feat(apple): storage screen, About content, and fixes

- Settings: add Storage screen (size breakdown + delete-all-transfers) and
  expand About (what it is/isn't, privacy & security, license/source)
- Move Report a bug to a toolbar sheet (cancel-only unless empty)
- Send progress: derive the list-row bar from receiver delivery status so it
  clears once every receiver completes
- Fixes: iPad orientations, onChange(of:) iOS 17 API, weak-self captures,
  invalid SF Symbol, macOS bug-report form labels; bump core build target to
  match the app (18.2/15.0)

apple/VniDrop/UI/Components/Components.swift

@@ -94,30 +94,3 @@ struct Field: View {
 	}
 }
 
-// MARK: - EmptyStateView
-
-/// Native-styled empty state (iOS 16 compatible; avoids iOS 17
-/// `ContentUnavailableView`).
-struct EmptyStateView<Actions: View>: View {
-	let systemImage: String
-	let title: String
-	let message: String
-	@ViewBuilder var actions: () -> Actions
-
-	var body: some View {
-		VStack(spacing: 12) {
-			Image(systemName: systemImage)
-				.font(.system(size: 52))
-				.foregroundStyle(.secondary)
-			Text(title).font(.title2).fontWeight(.semibold).multilineTextAlignment(.center)
-			Text(message)
-				.font(.body).foregroundStyle(.secondary)
-				.multilineTextAlignment(.center)
-				.frame(maxWidth: 420)
-			actions().padding(.top, 4)
-		}
-		.frame(maxWidth: .infinity)
-		.padding(.horizontal, 24)
-		.padding(.vertical, 48)
-	}
-}