Fix notes unread status (#7643)

1. The client-side comparison was wrong
2. The server never told the client about the version it remembered
3. The server generated broken timestamps in some cases

Release Notes:

- Fixed the notes/chat appearing as unread too often

**or**

- N/A
68893c2ae6Conrad Irwin committed on 2/10/2024, 6:12:26 AM· committed by GitHubparente2a3e89
9 files changedLine totals unavailable