i18n(sidebar): unify zh-Hans cloud edition label to 云端版

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/i18n/locales/zh-Hans.ts

@@ -11,7 +11,7 @@ const zhHans = {
     quickStart: '快速开始向导',
     scrollToBottom: '滚动到底部',
     editionCommunity: '社区版',
-    editionCloud: '云版',
+    editionCloud: '云端版',
   },
   common: {
     login: '登录',