src/utils/datetime.js
@@ -0,0 +1,20 @@
+export const formatDate = (date) => {
+  if (!date) return 'N/A';
+  const d = date instanceof Date ? date : date.toDate?.() ?? new Date(date);
+  return new Intl.DateTimeFormat('en-US', { year: 'numeric', month: 'short', day: 'numeric' }).format(d);
+};
+
+export const formatTime = (date) => {
+  if (!date) return '';
+  const d = new Date(date);
+  if (d.getUTCHours() === 0 && d.getUTCMinutes() === 0 && d.getUTCSeconds() === 0) {
+    return 'All-day';
+  }
+  return new Intl.DateTimeFormat('en-US', { hour: 'numeric', minute: '2-digit', hour12: true }).format(d);
+};
+
+export const getLocalDateKey = (date) => {
+  const d = new Date(date);
+  d.setMinutes(d.getMinutes() - d.getTimezoneOffset());
+  return d.toISOString().split('T')[0];
+};