- #6: the server echoes your own sent message back over the socket; onChatMessage reset
last_status='sent', overwriting a delivered/read that arrived first → the chat-list tick
flipped back to single. Track last_msg_id and never downgrade the same message's tick.
- #3: pin the 'You' note-to-self chat in its own slot — tinted row + 'Note to self' tag +
a divider separating it from the conversation list.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>