修复：详情页跳转链接，使用解码后的base64-url作为externalLink

Author: CC11001100

docs/challenges/阿里滑块.yml

@@ -59,7 +59,7 @@ challenges:
     # description-markdown-path_en: contents/example/description_en.md
 
     # 挑战目标网站URL的base64编码
-    base64-url: aHR0cHM6Ly93d3cuYWxpeXVuLmNvbS9wcm9kdWN0L2FmcC8=
+    base64-url: aHR0cHM6Ly9kbHAuZ2hzLmNuL3Ivdz9jbWQ9Y29tLnF3aW5ncy5hcHBzLmdocy5nd2Ntcy5zZWFyY2gmdHlwZT0x
 
     # 链接有效性状态（布尔值）
     # 标记挑战链接是否失效，true表示已失效
@@ -86,4 +86,4 @@ challenges:
     # 最后更新时间（ISO 8601格式）
     # 记录挑战最后修改时间，格式与create-time相同
     # 当任何字段变更时需同步更新此时间
-    update-time: 2025-04-12 10:00:00
+    update-time: 2025-04-13 10:36:24 

src/plugins/VirtualFileSystemPlugin.ts

@@ -416,7 +416,7 @@ function processChallengeData(challenge: any, rootDir: string, isBuild: boolean,
         'create-time': challenge['create-time'] || new Date().toISOString(),
         'update-time': challenge['update-time'] || new Date().toISOString(),
         'base64-url': challenge['base64-url'] || '',
-        externalLink: challenge['external-link'] || '',
+        externalLink: challenge['base64-url'] ? atob(challenge['base64-url']) : challenge['external-link'] || '',
         platform: challenge.platform || 'Web',
         'is-expired': challenge['is-expired'] || false,
         ignored: challenge.ignored || false, // 添加ignored属性