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/index.js

@@ -0,0 +1,9 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.SyncProvider = exports.StreamProvider = exports.AsyncProvider = void 0;
+const async_1 = require("./async");
+exports.AsyncProvider = async_1.default;
+const stream_1 = require("./stream");
+exports.StreamProvider = stream_1.default;
+const sync_1 = require("./sync");
+exports.SyncProvider = sync_1.default;