feat: 完善模块引导与学习进度体验

统一引导提示的持久化控制，补充学习进度入口与模块资源，避免用户返回页面时重复触发提示。

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

src/views/film/midterm-shooting/on-site/random.vue

@@ -3,7 +3,7 @@ import { ref } from 'vue'
 import { useRouter } from 'vue-router'
 import { ImgButton } from '@/components/Button'
 import { Video } from '@/components'
-import { getBackgroundImage, getPublicPath, IMAGE_PATHS } from '@/utils'
+import { getPublicPath, IMAGE_PATHS } from '@/utils'
 
 const router = useRouter()
 
@@ -12,7 +12,7 @@ const handleBack = () => {
 }
 
 // 创作随机性视频 URL（暂时用其他视频代替）
-const randomVideoUrl = getPublicPath('video/on-site/dygmk_czsjx_batch.mp4')
+const randomVideoUrl = getPublicPath('video/film/on-site/dygmk_czsjx_batch.mp4')
 
 // 视频播放状态
 const videoPlaying = ref(false)
@@ -20,14 +20,8 @@ const videoPlaying = ref(false)
 
 <template>
   <div class="relative w-full h-full flex items-center justify-center overflow-hidden">
-    <!-- 背景 -->
-    <div
-      class="absolute inset-0 bg-cover bg-center bg-no-repeat -z-10"
-      :style="{ backgroundImage: getBackgroundImage(IMAGE_PATHS.SHOOTING.BG) }"
-    ></div>
-
     <!-- 视频播放区域 -->
-    <div class="w-full h-full bg-black/40 backdrop-blur-md rounded-3xl border border-white/20">
+    <div class="w-full h-full">
       <Video
         class="w-full h-full"
         :src="randomVideoUrl"