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/recharts/lib/util/payload/getUniqPayload.js

@@ -0,0 +1,26 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.getUniqPayload = getUniqPayload;
+var _uniqBy = _interopRequireDefault(require("lodash/uniqBy"));
+var _isFunction = _interopRequireDefault(require("lodash/isFunction"));
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+/**
+ * This is configuration option that decides how to filter for unique values only:
+ *
+ * - `false` means "no filter"
+ * - `true` means "use recharts default filter"
+ * - function means "use return of this function as the default key"
+ */
+
+function getUniqPayload(payload, option, defaultUniqBy) {
+  if (option === true) {
+    return (0, _uniqBy["default"])(payload, defaultUniqBy);
+  }
+  if ((0, _isFunction["default"])(option)) {
+    return (0, _uniqBy["default"])(payload, option);
+  }
+  return payload;
+}