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/flower.js

@@ -0,0 +1,26 @@
+/**
+ * @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 Flower = createLucideIcon("Flower", [
+  [
+    "path",
+    {
+      d: "M12 7.5a4.5 4.5 0 1 1 4.5 4.5M12 7.5A4.5 4.5 0 1 0 7.5 12M12 7.5V9m-4.5 3a4.5 4.5 0 1 0 4.5 4.5M7.5 12H9m7.5 0a4.5 4.5 0 1 1-4.5 4.5m4.5-4.5H15m-3 4.5V15",
+      key: "51z86h"
+    }
+  ],
+  ["circle", { cx: "12", cy: "12", r: "3", key: "1v7zrd" }],
+  ["path", { d: "m8 16 1.5-1.5", key: "ce6zph" }],
+  ["path", { d: "M14.5 9.5 16 8", key: "1kzrzb" }],
+  ["path", { d: "m8 8 1.5 1.5", key: "1yv88w" }],
+  ["path", { d: "M14.5 14.5 16 16", key: "12xhjh" }]
+]);
+
+export { Flower as default };
+//# sourceMappingURL=flower.js.map