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/vite-node/dist/utils.d.ts

@@ -0,0 +1,33 @@
+import { N as Nullable, A as Arrayable } from './index-O2IrwHKf.js';
+import './trace-mapping.d-xyIfZtPm.js';
+
+declare const isWindows: boolean;
+declare function slash(str: string): string;
+declare const VALID_ID_PREFIX = "/@id/";
+declare function normalizeRequestId(id: string, base?: string): string;
+declare const queryRE: RegExp;
+declare const hashRE: RegExp;
+declare function cleanUrl(url: string): string;
+declare function isInternalRequest(id: string): boolean;
+declare function normalizeModuleId(id: string): string;
+declare function isPrimitive(v: any): boolean;
+declare function toFilePath(id: string, root: string): {
+    path: string;
+    exists: boolean;
+};
+declare function isNodeBuiltin(id: string): boolean;
+/**
+ * Convert `Arrayable<T>` to `Array<T>`
+ *
+ * @category Array
+ */
+declare function toArray<T>(array?: Nullable<Arrayable<T>>): Array<T>;
+declare function getCachedData<T>(cache: Map<string, T>, basedir: string, originalBasedir: string): NonNullable<T> | undefined;
+declare function setCacheData<T>(cache: Map<string, T>, data: T, basedir: string, originalBasedir: string): void;
+declare function withTrailingSlash(path: string): string;
+declare function createImportMetaEnvProxy(): NodeJS.ProcessEnv;
+declare function findNearestPackageData(basedir: string): Promise<{
+    type?: 'module' | 'commonjs';
+}>;
+
+export { VALID_ID_PREFIX, cleanUrl, createImportMetaEnvProxy, findNearestPackageData, getCachedData, hashRE, isInternalRequest, isNodeBuiltin, isPrimitive, isWindows, normalizeModuleId, normalizeRequestId, queryRE, setCacheData, slash, toArray, toFilePath, withTrailingSlash };