[Bug]: Cmd+Enter in the citation comment box sends the message but leaves it in the composer #33414

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

apps/web

Steps to reproduce

1. In any thread with an assistant reply, type some text in the composer (e.g. check it again ).
2. Select some assistant text and click Cite. The citation chip is inserted and the "Add an optional comment..." box opens.
3. Leave the comment empty and press Cmd+Enter in the comment box (save and send).

Expected behavior

The message is sent and the composer clears, the same as sending any other way.

Actual behavior

The message is sent and a turn starts, but the composer still holds the same text and citation chip. It stays there after the turn ends. Sending it again would post a duplicate.

Only the Cmd+Enter save-and-send path does this. In the same session, on the same build:

In the code, the comment box's save-and-send (onSaveAndSend in ComposerPromptEditorTiptap.tsx) saves the comment into the citation node and then calls submitComposer right away (submitCitationAndSend in ChatComposer.tsx). Something on that path restores the old prompt after the send clears it. I haven't found the exact step.

Impact

Minor bug or occasional failure

Version or commit

Reproduced on main @ 6647b0a (dev build). First seen in the T3 Code desktop app.

Environment

macOS 15.1. Reproduced in an isolated dev build (vp run dev, the dev home folder) with the Replay (dev) provider, so it doesn't depend on the provider. First seen with Claude (claude-opus-5-5).

Screenshots, recordings, or supporting files

Workaround

Press Enter (Save) in the comment box first, then send from the composer. Or clear the composer by hand after sending.

Investigated and drafted by Claude Code (claude-opus-5-5) running inside T3 Code.