This commit addresses two related issues in the chat interface:
1. **Fix broken reference links (OSS-310)**
- Completely rewrote convertReferencesToMarkdownLinks() with greedy pattern matching
- Now handles all edge cases: references after commas, nested brackets, bold markdown
- Added visual icon indicators (FileText, Lightbulb, FileEdit) for reference types
- Implemented proper error handling with toast notifications
- Added validation for reference types and ID lengths
2. **Fix long URL/text overflow (#172)**
- Added break-words and overflow-wrap classes to chat messages
- Long URLs and text now wrap properly within chat bubbles
- Applied fix consistently across source chat, notebook chat, and search results
**Technical Details:**
- Enhanced reference detection algorithm processes from end to start to preserve indices
- Context analysis (50 chars before/after) determines original formatting
- Icons are 12px, accessible, and themed appropriately
- All changes pass linting and build successfully
**Files Modified:**
- frontend/src/lib/utils/source-references.tsx (core algorithm rewrite)
- frontend/src/components/source/ChatPanel.tsx (error handling + text wrapping)
- frontend/src/components/search/StreamingResponse.tsx (error handling + text wrapping)
- open_notebook/utils/token_utils.py (ruff formatting fix)
fixes#172
1a67f1f912