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/vite-node/dist/hmr.cjs

@@ -0,0 +1,21 @@
+'use strict';
+
+var hmr = require('./chunk-hmr.cjs');
+require('node:events');
+require('picocolors');
+require('debug');
+require('./utils.cjs');
+require('node:url');
+require('node:module');
+require('node:fs');
+require('pathe');
+
+
+
+exports.createHmrEmitter = hmr.createHmrEmitter;
+exports.createHotContext = hmr.createHotContext;
+exports.getCache = hmr.getCache;
+exports.handleMessage = hmr.handleMessage;
+exports.reload = hmr.reload;
+exports.sendMessageBuffer = hmr.sendMessageBuffer;
+exports.viteNodeHmrPlugin = hmr.viteNodeHmrPlugin;