Messages MacCatalyst xcode26.0 b4

#Messages.framework

diff -ruN /Applications/Xcode_26.0.0-beta3.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/iOSSupport/System/Library/Frameworks/Messages.framework/Headers/MSMessagesAppViewController.h /Applications/Xcode_26.0.0-beta4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/iOSSupport/System/Library/Frameworks/Messages.framework/Headers/MSMessagesAppViewController.h
--- /Applications/Xcode_26.0.0-beta3.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/iOSSupport/System/Library/Frameworks/Messages.framework/Headers/MSMessagesAppViewController.h	2025-07-02 02:32:42
+++ /Applications/Xcode_26.0.0-beta4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/iOSSupport/System/Library/Frameworks/Messages.framework/Headers/MSMessagesAppViewController.h	2025-07-17 02:43:52
@@ -54,6 +54,13 @@
 @property (nonatomic, readonly, nullable) UIColor *messageTintColor API_AVAILABLE(ios(26.0));
 
 /*!
+ @property  messageCornerRadius
+ @abstract   The corner radius of the message when presented in the transcript. Use this value to create concentric rounded subviews inside your view. Use continuous corners (kCACornerCurveContinuous) on your view.
+ @discussion This property varies with dynamic type size. Use trait collection registration to trigger an updated layout when dynamic type size changes. To avoid the edges of the transcript view, use `layoutMargins`. This value is only valid when `presentationStyle` is `MSMessagesAppPresentationStyleTranscript`.
+ */
+@property (nonatomic, assign, readonly) CGFloat messageCornerRadius API_AVAILABLE(ios(26.0));
+
+/*!
  @method     invalidateMessageTintColor
  @abstract   Call this when `messageTintColor` changes, e.g. due to change in app state or trait collection.
  @discussion The message will be updated to reflect the new color. This method will only work if the `presentationStyle` is `MSMessagesAppPresentationStyleTranscript`.