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/util-deprecate/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "util-deprecate",
+  "version": "1.0.2",
+  "description": "The Node.js `util.deprecate()` function with browser support",
+  "main": "node.js",
+  "browser": "browser.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/TooTallNate/util-deprecate.git"
+  },
+  "keywords": [
+    "util",
+    "deprecate",
+    "browserify",
+    "browser",
+    "node"
+  ],
+  "author": "Nathan Rajlich <nathan@tootallnate.net> (http://n8.io/)",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/TooTallNate/util-deprecate/issues"
+  },
+  "homepage": "https://github.com/TooTallNate/util-deprecate"
+}