[BUG] Cmd+; triggers in-app text zoom instead of opening Side Chat in Code tab (macOS)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

In the Code tab of Claude Desktop (macOS), pressing Cmd+; zooms the text inside the app instead of opening a Side Chat. The shortcut is correctly listed as "Side Chat" in the shortcut reference (Cmd+/), but the actual behavior is text magnification.

Additionally, typing /btw [question] in the prompt box is treated as a regular next message in the main thread rather than triggering the side chat overlay.

What Should Happen?

The Side Chat panel should open, allowing a question to be asked using the session's context without adding it to the main conversation thread.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Desktop (macOS, latest version)
2. Navigate to the Code tab
3. Start a session with a project folder
4. Press Cmd+;

→ Observe: text in the app zooms in instead of opening a Side Chat panel

1. Type "/btw test" in the prompt box and press Enter

→ Observe: sent as a regular chat message in the main thread, no overlay

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.195

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

• macOS Accessibility → Zoom keyboard shortcuts: Cmd+; is NOT assigned at the system level, so this is not a system shortcut conflict.
• The shortcut list (Cmd+/) correctly shows Cmd+; → Side Chat.
• No UI button for Side Chat is visible in the prompt box area.

Related / previously reported but auto-closed without team response:

• #45399 (Desktop app missing slash commands /btw, /compact, /diff)
• #66457 (/btw + Ctrl+; zoom on Windows, closed as duplicate)
• #33129 (/btw not working in CLI)
• #48099 (side chat feature request)

Regression note: /btw worked correctly in a previous version (used as a side-chat trigger).
Whether Cmd+; ever worked is unknown — it may have always triggered zoom on this setup.

This appears to be a recurring, still-unresolved issue across multiple environments.

• Claude Desktop app version: 1.15962.1 (1e236d) 2026-06-26T19:44:44.000Z
• Claude Code engine version: 2.1.195 (Code tab session)
• Platform: Desktop app — Code tab (not a terminal)
• Operating System: macOS 26.5.1 (25F80)