feat: 完善视频学习进度缓存

完善新手导航和三大创作模块的视频完成缓存、未完成提示与学习进度计算，确保进度按实际学习资源完成情况更新。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/views/film/midterm-shooting/on-site/slow-shutter-night.vue

@@ -4,18 +4,26 @@ import { useRouter } from 'vue-router'
 import { ImgButton } from '@/components/Button'
 import { Video } from '@/components'
 import { getBackgroundImage, getPublicPath, IMAGE_PATHS } from '@/utils'
+import { useFilmStore } from '@/stores/modules/film'
 
 const router = useRouter()
+const filmStore = useFilmStore()
 
 const handleBack = () => {
   router.back()
 }
 
 // 慢门拍摄夜晚视频 URL（暂时用其他视频代替）
-const slowShutterNightVideoUrl = getPublicPath('video/film/on-site/dygmk_mmps_batch.mp4')
+const slowShutterNightVideoUrl = getPublicPath(
+  'video/film/on-site/dygmk_mmps_batch.mp4',
+)
 
 // 视频播放状态
 const videoPlaying = ref(false)
+
+const handleVideoEnded = () => {
+  filmStore.markViewed('FilmOnsiteSlowShutterNight')
+}
 </script>
 
 <template>
@@ -37,6 +45,7 @@ const videoPlaying = ref(false)
         :controls="true"
         :hideNativeControls="true"
         :autoplay="true"
+        @ended="handleVideoEnded"
       />
     </div>