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/trace-mapping.d-xyIfZtPm.d.ts

@@ -0,0 +1,54 @@
+type GeneratedColumn = number;
+type SourcesIndex = number;
+type SourceLine = number;
+type SourceColumn = number;
+type NamesIndex = number;
+type SourceMapSegment = [GeneratedColumn] | [GeneratedColumn, SourcesIndex, SourceLine, SourceColumn] | [GeneratedColumn, SourcesIndex, SourceLine, SourceColumn, NamesIndex];
+
+interface SourceMapV3 {
+    file?: string | null;
+    names: string[];
+    sourceRoot?: string;
+    sources: (string | null)[];
+    sourcesContent?: (string | null)[];
+    version: 3;
+}
+interface EncodedSourceMap extends SourceMapV3 {
+    mappings: string;
+}
+interface DecodedSourceMap extends SourceMapV3 {
+    mappings: SourceMapSegment[][];
+}
+type SourceMapInput = string | Ro<EncodedSourceMap> | Ro<DecodedSourceMap> | TraceMap;
+declare abstract class SourceMap {
+    version: SourceMapV3['version'];
+    file: SourceMapV3['file'];
+    names: SourceMapV3['names'];
+    sourceRoot: SourceMapV3['sourceRoot'];
+    sources: SourceMapV3['sources'];
+    sourcesContent: SourceMapV3['sourcesContent'];
+    resolvedSources: SourceMapV3['sources'];
+}
+type Ro<T> = T extends Array<infer V> ? V[] | Readonly<V[]> | RoArray<V> | Readonly<RoArray<V>> : T extends object ? T | Readonly<T> | RoObject<T> | Readonly<RoObject<T>> : T;
+type RoArray<T> = Ro<T>[];
+type RoObject<T> = {
+    [K in keyof T]: T[K] | Ro<T[K]>;
+};
+
+declare class TraceMap implements SourceMap {
+    version: SourceMapV3['version'];
+    file: SourceMapV3['file'];
+    names: SourceMapV3['names'];
+    sourceRoot: SourceMapV3['sourceRoot'];
+    sources: SourceMapV3['sources'];
+    sourcesContent: SourceMapV3['sourcesContent'];
+    resolvedSources: string[];
+    private _encoded;
+    private _decoded;
+    private _decodedMemo;
+    private _bySources;
+    private _bySourceMemos;
+    constructor(map: SourceMapInput, mapUrl?: string | null);
+}
+
+export type { DecodedSourceMap as D, EncodedSourceMap as E, SourceMapInput as S };