feat: remove Firebase, replace with manual room-name session entry

infra/cloud-run-relay/package.json

@@ -7,7 +7,6 @@
     "start": "node server.mjs"
   },
   "dependencies": {
-    "firebase-admin": "^13.0.0",
     "ws": "^8.18.1"
   }
 }

infra/cloud-run-relay/server.mjs

@@ -1,44 +1,7 @@
-import { initializeApp } from "firebase-admin/app";
-import { Timestamp, getFirestore } from "firebase-admin/firestore";
 import http from "node:http";
 import { WebSocketServer } from "ws";
 
 const port = Number(process.env.PORT || 8080);
-const RELAY_ROOMS_COLLECTION = "relay_rooms";
-const HEARTBEAT_INTERVAL_MS = 60_000;
-
-// Auto-initializes from the Cloud Run service account.
-initializeApp();
-const firestore = getFirestore();
-
-async function setRoomPresence(room) {
-  try {
-    await firestore.collection(RELAY_ROOMS_COLLECTION).doc(room).set({
-      connectedAt: Timestamp.now(),
-      lastHeartbeat: Timestamp.now(),
-    });
-  } catch (err) {
-    console.error(`[presence] set failed for ${room}:`, err.message);
-  }
-}
-
-async function updateRoomHeartbeat(room) {
-  try {
-    await firestore.collection(RELAY_ROOMS_COLLECTION).doc(room).update({
-      lastHeartbeat: Timestamp.now(),
-    });
-  } catch (err) {
-    console.error(`[presence] heartbeat failed for ${room}:`, err.message);
-  }
-}
-
-async function deleteRoomPresence(room) {
-  try {
-    await firestore.collection(RELAY_ROOMS_COLLECTION).doc(room).delete();
-  } catch (err) {
-    console.error(`[presence] delete failed for ${room}:`, err.message);
-  }
-}
 
 const server = http.createServer((req, res) => {
   if (req.url === "/healthz") {
@@ -57,12 +20,6 @@ function roomKey(room) {
   return `room:${room}`;
 }
 
-// Refresh lastHeartbeat for every live room so the backend can filter stale entries.
-setInterval(() => {
-  for (const key of rooms.keys()) {
-    updateRoomHeartbeat(key.slice("room:".length));
-  }
-}, HEARTBEAT_INTERVAL_MS);
 
 const wss = new WebSocketServer({ server, path: "/relay" });
 
@@ -81,11 +38,6 @@ wss.on("connection", (ws, req) => {
   peers.add(ws);
   rooms.set(key, peers);
 
-  // Write presence the first time any peer joins this room.
-  if (peers.size === 1) {
-    setRoomPresence(room);
-  }
-
   if (existingPeers.length > 0) {
     const msg = JSON.stringify({ type: "peer_joined" });
     for (const peer of existingPeers) {
@@ -107,7 +59,6 @@ wss.on("connection", (ws, req) => {
     peers.delete(ws);
     if (peers.size === 0) {
       rooms.delete(key);
-      deleteRoomPresence(room);
     }
   });
 });

ios/GoVibeFeaturePackage/Package.swift

@@ -14,20 +14,12 @@ let package = Package(
         ),
     ],
     dependencies: [
-        .package(url: "https://github.com/firebase/firebase-ios-sdk.git", from: "11.10.0"),
         .package(path: "../ThirdParty/SwiftTerm")
     ],
     targets: [
-        // Targets are the basic building blocks of a package, defining a module or a test suite.
-        // Targets can depend on other targets in this package and products from dependencies.
         .target(
             name: "GoVibeFeature",
             dependencies: [
-                .product(name: "FirebaseCore", package: "firebase-ios-sdk"),
-                .product(name: "FirebaseAuth", package: "firebase-ios-sdk"),
-                .product(name: "FirebaseFirestore", package: "firebase-ios-sdk"),
-                .product(name: "FirebaseMessaging", package: "firebase-ios-sdk"),
-                .product(name: "FirebaseFunctions", package: "firebase-ios-sdk"),
                 .product(name: "SwiftTerm", package: "SwiftTerm")
             ]
         ),

ios/GoVibeFeaturePackage/Sources/GoVibeFeature/AppRuntimeConfig.swift

@@ -2,21 +2,9 @@ import Foundation
 
 enum AppRuntimeConfig {
     private enum Keys {
-        static let gcpRegion = "GOVIBE_GCP_REGION"
-        static let gcpProjectID = "GOVIBE_GCP_PROJECT_ID"
         static let gcpRelayHost = "GOVIBE_GCP_RELAY_HOST"
     }
 
-    static let apiBaseURL: URL = {
-        let region = requiredConfiguredValue(for: Keys.gcpRegion, expectedExample: "us-west1")
-        let projectID = requiredConfiguredValue(for: Keys.gcpProjectID, expectedExample: "my-project-id")
-        let raw = "https://\(region)-\(projectID).cloudfunctions.net/api"
-        guard let url = URL(string: raw) else {
-            fatalError("Invalid assembled API URL: \(raw)")
-        }
-        return url
-    }()
-
     static let relayWebSocketBase: String = {
         let relayHostRaw = requiredConfiguredValue(
             for: Keys.gcpRelayHost,

ios/GoVibeFeaturePackage/Sources/GoVibeFeature/GoVibeBootstrap.swift

@@ -1,10 +1,7 @@
-import FirebaseCore
 import Foundation
 
 public enum GoVibeBootstrap {
     public static func configureFirebaseIfNeeded() {
-        if FirebaseApp.app() == nil {
-            FirebaseApp.configure()
-        }
+        // Firebase removed.
     }
 }

ios/GoVibeFeaturePackage/Sources/GoVibeFeature/Models.swift

@@ -1,30 +1,5 @@
 import Foundation
 
-struct SessionCreateResponse: Codable {
-    struct Ice: Codable {
-        struct Turn: Codable {
-            let username: String
-            let credential: String
-            let ttl: Int
-            let urls: [String]
-        }
-
-        let policy: String
-        let relayRequired: Bool
-        let turn: Turn
-    }
-
-    let sessionId: String
-    let signalingPath: String
-    let token: String
-    let ice: Ice
-}
-
-struct SessionDiscoveryResponse: Codable {
-    let roomIds: [String]
-    let count: Int
-}
-
 struct TerminalLine: Identifiable {
     let id = UUID()
     let text: String

ios/GoVibeFeaturePackage/Sources/GoVibeFeature/SessionDetailView.swift

@@ -81,7 +81,7 @@ struct SessionDetailView: View {
         .background(Color.black)
         .accessibilityIdentifier("govibe_root_view")
         .task {
-            await viewModel.bootstrapAuth()
+            viewModel.connectRelayNow()
         }
         .onDisappear {
             viewModel.disconnectRelay()

ios/GoVibeFeaturePackage/Sources/GoVibeFeature/SessionListView.swift

@@ -36,6 +36,8 @@ struct SessionListView: View {
         }
         .alert("New Session", isPresented: $showingAddAlert) {
             TextField("Room ID", text: $newRoomId)
+                .autocorrectionDisabled()
+                .modifier(NeverAutocapitalize())
             Button("Add") {
                 store.add(roomId: newRoomId)
                 newRoomId = ""
@@ -176,6 +178,16 @@ struct SessionListView: View {
     }
 }
 
+private struct NeverAutocapitalize: ViewModifier {
+    func body(content: Content) -> some View {
+        #if canImport(UIKit)
+        content.textInputAutocapitalization(.never)
+        #else
+        content
+        #endif
+    }
+}
+
 private struct SessionPlaceholderView: View {
     var body: some View {
         ContentUnavailableView(