Remote Control (iOS): closing a fullscreen code block exits the whole conversation instead of just the code view

Closing a code snippet that was opened in fullscreen view dismisses the entire Claude Code conversation and lands on a different conversation, rather than returning to the thread.

Steps to reproduce

1. Start a Remote Control session (/rc) on desktop.
2. Open the conversation on the iOS Claude app.
3. Tap a code snippet to open it in fullscreen view.
4. Close the fullscreen code view.

Expected behavior

The code view closes and I'm back in the same conversation, scroll position intact.

Actual behavior

The close action dismisses the whole conversation view and navigates to a different conversation.