viewmodifier for backwards compat

NearFuture/Views/Events/AddEventView.swift

@@ -57,7 +57,7 @@ struct AddEventView: View {
 									selection: $event.symbol
 								)
 								.presentationDetents([.medium])
-								.presentationSizing(.form)
+								.modifier(presentationSizeForm())
 							}
 							TextField("Event Name", text: $event.name)
 								.textFieldStyle(.roundedBorder)

Shared/ViewModifiers.swift

@@ -63,3 +63,13 @@ struct navigationInlineLarge: ViewModifier {
 #endif
 	}
 }
+
+struct presentationSizeForm: ViewModifier {
+	func body(content: Content) -> some View {
+		if #available(iOS 18, macOS 15, *) {
+			content.presentationSizing(.form)
+		} else {
+			content
+		}
+	}
+}