Stream Chat

A chat UI must converge after offline periods, edits, moderation, and events arriving in a different order.

• Keep channel and message IDs stable.
• Reconcile recent state after reconnect.
• Process webhook and client events idempotently.
• Define unread counts from a documented last-read position.
• Enforce roles outside visual controls.

Test multi-device sessions, deleted parent messages, thread replies, member removal, slow attachments, and token expiry. Minimize retained chat data and avoid storing message text in diagnostics.