fix: idle timer restart on save

src/screens/PreviewScreen.tsx

@@ -330,6 +330,7 @@ export default function PreviewScreen({
       setTimeout(() => {
         if (!mountedRef.current) return;
         setIsProcessing(false);
+        resetIdleTimer();
       }, 1500);
     } catch (error: any) {
       if (!mountedRef.current) return;
@@ -341,9 +342,16 @@ export default function PreviewScreen({
 
   const handleExitRef = useRef<(() => void) | null>(null);
   handleExitRef.current = async () => {
+    logger.log('Idle timer triggered or BEENDEN clicked. Exiting PreviewScreen...');
     if (idleTimerRef.current) clearTimeout(idleTimerRef.current);
-    if (!mountedRef.current) return;
-    if (isProcessing) return;
+    if (!mountedRef.current) {
+      logger.log('PreviewScreen already unmounted, aborting exit.');
+      return;
+    }
+    if (isProcessing) {
+      logger.log('Currently processing, aborting auto-exit.');
+      return;
+    }
     const state = stateRef.current;
     if (state.stickers.length === 0 && state.layout === 'single' && !state.activeFrame && state.dateOverlay === 'off') {
       state.onReset();