Naiyuan Qing f410799ab5 fix(subscribers): prevent duplicate subscriber entries from optimistic update + WS race ... When subscribing, both the optimistic setSubscribers and the WS subscriber:added event could add the same entry. Now both paths check for existing entries using (user_id + user_type) composite key before appending. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>		2026-03-28 20:59:35 +08:00
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web	fix(subscribers): prevent duplicate subscriber entries from optimistic update + WS race	2026-03-28 20:59:35 +08:00