Live "catch me up" summary + key points (per meeting)

[YJack0000]

Goal

A live, rolling "catch me up" view per meeting: a continuously-updated summary + key points of the conversation so far, so when the user returns to a meeting (or switches to it) they can re-orient in seconds. While they're away, the AI is effectively holding the meeting.

Tasks

• Incremental summarizer: maintain a rolling summary + "key points so far" + "what's being discussed right now" from the live transcript; update on an interval / on meaningful change (debounced, cheap).
• "Where we are now" highlight: the last decision/question/ask, and any open thread directed at the user.
• On return / on switching to a session, present the catch-up prominently ("here's what you missed").
• Reuse the post-meeting debrief machinery, but live and incremental (don't regenerate from scratch each tick).
• Token cost control: summarize deltas, not the whole transcript each time.

Notes

• Useful even for the normal local (tap) mode — catch up on a meeting you zoned out in.
• Pairs with multi-session switching (#session-model): switch to a meeting → instant catch-up.

Part of the "Multi-meeting co-pilot & catch-up mode" epic.