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/workers.d.ts

@@ -0,0 +1,40 @@
+import * as v8 from 'v8';
+import { d as BirpcOptions, e as RuntimeRPC, f as ContextRPC, W as WorkerGlobalState, g as WorkerContext, R as ResolvedConfig } from './reporters-w_64AS5f.js';
+import { Awaitable } from '@vitest/utils';
+import 'vite';
+import '@vitest/runner';
+import 'vite-node';
+import '@vitest/snapshot';
+import '@vitest/expect';
+import '@vitest/runner/utils';
+import 'tinybench';
+import 'node:stream';
+import 'vite-node/client';
+import '@vitest/snapshot/manager';
+import 'vite-node/server';
+import 'node:worker_threads';
+import 'node:fs';
+import 'chai';
+
+type WorkerRpcOptions = Pick<BirpcOptions<RuntimeRPC>, 'on' | 'post' | 'serialize' | 'deserialize'>;
+interface VitestWorker {
+    getRpcOptions: (ctx: ContextRPC) => WorkerRpcOptions;
+    runTests: (state: WorkerGlobalState) => Awaitable<unknown>;
+}
+
+declare function createThreadsRpcOptions({ port }: WorkerContext): WorkerRpcOptions;
+declare function createForksRpcOptions(nodeV8: typeof v8): WorkerRpcOptions;
+/**
+ * Reverts the wrapping done by `utils/config-helpers.ts`'s `wrapSerializableConfig`
+ */
+declare function unwrapSerializableConfig(config: ResolvedConfig): ResolvedConfig;
+
+declare function provideWorkerState(context: any, state: WorkerGlobalState): WorkerGlobalState;
+
+declare function run(ctx: ContextRPC): Promise<void>;
+
+declare function runVmTests(state: WorkerGlobalState): Promise<void>;
+
+declare function runBaseTests(state: WorkerGlobalState): Promise<void>;
+
+export { type VitestWorker, type WorkerRpcOptions, createForksRpcOptions, createThreadsRpcOptions, provideWorkerState, runBaseTests, run as runVitestWorker, runVmTests, unwrapSerializableConfig };