Agents view: make New task a full project-aware composer

What variant of Codex are you using?

Codex Agents view on macOS.

What feature would you like to see?

Make New task in the Agents view a full-size grey multiline composer, matching the regular Codex composer.

The composer should:

• show the destination local project before the task starts and let the user change it;
• use a multiline textarea rather than the current compact input;
• support standard macOS word editing: Option-Left and Option-Right move by word, and Option-Delete deletes the preceding word; and
• keep the destination project visible beside the submit control, so a global New task action cannot silently reuse an unrelated project's working directory.

Additional information

The current global New task flow can place a task under an unintended project when its inherited project is not clear before submission.

#25498 covers moving an existing thread between projects. This request is about preventing the wrong binding at creation time and making the Agents-view composer behave like the regular Codex composer.

Start by locating the macOS Agents view's New task flow and comparing it with the regular Codex composer. Trace how the destination project is selected or inherited, then inspect the composer’s text editing and submit controls. Done means a full-size multiline composer shows and can change the destination before submission, supports the specified macOS word-editing shortcuts, and keeps that project visible beside submit.