- Single modal with two steps (label then color) instead of
bare text prompts dropped to terminal
- Default label is <agent_name>-<slug_suffix>; first keystroke
replaces the pre-fill rather than appending to it
- Color step shows a navigable list with live color preview;
(none) selected by default; Esc skips
- Modal lives in tui.py and is shared between supervisor flow
and cmd_start
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>