Direct thread switching with Cmd+1..9 in Codex desktop app

Problem

In the Codex desktop app, moving between threads currently relies on sequential navigation (Cmd+Shift+[ / Cmd+Shift+]) or search (Cmd+K).
For users who keep multiple active threads, this is slower than direct index-based switching.

Requested behavior

Add direct thread switching shortcuts:

• Cmd+1 -> first thread
• Cmd+2 -> second thread
• ...
• Cmd+9 -> ninth thread

Why this helps

• Matches common tab-switching patterns in many desktop apps.
• Reduces navigation friction for power users.
• Improves keyboard-only workflow significantly.

Optional extensions

• Allow customizing these bindings in Settings.
• If Cmd+1..9 conflicts with existing behavior, provide an opt-in toggle.

Environment

• Codex desktop app (macOS)
• Date: 2026-02-14