User requirement: health tab should show recent XMPP conversations.
- bot hooks log_xmpp on inbound (on_msg) and outbound (_deliver_loop)
so real chats land in xmpp_messages.jsonl (was: only cron/scanner)
- index.html health tab: new '最近对话' panel (last 10 msgs, dir arrow,
preview, status, time); refreshHealth updates it incrementally
- last_error now shows age and resolved state: once a successful
outbound happens after an error, it's shown gray as '已恢复'
instead of alarming red forever; unresolved errors still red
- health() status no longer degraded by errors that were later
resolved by successful outbound
hmo
058c42ce27