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/dom-accessibility-api/dist/index.js

@@ -0,0 +1,27 @@
+"use strict";
+
+exports.__esModule = true;
+var _exportNames = {
+  computeAccessibleDescription: true,
+  computeAccessibleName: true,
+  getRole: true,
+  isDisabled: true
+};
+exports.isDisabled = exports.getRole = exports.computeAccessibleName = exports.computeAccessibleDescription = void 0;
+var _accessibleDescription = require("./accessible-description");
+exports.computeAccessibleDescription = _accessibleDescription.computeAccessibleDescription;
+var _accessibleName = require("./accessible-name");
+exports.computeAccessibleName = _accessibleName.computeAccessibleName;
+var _getRole = _interopRequireDefault(require("./getRole"));
+exports.getRole = _getRole.default;
+var _isInaccessible = require("./is-inaccessible");
+Object.keys(_isInaccessible).forEach(function (key) {
+  if (key === "default" || key === "__esModule") return;
+  if (Object.prototype.hasOwnProperty.call(_exportNames, key)) return;
+  if (key in exports && exports[key] === _isInaccessible[key]) return;
+  exports[key] = _isInaccessible[key];
+});
+var _isDisabled = require("./is-disabled");
+exports.isDisabled = _isDisabled.isDisabled;
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+//# sourceMappingURL=index.js.map