- Constrain selection/cursor to edit span boundaries during inline edit
- Auto-select entire text when entering edit mode (Name, Value, Type)
- Double-click during edit selects entire editable text
- Fix vector component validation (subLine >= 0 for x component)
- Accept EU decimal separator (comma) for float parsing
- Darker selection highlight (35,35,35) vs hover (43,43,43)
- Remove blue text indicator, use hidden style
- Fix validation error message display
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Comment shows "Enter=Save Esc=Cancel" when valid, "! value" when invalid
- Only updates on validation state change to avoid lag
- Uses deferred timer for Scintilla document sync
- Added tests for comment echo and validation error display