🌐 feat(i18n): add English translation for "暴露倍率接口"

- Add translation "Expose ratio API" for Chinese text "暴露倍率接口"
- Update English locale file (en.json) with new translation entry

web/src/i18n/locales/en.json

@@ -1688,5 +1688,6 @@
   "暂无差异化倍率显示": "No differential ratio display",
   "请先选择同步渠道": "Please select the synchronization channel first",
   "与本地相同": "Same as local",
-  "未找到匹配的模型": "No matching model found"
+  "未找到匹配的模型": "No matching model found",
+  "暴露倍率接口": "Expose ratio API"
 }