fix(main.py): restart video on reaching end instead of breaking loop

main.py

@@ -527,7 +527,10 @@ class MediaGrader:
                     and not self.is_seeking
                 ):
                     if not self.advance_frame():
-                        break
+                        # Video reached the end, restart it instead of navigating
+                        self.current_cap.set(cv2.CAP_PROP_POS_FRAMES, 0)
+                        self.current_frame = 0
+                        self.load_current_frame()
 
             if key not in [ord("p")]:
                 self.current_index += 1