Add frontend smoke test script to validate build and responsiveness

- Introduced a new script `frontend-smoke.mjs` to check for essential UI controls and responsive styles in the frontend application.
- The script verifies the existence of the built `index.html` and `assets` directory, as well as checks for the presence of required labels in `App.tsx` and specific CSS rules in `styles.css`.
- Outputs a JSON report indicating success or failure of the checks.

Author: SeCuReDmE-main-dev

.gitignore

@@ -9,6 +9,9 @@ __pycache__/
 .mypy_cache/
 .venv/
 venv/
+node_modules/
+tsconfig.tsbuildinfo
+.codex-run/
 
 dist/
 build/