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/compat-data/data/native-modules.json

@@ -0,0 +1,18 @@
+{
+  "es6.module": {
+    "chrome": "61",
+    "and_chr": "61",
+    "edge": "16",
+    "firefox": "60",
+    "and_ff": "60",
+    "node": "13.2.0",
+    "opera": "48",
+    "op_mob": "45",
+    "safari": "10.1",
+    "ios": "10.3",
+    "samsung": "8.2",
+    "android": "61",
+    "electron": "2.0",
+    "ios_saf": "10.3"
+  }
+}