[BUG] claude agents view: dispatch prompt has no undo (chat:undo), unlike the main REPL

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

In the claude agents background-agent view, the dispatch prompt ignores undo. You type a prompt to start a background session, edit part of it, press undo, and nothing changes. In a normal claude session that same edit is undoable: chat:undo is bound to <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>-</kbd> and reverts the last change. The agent-view prompt behaves as if chat:undo was never wired up, and it doesn't pick up the Chat keybindings either. Setting chat:undo in ~/.claude/keybindings.json doesn't help, because that only affects the Chat context and the agent-view prompt doesn't read it.

What Should Happen?

Undo in the agent-view dispatch prompt should revert the last edit, the same way it does in the main prompt.

Error Messages/Logs

None. No error is produced; the keypress is silently ignored.

Steps to Reproduce

1. Run claude agents to open the background-agent view.
2. Type into the dispatch prompt, then delete or change part of what you typed.
3. Press <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>-</kbd> (or your chat:undo binding).

Claude Model

Not sure / Multiple models

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.211 (Claude Code)

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_