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/hotel.js

@@ -0,0 +1,29 @@
+/**
+ * @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 Hotel = createLucideIcon("Hotel", [
+  [
+    "path",
+    {
+      d: "M18 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V4a2 2 0 0 0-2-2Z",
+      key: "p9z69c"
+    }
+  ],
+  ["path", { d: "m9 16 .348-.24c1.465-1.013 3.84-1.013 5.304 0L15 16", key: "1bvcvh" }],
+  ["path", { d: "M8 7h.01", key: "1vti4s" }],
+  ["path", { d: "M16 7h.01", key: "1kdx03" }],
+  ["path", { d: "M12 7h.01", key: "1ivr5q" }],
+  ["path", { d: "M12 11h.01", key: "z322tv" }],
+  ["path", { d: "M16 11h.01", key: "xkw8gn" }],
+  ["path", { d: "M8 11h.01", key: "1dfujw" }],
+  ["path", { d: "M10 22v-6.5m4 0V22", key: "16gs4s" }]
+]);
+
+export { Hotel as default };
+//# sourceMappingURL=hotel.js.map