[BUG] Send button (submit icon) missing from input field in Desktop app (Windows)

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?

The send/submit button (small square icon) next to the input field has disappeared in the Claude Code Desktop app on Windows. The only way to send a message is by pressing Enter. The microphone icon is visible, but no send button appears when text is typed in the input field.

See attached screenshot showing the missing button area (red box highlights where the send button should be, but only the microphone/stop icon is visible).

What Should Happen?

A send button should appear next to the microphone icon when text is entered in the input field, allowing users to submit messages by clicking it.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Code Desktop app on Windows 11
2. Type any text in the input field
3. Notice that no send button appears — only the microphone icon is visible
4. Messages can only be sent via the Enter key

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Latest (always kept up to date)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

• Terminal: Claude Code Desktop App (Windows native app, not CLI in a terminal)
• OS: Windows 11 Home 10.0.26200
• Model: Opus 4.6 (1M context)
• Plan: Max plan

The stop button (circle with square inside) appears correctly when Claude is processing a message, but the send button does not appear when text is typed in the input field.