build: add debug APK and local changes

src/screens/CameraScreen.tsx

@@ -621,32 +621,29 @@ export default function CameraScreen({
   };
 
   return (
-    <Animated.View entering={FadeIn.duration(400)} exiting={FadeOut.duration(300)} style={styles.container}>
+    <View style={styles.container}>
       {/* Camera Preview Background */}
       <View style={styles.previewContainer}>
         <View style={styles.cameraWrapper}>
-          {Platform.OS === 'android' && isUsbConnected ? (
-            <UsbCameraView ref={usbCameraRef} style={styles.cameraPreview} />
-          ) : (
-            <CameraView
-              ref={expoCameraRef}
-              style={styles.cameraPreview}
-              facing="front"
-              pictureSize={pictureSize === 'fallback' ? undefined : pictureSize}
-              onCameraReady={handleCameraReady}
+          {Platform.OS === 'android' && (
+            <UsbCameraView 
+              ref={usbCameraRef} 
+              style={[styles.cameraPreview, { position: 'absolute', opacity: isUsbConnected ? 1 : 0, zIndex: isUsbConnected ? 10 : 1 }]} 
             />
           )}
+          
+          <CameraView
+            ref={expoCameraRef}
+            style={[styles.cameraPreview, { position: 'absolute', opacity: isUsbConnected ? 0 : 1, zIndex: isUsbConnected ? 1 : 10 }]}
+            facing="front"
+            pictureSize={pictureSize === 'fallback' ? undefined : pictureSize}
+            onCameraReady={handleCameraReady}
+          />
         </View>
       </View>
 
       {/* Render UI controls/overlays on top */}
       {renderContent()}
-
-      {/* White Flash Overlay */}
-      <Animated.View
-        style={[styles.flashOverlay, flashAnimatedStyle]}
-        pointerEvents="none"
-      />
     </Animated.View>
   );
 }