Codex app

# Codex app ### New features - Added local branch search and non-image file pasting in the composer. - Added collapsible sidebar sections, tray usage-limit surfacing, and a command-palette theme switcher. ### Performance improvements and bug fixes - Made review faster and more stable with better diff batching and preserved diff and search state. - Fixed projectless cwd and permissions handling, default file opening, spreadsheet suggestions, and remote-control reconnect issues. - Additional performance improvements and bug fixes.