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

backend/app/extensions.py

@@ -70,7 +70,7 @@ def init_celery(app):
         "app.tasks.pdf_to_excel_tasks.*": {"queue": "pdf_tools"},
         "app.tasks.qrcode_tasks.*": {"queue": "default"},
         "app.tasks.html_to_pdf_tasks.*": {"queue": "convert"},
-        "app.tasks.pdf_ai_tasks.*": {"queue": "default"},
+        "app.tasks.pdf_ai_tasks.*": {"queue": "ai_heavy"},
         "app.tasks.pdf_convert_tasks.*": {"queue": "convert"},
         "app.tasks.pdf_extra_tasks.*": {"queue": "pdf_tools"},
         "app.tasks.image_extra_tasks.*": {"queue": "image"},