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/object.assign/test/index.js

@@ -0,0 +1,17 @@
+'use strict';
+
+var assign = require('../');
+var test = require('tape');
+var runTests = require('./tests');
+
+test('as a function', function (t) {
+	t.test('bad array/this value', function (st) {
+		st['throws'](function () { assign(undefined); }, TypeError, 'undefined is not an object');
+		st['throws'](function () { assign(null); }, TypeError, 'null is not an object');
+		st.end();
+	});
+
+	runTests(assign, t);
+
+	t.end();
+});