Small tweaks to the ML Intern Slack bot (#2739)
Slack: drop status header, mark finished requests with ✅, allow tagging requesters
- The status card no longer opens with a bold "Session status" line.
- Once a run finishes, the 👀 on each request it answered is swapped for ✅
(btw answers too). Each request is flagged so the swap happens once.
- Replies can tag people who asked the bot something in the thread. Other
user mentions, @channel/@here and mentions inside code stay escaped.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
