Add a setting for in-app browser annotation Enter behavior

What is the feature request?

Please add a Codex app setting to customize the Enter-key behavior for in-app browser comments/annotations.

This follows #22719, where the immediate-send behavior was clarified as intentional. The request here is not only to revert the default, but to make the behavior configurable.

Current behavior

In the in-app browser annotation editor:

• Enter sends the current browser comment immediately to the conversation.
• Cmd+Enter commits/saves the current annotation and allows continuing to add more annotations before sending the final message.

For users whose main chat composer is configured to use Cmd+Enter to send, this creates an inverted shortcut model inside the same app:

• Main chat composer: Cmd+Enter = send.
• Browser annotation editor: Enter = send, Cmd+Enter = keep batching annotations.

That is hard to build muscle memory around.

Why this matters

A common workflow is to review a page, leave multiple precise annotations on different UI elements, and then send them as one batch to the agent. The new default makes this workflow more error-prone because a single Enter sends prematurely and exits the annotation collection flow.

At the same time, some users may prefer the new immediate-send behavior. That is exactly why this should be a user preference rather than a single fixed behavior.

Suggested setting

Add a setting such as:

In-app browser annotation Enter behavior

Options:

1. Enter sends immediately
2. Enter saves annotation / Cmd+Enter sends final message

Or phrase it around “single-comment mode” vs “batch annotation mode”.

The important part is that users who rely on multi-annotation batching can restore the previous workflow, while users who prefer immediate sending can keep the new default.

Environment

• Codex desktop app on macOS
• Observed after updating to 26.513.31313 / build 2867