fix: Add scrollable container to ToolSelectorModal for small screens

- Add max-h-[90vh] and flex-col to modal content container
- Wrap tools grid in max-h-[50vh] overflow-y-auto container
- Add overscroll-contain for smooth scroll behavior on mobile
- Fixes issue where 21 PDF tools overflow viewport on small screens

docker-compose.prod.yml

@@ -60,7 +60,7 @@ services:
       celery -A celery_worker.celery worker
       --loglevel=warning
       --concurrency=4
-      -Q default,convert,compress,image,video,pdf_tools,flowchart
+      -Q default,convert,compress,image,video,pdf_tools,flowchart,ai_heavy
     env_file:
       - .env
     environment: