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/practice/index.vue

@@ -81,6 +81,17 @@ const worksList = ref<WorkItem[]>([
   },
 ])
 
+const getCachedWorkScore = (work: WorkItem): number => {
+  const scores = filmStore.practiceWorkRatings[work.path]
+  const values = scores ? Object.values(scores) : []
+
+  if (values.length === 0) return work.stars
+
+  return Math.round(
+    values.reduce((total, score) => total + score, 0) / values.length,
+  )
+}
+
 /** 左滑动作品列表 */
 const scrollWorksLeft = (): void => {
   if (worksScrollIndex.value > 0) {
@@ -306,7 +317,7 @@ onUnmounted(() => {
                 </h3>
                 <!-- 星星评分 -->
                 <StarRating
-                  :score="work.stars"
+                  :score="getCachedWorkScore(work)"
                   size="lg"
                   readonly
                 />