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/assertion-error/History.md

@@ -0,0 +1,24 @@
+1.1.0 / 2018-01-02
+==================
+
+  * Add type definitions ([#11](https://github.com/chaijs/assertion-error/pull/11))
+
+1.0.1 / 2015-03-04
+==================
+
+  * Merge pull request #2 from simonzack/master
+  * fixes `.stack` on firefox
+
+1.0.0 / 2013-06-08
+==================
+
+  * readme: change travis and component urls
+  * refactor: [*] prepare for move to chaijs gh org
+
+0.1.0 / 2013-04-07
+==================
+
+  * test: use vanilla test runner/assert
+  * pgk: remove unused deps
+  * lib: implement
+  * "Initial commit"