fix: 更新启动页和首页的视频链接及封面

将启动页视频从sample-10s.mp4替换为cover.mp4
更新首页视频为workflow.mp4并添加封面图片

@@ -184,7 +184,7 @@ const router = useRouter()
 useTitle('西园戒幢律寺三坛大戒法会');
 
 // TODO: 视频配置
-const videoUrl = ref('https://cdn.ipadbiz.cn/stdj/video/sample-10s.mp4')
+const videoUrl = ref('https://cdn.ipadbiz.cn/stdj/video/workflow.mp4')
 
 const videoOptions = ref({
   fluid: true,
@@ -192,7 +192,7 @@ const videoOptions = ref({
   aspectRatio: '16:9',
   controls: true,
   preload: 'metadata',
-  poster: '',
+  poster: 'https://cdn.ipadbiz.cn/stdj/video/workflow.jpg',
   playbackRates: [0.5, 1, 1.25, 1.5, 2],
 })
 

@@ -67,7 +67,7 @@ const use_image_bg = ref(false)
 const is_video_ready = ref(false)
 
 // TODO: 视频配置
-const videoUrl = ref('https://cdn.ipadbiz.cn/stdj/video/sample-10s.mp4')
+const videoUrl = ref('https://cdn.ipadbiz.cn/stdj/video/cover.mp4')
 const imgUrl = ref('https://cdn.ipadbiz.cn/stdj/images/%E5%90%AF%E5%8A%A8%E9%A1%B5%E6%B5%B7%E6%8A%A5%E8%83%8C%E6%99%AF@2x.png')
 
 // 进入应用函数