* feat: make trashed notes read-only with visible banner in editor
When a note is in the Trash, the editor now shows a banner below the
breadcrumb ("This note is in the Trash") with Restore and Delete
permanently buttons. The BlockNote editor is set to read-only mode,
preventing accidental edits while still allowing navigation and copy.
- Add TrashedNoteBanner component with restore/delete actions
- Pass editable={false} to BlockNoteView when note is trashed
- Add delete_note Rust command for permanent file deletion
- Wire onDeleteNote through Editor → EditorContent → App
- Extract EditorBody to reduce EditorContent cyclomatic complexity
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* style: rustfmt fix
---------
Co-authored-by: Test <test@test.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
