iOS example app UX improvements

[psdewar]

Learned how live streaming works this weekend and found this repo. The iOS example app was a good starting point for these changes:

UI Improvements

• Redesigned PublishView with compact, modern controls
• Added 44pt touch targets for better accessibility
• Live stream timer updates every second (was 10s)
• Upload speed graph with real-time thermal state indicator
• FPS selector (15/30/60) with horizontal icon row
• Stream countdown animation on "GO LIVE"
• Updated filter experience and added two more, "warm" and "vivid"

Help

• Added two-tab swipeable Help sheet in Preferences (Preference | Publish)
• Detailed explanations for all settings and controls
• Clarified "System PiP" (background streaming) vs "Dual Camera" (in-stream overlay)

Code Quality

• Renamed isPiPEnabled/togglePiP → isDualCameraEnabled/toggleDualCamera for clarity
• Added ViewType.displayName to show "System PiP" instead of "pip"
• Capped stats array at 60 entries for chart performance
• Added timer cleanup on view disappear to prevent memory leaks
• Improved PlaybackView error messages with user-friendly explanations

Screenshots:

Before

Publish Screen	Help Sheet
	N/A

After

Publish Screen	Help Sheet

[shogo4405]

That’s cool. I think it looks good. Thank you.