Update app.py

app.py

@@ -448,20 +448,20 @@ Generate cinematic Quran video automatically.
         label="Result"
     )
 
-preview_btn.click(
-    fn=preview_layout,
-    inputs=[
-        images,
-        background_video,
-        timing_json,
-        arabic_font,
-        arabic_y,
-        translation_gap,
-        arabic_font_size,
-        translation_font_size
-    ],
-    outputs=preview_image
-)
+    preview_btn.click(
+        fn=preview_layout,
+        inputs=[
+            images,
+            background_video,
+            timing_json,
+            arabic_font,
+            arabic_y,
+            translation_gap,
+            arabic_font_size,
+            translation_font_size
+        ],
+        outputs=preview_image
+    )
 
     generate_btn.click(
         fn=process,