Review finding (quality pass): on a single-profile gateway,
_handle_busy_command set _busy_input_mode but left _busy_text_mode
stale, so the adapter refresh a line later re-read the old value —
/busy queue persisted to config but live text messages kept
interrupting until restart. The profile path already re-derives both
from the fresh config; the non-profile path now does the same via
_load_busy_text_mode() (busy_input_mode is the source of truth,
run.py:9877). Regression assertion added to test_set_mode_persists;
verified red without the production fix.
Teknium review items:
1. Parse with event.get_command_args() instead of raw event.text
(matching _handle_fast_command pattern at line 2842)
2. Add mocked persistence tests for queue/steer/interrupt setter
success, save-failure, and exception branches (5 new tests)
Removes cli_only=True from /busy CommandDef and adds gateway
handler with subcommand dispatch (status/queue/steer/interrupt).
Applied on top of latest upstream/main while preserving original
commit intent from PR #18366.
Also adds smoke tests for the gateway /busy command handler.