Fix final 4 resilience edge cases

src/screens/CameraScreen.tsx

@@ -23,7 +23,7 @@ import Animated, {
   FadeIn,
   FadeOut,
   withSequence,
-  Easing,
+  withDelay,
   runOnJS,
 } from 'react-native-reanimated';
 import { FontAwesomeIcon } from '@fortawesome/react-native-fontawesome';
@@ -210,16 +210,8 @@ export default function CameraScreen({
     if (burstTimerRef.current) clearTimeout(burstTimerRef.current);
     if (countdownTimerRef.current) clearTimeout(countdownTimerRef.current);
     if (completionTimerRef.current) clearTimeout(completionTimerRef.current);
-    
-    // Clean up any temp files from a partially completed burst
-    for (const uri of burstUris) {
-      try {
-        await FileSystem.deleteAsync(uri, { idempotent: true });
-      } catch (e) {
-        console.warn('Failed to delete temp file on cancel:', e);
-      }
-    }
-    
+    const urisToDelete = [...burstUris];
+
     setCountdown(countdownDuration);
     setIsCapturing(false);
     setIsBurstWaiting(false);
@@ -228,6 +220,15 @@ export default function CameraScreen({
     setBurstUris([]);
     setShowBurstIndicator('');
     onCancel();
+
+    // Clean up any temp files from a partially completed burst in the background
+    Promise.all(
+      urisToDelete.map(uri =>
+        FileSystem.deleteAsync(uri, { idempotent: true }).catch(e => {
+          console.warn('Failed to delete temp file on cancel:', e);
+        })
+      )
+    );
   };
 
   // 3. Start the countdown on screen load (only when NOT idle)