feat: 优化移动端学习与证书体验

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/views/film/after-editing/editing/cut.vue

@@ -37,6 +37,7 @@ const handleVideoEnded = () => {
       :controls="true"
       :hideNativeControls="true"
       :autoplay="true"
+      :seekable="film.editingVideosWatched['cut'] === true"
       :show-center-play-icon="true"
       @ended="handleVideoEnded"
     />