* fix(channel/qq): deliver HITL approval prompts reliably
QQ approval prompts were silently dropped when the markdown send hit
a QQ server-side error (e.g. template not configured, content audit)
because the fallback path only matched TypeError / specific string
patterns, and the plain-text retry reused the already-consumed
msg_seq which QQ then rejects as duplicate.
- Consume a fresh msg_seq for the plain-text fallback send
- Recognize QQ server error codes (304014/304023/304003/40034059)
and CN fragments ("模版"/"审核") as markdown-fallback triggers
- Promote send failure logs from debug to warning/error with
chat_id/msg_id/seq so real-world errors can be diagnosed
- Extend test_qq_channel with a server-error-code fallback case
* style(channel/qq): apply ruff formatter to approval-delivery fix
* Fix
Ziheng Zhang
bd501cce34