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/static/js/main.js

@@ -0,0 +1,74 @@
+document.addEventListener("DOMContentLoaded", function () {
+    const apiBase = "/api";
+
+    async function apiFetch(endpoint, options = {}) {
+        const token = localStorage.getItem("token");
+        const headers = {
+            "Content-Type": "application/json",
+            ...options.headers,
+        };
+        if (token) {
+            headers["Authorization"] = `Bearer ${token}`;
+        }
+        const response = await fetch(`${apiBase}${endpoint}`, {
+            ...options,
+            headers,
+        });
+        if (!response.ok) {
+            throw new Error(`API error: ${response.status}`);
+        }
+        return response.json();
+    }
+
+    window.LinkSync = {
+        apiFetch,
+        async getLinks(params = {}) {
+            const qs = new URLSearchParams(params).toString();
+            return apiFetch(`/links/?${qs}`);
+        },
+        async createLink(data) {
+            return apiFetch("/links/", {
+                method: "POST",
+                body: JSON.stringify(data),
+            });
+        },
+        async updateLink(id, data) {
+            return apiFetch(`/links/${id}`, {
+                method: "PUT",
+                body: JSON.stringify(data),
+            });
+        },
+        async deleteLink(id) {
+            return apiFetch(`/links/${id}`, { method: "DELETE" });
+        },
+        async getCollections() {
+            return apiFetch("/collections/");
+        },
+        async createCollection(data) {
+            return apiFetch("/collections/", {
+                method: "POST",
+                body: JSON.stringify(data),
+            });
+        },
+        async executeQuery(expression, limit = 20) {
+            return apiFetch(`/queries/execute?expression=${encodeURIComponent(expression)}&limit=${limit}`);
+        },
+        async login(username, password) {
+            const formData = new URLSearchParams();
+            formData.append("username", username);
+            formData.append("password", password);
+            const response = await fetch(`${apiBase}/auth/login`, {
+                method: "POST",
+                headers: { "Content-Type": "application/x-www-form-urlencoded" },
+                body: formData.toString(),
+            });
+            if (!response.ok) throw new Error("Login failed");
+            const data = await response.json();
+            localStorage.setItem("token", data.access_token);
+            return data;
+        },
+        logout() {
+            localStorage.removeItem("token");
+        },
+    };
+});