[BUG] macOS Desktop: Permission prompt has no Enter keybinding — requires ⌘⇧↵ / ⌘↵ only

Description

On macOS Claude Code Desktop, the permission prompt does not respond to the Enter key at all. The only available keybindings are:

• Allow once: ⌘⇧↵ (Cmd+Shift+Enter)
• Always allow: ⌘↵ (Cmd+Enter)
• Deny: Esc

There is no way to approve a permission with just Enter, which is the default behavior in the CLI version.

Comparison with Windows

Per #48550, Windows Desktop users can press Enter on the permission prompt (it triggers "Always allow" there). On macOS, Enter does nothing — it is not mapped to any action.

Additional context

• ~/.claude/keybindings.json with "enter": "confirm:yes" in the Confirmation context has no effect on Desktop — the file appears to be ignored entirely.
• Removing keybindings.json does not change the behavior — macOS Desktop simply has no Enter mapping for the permission prompt.
• The CLI version defaults to Enter = Allow once, which is the expected behavior.

Expected behavior

Enter should map to "Allow once" on the permission prompt, consistent with CLI behavior and the principle of least privilege.

Environment

• Platform: macOS (Apple Silicon)
• App: Claude Code Desktop