[BUG] Remote Control push notifications have no sound or vibration on iOS

Summary

Push notifications from Claude Code Remote Control arrive silently on iPhone — no sound and no vibration, regardless of iOS notification settings.

Environment

• Device: iPhone 15 Pro (iOS)
• Claude app: latest version
• Feature: Remote Control (push notifications via PushNotification tool)

Steps to Reproduce

1. Connect iPhone to Claude Code via Remote Control
2. Trigger a push notification (e.g., via PushNotification tool or long-running task completion)
3. Observe notification arrives in notification center with no sound or vibration

Expected Behavior

Notification arrives with sound and/or vibration, consistent with other apps.

Actual Behavior

Notification arrives silently. No sound, no vibration.

What I've Tried

• Disabled Focus/Do Not Disturb mode
• Disabled "Attention Aware Features"
• Verified Claude app notification settings: Banner, Sound, Badge all enabled
• Restarted iPhone and Claude app
• All other apps with same settings produce sound + vibration normally

Notes

The notification payload appears to be sent as silent — iOS settings alone cannot override this. The app likely needs to include sound and/or badge in the APNs payload.