Modal Sheet Debugger

Fix sheet presentation issues:

1. Find competing sheets: Multiple .sheet() modifiers on same view

2. Consolidate pattern:

   swiftCopy

   enum SheetType: Identifiable {
       case optionA, optionB
       var id: String { ... }
   }
   @State var activeSheet: SheetType?
   .sheet(item: $activeSheet) { type in
       switch type { ... }
   }
   

3. Fix dismissal: Update binding before dismiss()

4. Check bindings: Ensure parent and environment in sync

Use when: Multiple sheets conflict, dismissal bugs, sheet state issues