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/react-hook-form/dist/logic/hasValidation.d.ts

@@ -0,0 +1,4 @@
+import type { Field } from '../types';
+declare const _default: (options: Field["_f"]) => string | number | boolean | import("..").ValidationValueMessage<boolean> | import("..").ValidationValueMessage<string | number> | import("..").ValidationRule<RegExp> | import("..").Validate<any, import("..").FieldValues> | Record<string, import("..").Validate<any, import("..").FieldValues>> | undefined;
+export default _default;
+//# sourceMappingURL=hasValidation.d.ts.map