- Add comment threading/reply functionality with nested display
- Database migration for parent_comment_id and thread_depth columns
- Recursive comment rendering with depth-based indentation
- Reply form with inline UI and smooth animations
- Thread collapse/expand capability
- Max thread depth of 3 levels
- Fix 401 authentication errors on API calls
- Add credentials: 'same-origin' to all fetch calls
- Affects settings.js, ticket.js, dashboard.js, advanced-search.js
- Ensures session cookies are sent with requests
- Enhanced comment styling
- Thread connector lines for visual hierarchy
- Reply button on comments (up to depth 3)
- Quote block styling for replies
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>