macOS dictation (fn key double-press) doesn't work reliably in Claude Code

When using Claude Code's input prompt, the macOS system dictation feature (triggered by pressing the Function/fn key twice) does not work reliably. Sometimes it requires multiple attempts to activate, or doesn't activate at all.

Steps to Reproduce:

1. Open Claude Code in terminal
2. Click in the input prompt area
3. Press the fn (Function) key twice quickly to activate macOS dictation
4. Observe that dictation often fails to start

Expected Behavior:
Dictation should start reliably on the first double-press of the fn key, as it does in other applications.

Actual Behavior:
Dictation frequently fails to activate, requiring multiple attempts or not working at all.

Environment:

• Claude Code Version: 2.0.37
• macOS Version: 26.2 (Build 25C56)

Additional Context:

• This issue is specific to Claude Code - macOS dictation works correctly in all other applications
• Dictation settings in System Settings → Keyboard → Dictation are configured correctly

Workaround:
Changing the dictation trigger to a keyboard shortcut (e.g., "Press Left Command Key Twice") instead of the fn key double-press may work better.