Desktop app: ⌘1/⌘2/⌘3 shortcuts to switch between Chat/Cowork/Code modes don't work

Bug description

The keyboard shortcuts ⌘1, ⌘2, ⌘3 displayed as tooltips on the Chat/Cowork/Code tab buttons in the Claude desktop app do not work.

Steps to reproduce

1. Open the Claude desktop app
2. Press ⌘1, ⌘2, or ⌘3
3. Nothing happens — the mode does not switch

Expected behavior

Pressing ⌘1 should switch to Chat mode, ⌘2 to Cowork, ⌘3 to Code, as shown in the button tooltips.

Workaround attempted

• Removed ⌘1/2/3 shortcuts from Arc browser → did not fix
• Confirmed Magnet and Slack are not intercepting these shortcuts globally
• keybindings.json does not appear to be supported in the desktop app

Environment

• macOS, Claude desktop app (com.anthropic.claudefordesktop)