fix: iOS Safari AddToMenu visibility issue (#573)
- bump z-index above Player (backdrop: 199, dropdown: 200)
- add translateZ(0) to force GPU layer and fix iOS stacking context
- add explicit width constraints
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
authored by