fix: match Market's accessibility corner radius calculation

Change cornerRadius + accessibilityPathInset to
cornerRadius - accessibilityPathInset so the outset radius matches
Market's UIView+Accessibility helper (radius - (-2) = radius + 2).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: RoyalPineapple

BlueprintUIAccessibilityCore/Sources/AccessibilityDeferral.swift

@@ -102,7 +102,7 @@ extension AccessibilityDeferral {
         ///   - cornerRadius: The radius for rounded corners
         public static func frame(_ rect: CGRect, cornerRadius: CGFloat = accessibilityCornerRadius) -> Self {
             .init {
-                UIBezierPath(roundedRect: rect, cornerRadius: max(0, cornerRadius + accessibilityPathInset))
+                UIBezierPath(roundedRect: rect, cornerRadius: max(0, cornerRadius - accessibilityPathInset))
             }
         }
 
@@ -124,7 +124,7 @@ extension AccessibilityDeferral {
                 let cornerRadius = view.layer.cornerRadius > 0 ? view.layer.cornerRadius : accessibilityCornerRadius
                 return UIBezierPath(
                     roundedRect: convertedFrame,
-                    cornerRadius: max(0, cornerRadius + accessibilityPathInset)
+                    cornerRadius: max(0, cornerRadius - accessibilityPathInset)
                 )
             }
         }