fix(mini): 修复video页面config使用definePageConfig错误

- 改为直接export default对象，与其他页面保持一致
- 修复运行时definePageConfig is not defined错误

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Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

mini/src/pages/yongren/video/index.config.ts

@@ -1,4 +1,4 @@
-export default definePageConfig({
+export default {
   navigationBarTitleText: '视频管理',
   navigationStyle: 'custom'
-})
+}