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/controller.d.ts

@@ -0,0 +1,46 @@
+import type { ControllerProps, FieldPath, FieldValues } from './types';
+/**
+ * Component based on `useController` hook to work with controlled component.
+ *
+ * @remarks
+ * [API](https://react-hook-form.com/docs/usecontroller/controller) • [Demo](https://codesandbox.io/s/react-hook-form-v6-controller-ts-jwyzw) • [Video](https://www.youtube.com/watch?v=N2UNk_UCVyA)
+ *
+ * @param props - the path name to the form field value, and validation rules.
+ *
+ * @returns provide field handler functions, field and form state.
+ *
+ * @example
+ * ```tsx
+ * function App() {
+ *   const { control } = useForm<FormValues>({
+ *     defaultValues: {
+ *       test: ""
+ *     }
+ *   });
+ *
+ *   return (
+ *     <form>
+ *       <Controller
+ *         control={control}
+ *         name="test"
+ *         render={({ field: { onChange, onBlur, value, ref }, formState, fieldState }) => (
+ *           <>
+ *             <input
+ *               onChange={onChange} // send value to hook form
+ *               onBlur={onBlur} // notify when input is touched
+ *               value={value} // return updated value
+ *               ref={ref} // set ref for focus management
+ *             />
+ *             <p>{formState.isSubmitted ? "submitted" : ""}</p>
+ *             <p>{fieldState.isTouched ? "touched" : ""}</p>
+ *           </>
+ *         )}
+ *       />
+ *     </form>
+ *   );
+ * }
+ * ```
+ */
+declare const Controller: <TFieldValues extends FieldValues = FieldValues, TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>, TTransformedValues = TFieldValues>(props: ControllerProps<TFieldValues, TName, TTransformedValues>) => import("react").ReactElement<unknown, string | import("react").JSXElementConstructor<any>>;
+export { Controller };
+//# sourceMappingURL=controller.d.ts.map