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/vitest/dist/chunks/environments-node.vcoXCoKs.js

@@ -0,0 +1,19 @@
+import { NodeSnapshotEnvironment } from '@vitest/snapshot/environment';
+import 'pathe';
+import '@vitest/runner/utils';
+import '@vitest/utils';
+import { g as getWorkerState } from '../vendor/global.CkGT_TMy.js';
+import '../vendor/env.AtSIuHFg.js';
+import 'std-env';
+
+class VitestNodeSnapshotEnvironment extends NodeSnapshotEnvironment {
+  getHeader() {
+    return `// Vitest Snapshot v${this.getVersion()}, https://vitest.dev/guide/snapshot.html`;
+  }
+  resolvePath(filepath) {
+    const rpc = getWorkerState().rpc;
+    return rpc.resolveSnapshotPath(filepath);
+  }
+}
+
+export { VitestNodeSnapshotEnvironment };