Fix native OOM crash caused by ImageManipulator failure falling back to massive raw sensor capture

src/screens/CameraScreen.tsx

@@ -309,12 +309,15 @@ export default function CameraScreen({
         const manipResult = await ImageManipulator.manipulateAsync(
           capturedUri,
           actions,
-          { compress: 0.9, format: ImageManipulator.SaveFormat.JPEG }
+          { compress: 0.9, format: 'jpeg' as any }
         );
         capturedUri = manipResult.uri;
         console.log('Successfully manipulated and cropped image');
       } catch (manipError) {
-        console.error('Failed to manipulate image, proceeding with original:', manipError);
+        console.error('Failed to manipulate image, preventing OOM crash!', manipError);
+        alert('Fehler bei der Bildverarbeitung! Das Bild ist zu groß oder das Format wird nicht unterstützt.');
+        onCancel();
+        return; // Abort here so we don't send a 16MB raw image to PreviewScreen
       }
 
       // Auto-save individual photo to gallery

src/screens/PreviewScreen.tsx

@@ -185,7 +185,15 @@ export default function PreviewScreen({
 
   // ── Capture the final image ──
   const captureComposite = async () => {
+    try {
+      if (viewShotRef.current) {
+        return await viewShotRef.current.capture();
+      }
       return currentPhoto;
+    } catch (e) {
+      console.error('Failed to capture composite:', e);
+      return currentPhoto;
+    }
   };
 
   // Triggers the view capture and the print job
@@ -356,7 +364,9 @@ export default function PreviewScreen({
         activeOpacity={1}
         onPress={handleCanvasPress}
       >
-        <View
+        <ViewShot
+          ref={viewShotRef}
+          options={{ format: 'jpg', quality: 0.95 }}
           style={styles.viewShotContainer}
         >
           {renderCollageView()}
@@ -384,7 +394,7 @@ export default function PreviewScreen({
               onUpdate={handleStickerUpdate}
             />
           ))}
-        </View>
+        </ViewShot>
 
         {/* Sticker Tray (outside ViewShot — not captured) */}
         {showStickerTray && (