- normalize.ts: Restore #channel-name → undefined (directory lookup) fix
that was lost during PR consolidation. Also restore strict ID matching
in looksLikeMattermostTargetId (26-char alnum only, not loose 3+ regex).
- interactions.ts: Add dispatchButtonClick callback so the agent responds
immediately to button clicks. Show the clicked button's display name
(not raw action ID) in the "selected by" confirmation message.
- monitor.ts: Wire up dispatchButtonClick with full reply pipeline
(routing, typing indicator, chunking, dispatchReplyFromConfig).
- interactions.test.ts: Update test to expect sanitized action IDs.
970b62b676