Fix window position conversion for macOS

Added NSPointExt::bottomLeftForWindow to correctly convert top-left window positions to bottom-left coordinates by accounting for window height. Updated Window::SetPosition to use the new method, ensuring accurate window placement.

Author: lijy91

src/platform/macos/coordinate_utils_macos.h

@@ -26,16 +26,26 @@ struct NSRectExt {
 
 // NSPoint extension-like helper for coordinate system conversion
 struct NSPointExt {
+  // Convert bottom-left point to top-left point
   static CGPoint topLeft(NSPoint point) {
     NSRect primaryScreenFrame = [[NSScreen screens][0] frame];
     return CGPointMake(point.x, primaryScreenFrame.size.height - point.y);
   }
 
-  // Convert from top-left coordinate system to bottom-left (macOS default)
+  // Convert top-left point to bottom-left point
+  // Note: For window positions, use bottomLeftForWindow instead, as it requires window height
   static NSPoint bottomLeft(CGPoint topLeftPoint) {
     NSRect primaryScreenFrame = [[NSScreen screens][0] frame];
     return NSMakePoint(topLeftPoint.x, primaryScreenFrame.size.height - topLeftPoint.y);
   }
+  
+  // Convert top-left window position to bottom-left window position
+  // This is the correct method for converting window positions, as it accounts for window height
+  static NSPoint bottomLeftForWindow(CGPoint topLeftPoint, CGFloat windowHeight) {
+    NSRect primaryScreenFrame = [[NSScreen screens][0] frame];
+    double bottomY = primaryScreenFrame.size.height - topLeftPoint.y - windowHeight;
+    return NSMakePoint(topLeftPoint.x, bottomY);
+  }
 };
 
 }  // namespace nativeapi

src/platform/macos/window_macos.mm

@@ -280,8 +280,10 @@
 
 void Window::SetPosition(Point point) {
   // Convert from topLeft coordinate system to bottom-left (macOS default)
-  NSPoint topLeftPoint = {point.x, point.y};
-  NSPoint bottomLeft = NSPointExt::bottomLeft(topLeftPoint);
+  // We need the window height to correctly convert the top-left position
+  NSRect frame = [pimpl_->ns_window_ frame];
+  CGPoint topLeftPoint = {point.x, point.y};
+  NSPoint bottomLeft = NSPointExt::bottomLeftForWindow(topLeftPoint, frame.size.height);
   [pimpl_->ns_window_ setFrameOrigin:bottomLeft];
 }