fix(transcription): fix transcription in dark mode

WorterBuch/HandwritingRecognizer.swift

@@ -40,9 +40,13 @@ class HandwritingRecognizer {
         context.setFillColor(UIColor.white.cgColor)
         context.fill(CGRect(origin: .zero, size: bounds.size))
 
-        // Draw the PKDrawing
-        let drawingImage = drawing.image(from: bounds, scale: scale)
-        drawingImage.draw(at: .zero)
+        // Force light mode appearance to ensure dark ink on white background
+        let lightTraits = UITraitCollection(userInterfaceStyle: .light)
+        var drawingImage: UIImage!
+        lightTraits.performAsCurrent {
+            drawingImage = drawing.image(from: bounds, scale: scale)
+        }
+        drawingImage.draw(at: CGPoint.zero)
 
         guard let image = UIGraphicsGetImageFromCurrentImageContext() else {
             UIGraphicsEndImageContext()