lukasandClaude Opus 5
550b8cf503
The first column listed a thread's `participants`, which the threader builds from from + to + cc — so every ordinary email read "Sender, You", and the +N badge beside the avatar counted the user themselves. `participants` cannot simply be narrowed: the subject-fallback join matches an incoming message's recipients against it (threader._by_subject), so dropping recipients would change how mail is threaded. Hence a separate `threads.senders`, holding only from addresses, newest writer first — which is also the right thing for a conversation where several people replied. Migration 0019 backfills it, so existing threads do not wait to be touched again. The list falls back to `participants` if a row somehow has no senders, rather than rendering an empty column. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018SqJYt7jD7oUEkoY68sBZo