Major improvements to link handling and navigation:
Features:
- Display links inline with numbered indicators [0], [1], etc.
- Quick navigation: type number + Enter to jump to link
- Fast follow: press 'f' + number to open link directly
- Visual improvements: links shown with underline and highlight
- Remove separate link list at bottom for better readability
Technical changes:
- Add InlineLink structure to track link positions in text
- Implement wrap_text_with_links() for intelligent text wrapping
- Add GOTO_LINK and FOLLOW_LINK_NUM actions
- Implement LINK input mode for 'f' command
- Character-by-character rendering for proper link highlighting
- Update help documentation with new navigation methods
Usage examples:
- 3<Enter> : Jump to link 3
- f5 or 5f : Open link 5 directly
- Tab/Enter : Traditional navigation still works
All comments converted to standard Unix style (English).
