[UI] Add per-project templates repo support

frontend/src/locale/en.json

@@ -49,7 +49,7 @@
         "tutorial_other": "Take a tour",
         "docs": "Docs",
         "discord": "Discord",
-        "danger_zone": "Danger Zone",
+        "danger_zone": "Danger zone",
         "control_plane": "Control plane",
         "refresh": "Refresh",
         "quickstart": "Quickstart",
@@ -223,10 +223,26 @@
             "members_empty_message_text": "Select project's members",
             "update_members_success": "Members are updated",
             "update_visibility_success": "Project visibility updated successfully",
-            "update_visibility_confirm_title": "Change project visibility",
+            "update_templates_repo_success": "Templates updated successfully",
+            "update_visibility_confirm_title": "Change visibility",
             "update_visibility_confirm_message": "Are you sure you want to change the project visibility? This will affect who can access this project.",
             "change_visibility": "Change",
             "project_visibility": "Visibility",
+            "project_visibility_settings": "Visibility",
+            "templates_repo": "Templates",
+            "override_project_templates": "Templates",
+            "transfer_ownership": "Ownership",
+            "templates_repo_description": "Set a project-level templates repository URL",
+            "templates_repo_placeholder": "https://github.com/org/templates.git",
+            "templates_repo_not_set": "not set",
+            "templates_repo_required": "Templates repo URL cannot be empty",
+            "save_templates_repo": "Save",
+            "configure_templates_repo": "Configure",
+            "change_templates_repo_title": "Override project templates",
+            "change_templates_repo_message": "Specify a new templates Git repo URL:",
+            "reset_templates_repo": "Reset",
+            "reset_templates_repo_title": "Reset templates",
+            "reset_templates_repo_message": "Are you sure you want to reset templates for this project?",
             "project_visibility_description": "Control who can access this project",
             "make_project_public": "Make project public",
             "delete_project_confirm_title": "Delete project",
@@ -472,6 +488,11 @@
     },
     "runs": {
         "launch_button": "Launch",
+        "no_templates_alert": {
+            "title": "No templates configured",
+            "description": "The selected project has no templates available for Launch.",
+            "action": "Settings"
+        },
         "launch": {
             "wizard": {
                 "title": "Launch",

frontend/src/pages/Project/Details/Settings/constants.tsx

@@ -1,4 +1,5 @@
 import React from 'react';
+import Link from '@cloudscape-design/components/link';
 
 export const CLI_INFO = {
     header: <h2>CLI</h2>,
@@ -21,3 +22,23 @@ export const CLI_INFO = {
         </>
     ),
 };
+
+export const TEMPLATES_REPO_INFO = {
+    header: <h2>Templates</h2>,
+    body: (
+        <>
+            <p>
+                Specify a project-level templates Git repository URL. Templates from this repo are shown on the Launch page in
+                Runs, and setting it enables the Launch button when templates are available.
+            </p>
+            <p>If set, project templates override global templates configured on the server.</p>
+            <p>
+                See official examples in{' '}
+                <Link href="https://github.com/dstackai/dstack-templates" external>
+                    dstackai/dstack-templates
+                </Link>
+                .
+            </p>
+        </>
+    ),
+};