- Fix thinking content area scroll functionality in MessageContent.js
* Replace max-h-50 with explicit maxHeight style (200px)
* Add thinking-content-scroll CSS class for proper scrollbar styling
* Ensure scrollbars are visible when content exceeds container height
- Add thinking-content-scroll CSS class in index.css
* Define webkit scrollbar styles with proper dimensions (6px)
* Add hover effects and cross-browser compatibility
* Support both webkit and Firefox scrollbar styling
- Remove unused CSS classes to improve code cleanliness
* Remove .hide-on-mobile class (no usage found in codebase)
* Remove .debug-code class (no longer needed)
- Improve user experience for viewing lengthy thinking content
* Users can now properly scroll through AI reasoning content
* Maintains content visibility with appropriate height constraints
Resolves issue where thinking section had max height but no scrolling capability.
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