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

LinkSyncServer/models/__init__.py

@@ -0,0 +1,33 @@
+"""
+LinkSyncServer - Models Package
+"""
+
+from models.base import (
+    Base,
+    get_engine,
+    get_session,
+    init_db,
+    TimestampMixin,
+    User,
+    ApiKey,
+    Tag,
+    Bookmark,
+    Collection,
+    CollectionBookmark,
+    AuditLog,
+)
+
+__all__ = [
+    "Base",
+    "get_engine",
+    "get_session",
+    "init_db",
+    "TimestampMixin",
+    "User",
+    "ApiKey",
+    "Tag",
+    "Bookmark",
+    "Collection",
+    "CollectionBookmark",
+    "AuditLog",
+]