The composite mode control (#planModeBtn) now opens a dropdown menu
instead of cycling, following the emoji-picker pattern: each mode is an
entry with icon + label + description, the active one marked with a
check. Direct jumps between modes are now possible, so selecting
plan/ultracode resets the persisted panel mode to avoid running both the
panel and the CLI worker. Unified the active button states.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>