Complete LinkSyncServer and LinkSyncExtension implementation

LinkSyncServer:
- Fix app.py imports, add CORS middleware, lifespan events
- Create api/routes.py router aggregator
- Create config/settings.py for centralized configuration
- Rewrite models/base.py with proper relationships and serialization
- Rewrite all API endpoints with real DB integration (auth, links, collections, sync, queries, tags)
- Add admin endpoints (user management, stats, audit log)
- Complete query parser with recursive descent and proper precedence
- Complete query executor with set operations and field filters
- Set up Alembic migrations with initial schema
- Create web interface (templates, CSS, JS)
- Add 42 passing tests (auth, links, collections, queries)
- Add deploy.ps1 and deploy.sh scripts
- Update README with deployment workflow

LinkSyncExtension:
- Create utils/api.js (REST client with retries, auth, error handling)
- Create utils/sync.js (3 sync modes + conflict detection)
- Create utils/collection.js (collection management)
- Create utils/query-engine.js (client-side query parser)
- Rewrite background.js (sync loop, bookmark events, message routing)
- Rewrite popup.js (tabs, settings modal, notifications, CRUD)
- Update popup.html (tabbed interface, query builder, modal)
- Update popup.css (full redesign)
- Create content/content.js (page metadata extraction)
- Create options.html/js (dedicated settings page)
- Generate icons (48x48, 96x96)
- Update manifest.json (host permissions, content scripts, options)
- Create AGENTS.md

LinkSyncExtension/manifest.json

@@ -6,9 +6,12 @@
     "permissions": [
         "bookmarks",
         "storage",
-        "activeTab"
+        "activeTab",
+        "tabs",
+        "<all_urls>"
     ],
     "browser_action": {
+        "default_popup": "popup.html",
         "default_icon": {
             "48": "icons/icon-48.png",
             "96": "icons/icon-96.png"
@@ -18,10 +21,21 @@
     "background": {
         "page": "background.html"
     },
+    "content_scripts": [
+        {
+            "matches": ["<all_urls>"],
+            "js": ["content/content.js"],
+            "run_at": "document_idle"
+        }
+    ],
+    "options_ui": {
+        "page": "options.html",
+        "open_in_tab": true
+    },
     "browser_specific_settings": {
         "gecko": {
-            "id": "{linksync-browser-extension-id}",
+            "id": "linksync@example.com",
             "strict_min_version": "109.0"
         }
     }
-}
+}