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/lucide-react/dist/esm/icons/drumstick.js

@@ -0,0 +1,28 @@
+/**
+ * @license lucide-react v0.303.0 - ISC
+ *
+ * This source code is licensed under the ISC license.
+ * See the LICENSE file in the root directory of this source tree.
+ */
+
+import createLucideIcon from '../createLucideIcon.js';
+
+const Drumstick = createLucideIcon("Drumstick", [
+  [
+    "path",
+    {
+      d: "M15.45 15.4c-2.13.65-4.3.32-5.7-1.1-2.29-2.27-1.76-6.5 1.17-9.42 2.93-2.93 7.15-3.46 9.43-1.18 1.41 1.41 1.74 3.57 1.1 5.71-1.4-.51-3.26-.02-4.64 1.36-1.38 1.38-1.87 3.23-1.36 4.63z",
+      key: "1o96s0"
+    }
+  ],
+  [
+    "path",
+    {
+      d: "m11.25 15.6-2.16 2.16a2.5 2.5 0 1 1-4.56 1.73 2.49 2.49 0 0 1-1.41-4.24 2.5 2.5 0 0 1 3.14-.32l2.16-2.16",
+      key: "14vv5h"
+    }
+  ]
+]);
+
+export { Drumstick as default };
+//# sourceMappingURL=drumstick.js.map