[BUG] Desktop app (macOS): auto-paste from external dictation apps fails since 2.19675.0

Summary

Since the Claude desktop app updated to 2.19675.0 (installed 2026-10-01), external
dictation apps can no longer auto-paste their transcript into the Claude input box.
The dictation app reports "Couldn't paste automatically" and leaves the text on the
clipboard. Manual Cmd+V into the same box works.

Environment

• Claude desktop 2.19675.0, macOS 26.2 (Apple Silicon)
• Dictation: ChatGPT desktop app voice input (26.917.51856), unchanged since 2026-09-22

Steps to reproduce

1. Click into the Claude desktop input box (chat or Code tab).
2. Start voice input in the ChatGPT app and speak.
3. Stop dictation.

Expected

The transcript is pasted into the Claude input box, as it was before the update.

Actual

A "Text copied - Cmd+V to paste / Couldn't paste automatically" toast appears and
nothing is inserted. Pressing Cmd+V manually inserts the text.

Notes

• The same dictation app auto-pastes fine into every other app on the same machine.
• Not caused by Secure Input (no process holds it).
• Already tried: quit and relaunch Claude, toggle ChatGPT off/on under

Privacy & Security > Accessibility, relaunch ChatGPT. No change.

• Worked earlier the same day, before the app restarted into the new version.