feat(frontend): add API client, layout, and routing

- Create Axios-based API client with sources, jobs, and dashboard endpoints
- Add responsive Layout component with navigation sidebar
- Set up React Router with Dashboard, Backups, and Settings routes
- Configure TanStack Query provider with default options
- Use lucide-react for navigation icons

frontend/node_modules/@nodelib/fs.walk/out/providers/sync.js

@@ -0,0 +1,14 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const sync_1 = require("../readers/sync");
+class SyncProvider {
+    constructor(_root, _settings) {
+        this._root = _root;
+        this._settings = _settings;
+        this._reader = new sync_1.default(this._root, this._settings);
+    }
+    read() {
+        return this._reader.read();
+    }
+}
+exports.default = SyncProvider;