- Remove leading slash from file paths (use relative paths from workspace)
- Server expects relative paths like 'file.md' not '/file.md'
- Convert isInitialized from let to signal to persist across renders
- Fix file picker not showing files on first open
- Paths from find.files() are already relative to workspace
- Create attachment type system with file, text, symbol, and agent sources
- Implement file picker with SDK integration (find.files, file.status)
- Add @ detection in prompt input to trigger file search
- Create attachment chips UI for managing attached files
- Add attachment state management per session
- Update message submission to include attachments
- Implement drag & drop support for adding files
- Show git-modified files first in file picker with +/- indicators
- Filter files as user types after @
- Clear attachments after successful message send
