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/min-indent/index.js

@@ -0,0 +1,10 @@
+'use strict';
+module.exports = string => {
+	const match = string.match(/^[ \t]*(?=\S)/gm);
+
+	if (!match) {
+		return 0;
+	}
+
+	return match.reduce((r, a) => Math.min(r, a.length), Infinity);
+};