Quick commands of type "alias" that target built-in slash commands
(e.g. /h -> /model) were processed too late in _handle_message — after
the if-canonical=="model" checks. This meant alias expansion never
reached the target handler and fell through to the LLM as raw text.
Two fixes:
1. Move the quick_commands block before built-in dispatch so alias
targets (like /model) hit the correct handler after expansion.
2. Extract bare command name from target_command via .split()[0] to
feed _resolve_cmd() correctly (was using the full arg-string).
74c997d985