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/@babel/runtime/helpers/esm/setFunctionName.js

@@ -0,0 +1,12 @@
+import _typeof from "./typeof.js";
+function setFunctionName(e, t, n) {
+  "symbol" == _typeof(t) && (t = (t = t.description) ? "[" + t + "]" : "");
+  try {
+    Object.defineProperty(e, "name", {
+      configurable: !0,
+      value: n ? n + " " + t : t
+    });
+  } catch (e) {}
+  return e;
+}
+export { setFunctionName as default };