Quoted replies find their way home
Click the quoted strip above a reply and the chat now pages back through history until it reaches the original, spotlights it, then offers a button back to the newest messages. Before, a refreshed tab just sat there.
You open a chat after lunch, scroll to a reply quoting something from last week, and click the quote. The thread shuffles backward, settles on the original, rings it in the accent color, and a Back to present button waits at the bottom of the screen.
Credit goes to xHeaven, who taught the thread to walk backward. If the original is already on screen, the click jumps straight to it. If not, the chat asks for older pages 50 messages at a time, sharing one request with any scroll already loading that page, until the quote turns up. It centers the bubble and flashes it for 1,200 milliseconds, and the return button shows a spinner plus 'Loading original message' for screen readers while it digs.
One catch. It only walks backward. If the original isn't older than the oldest message you already hold, which can happen when loaded history has a hole in the middle, it fetches nothing and just shows 'Could not load this message. Try again.' A failed page does the same.