- Add _EditorField enum and _EditorState class for mutable field tracking
- Add _Mode.editor and wire 'e' key in board+detail modes
- Editor supports: title (inline text edit), type (◀/▶ selector),
column (◀/▶ selector), labels (chips + add/delete), milestones (same),
body (preview + launches $VISUAL/$EDITOR/vi in raw terminal)
- j/k and arrow keys navigate between fields
- h/l cycle selector values and move item cursor in multi-value lists
- d removes selected label/milestone
- s saves all fields via store.update(), returns to board with focus on ticket
- Esc/q discards, returns to board
- _renderEditor: centered modal overlay (max 76 wide), dim background,
double-line border in column accent colour, 'unsaved' indicator when dirty
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Chris Hendrickson
21d3814da4