UI refactor: Admin Screen redesign, Timers, Flash timing, Date overlay

src/screens/CameraScreen.tsx

@@ -111,10 +111,11 @@ export default function CameraScreen({
 
   useEffect(() => {
     if (countdown !== null) {
-      scale.value = 0.5;
-      scale.value = withSpring(1.25, { damping: 10, stiffness: 120 }, () => {
-        scale.value = withTiming(1.0, { duration: 150 });
-      });
+      scale.value = 1;
+      scale.value = withSequence(
+        withTiming(1.5, { duration: 100 }),
+        withSpring(1, { damping: 10, stiffness: 100 })
+      );
     }
   }, [countdown]);
 
@@ -133,7 +134,7 @@ export default function CameraScreen({
 
   // Turn off white flash effect
   const turnFlashOff = useCallback(() => {
-    flashOpacity.value = withTiming(0, { duration: 400 });
+    flashOpacity.value = withTiming(0, { duration: 800 });
   }, []);
 
   // 1. Request built-in camera permission on mount (just in case we fallback)
@@ -319,7 +320,7 @@ export default function CameraScreen({
       turnFlashOn();
       
       // Wait for UI to render the flash before blocking main thread with capture
-      await new Promise(resolve => setTimeout(resolve, 50));
+      await new Promise(resolve => setTimeout(resolve, 150));
 
       let capturedUri: string;