1) Replace the three files in your project with these versions.
2) In .env use:
   GEMINI_API_KEY=your_real_key
   GEMINI_MODEL=gemini-2.5-flash-lite
3) Run:
   php artisan optimize:clear
4) Test again.
5) If it still fails, check storage/logs/laravel.log for "Gemini API response error".
