Implement Dynamic Island support for live session status

[BillSteinUNB]

Summary

Implement Dynamic Island support to show live coding session status and notifications in the iOS Dynamic Island.

Context

Dynamic Island (iOS 16+) provides a way to show live activities and notifications in the pill-shaped area at the top of the screen. This would be a compelling feature for WhisperCode to show real-time session status without needing to open the app.

Use Cases

1. Session Status - Show when the AI agent is:

   • Thinking/processing
   • Running a command
   • Waiting for permission
   • Completed a task

2. Progress Updates - Display ongoing operations like:

   • File edits in progress
   • Commands being executed
   • LLM responses streaming

3. Quick Notifications - Deliver important alerts through Dynamic Island:

   • Errors requiring attention
   • Permission requests
   • Session completed

Technical Considerations

• Use iOS ActivityKit framework for Live Activities
• Design appropriate layouts for compact and expanded Dynamic Island views
• Handle cases where Dynamic Island is not available (older iOS, iPad)
• Consider battery implications of live activities
• Ensure notifications also appear in Notification Center when app is backgrounded

Relationship to Notifications

This complements the server-driven push notification system (#5):

• Live Activities show real-time in-app status
• Push notifications deliver background events
• Together they provide comprehensive notification coverage

Implementation Scope

• Add ActivityKit entitlement and capabilities
• Create Live Activity widget extension
• Design Dynamic Island layouts (compact, minimal, expanded)
• Integrate with session state management
• Handle start/update/end of live activities

Labels

• enhancement
• ios-specific