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/rrweb-cssom/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "rrweb-cssom",
+  "description": "CSS Object Model implementation and CSS parser",
+  "keywords": [
+    "CSS",
+    "CSSOM",
+    "parser",
+    "styleSheet"
+  ],
+  "version": "0.6.0",
+  "author": "Nikita Vasilyev <me@elv1s.ru>",
+  "repository": "rrweb-io/CSSOM",
+  "files": [
+    "lib/"
+  ],
+  "main": "./lib/index.js",
+  "license": "MIT"
+}