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/https-proxy-agent/dist/parse-proxy-response.d.ts

@@ -0,0 +1,15 @@
+/// <reference types="node" />
+/// <reference types="node" />
+/// <reference types="node" />
+import { IncomingHttpHeaders } from 'http';
+import { Readable } from 'stream';
+export interface ConnectResponse {
+    statusCode: number;
+    statusText: string;
+    headers: IncomingHttpHeaders;
+}
+export declare function parseProxyResponse(socket: Readable): Promise<{
+    connect: ConnectResponse;
+    buffered: Buffer;
+}>;
+//# sourceMappingURL=parse-proxy-response.d.ts.map