Codex app

# Codex app ### New features - Added pull request status badges in task rows and PR buttons, including draft, open, merged, and closed states. - Added a Worktrees setting to choose how many Codex-managed worktrees to keep before older ones are cleaned up. ### Performance improvements and bug fixes - Improved scrolling and navigation in long conversations and code review, including fixes for thread jumpiness, sidebar jitter, and diff scrolling. - Improved app startup reliability and keyboard zoom behavior. - Additional performance improvements and bug fixes.