feat: Add new model management features

- Implement `/api/channel/models_enabled` endpoint to retrieve enabled models
- Add `EnabledListModels` handler in controller
- Create new `ModelRatioNotSetEditor` component for managing unset model ratios
- Update router to include new models_enabled route
- Add internationalization support for new model management UI
- Include GPT-4.5 preview model in OpenAI model list

web/src/components/OperationSetting.js

@@ -16,6 +16,7 @@ import ModelRatioSettings from '../pages/Setting/Operation/ModelRatioSettings.js
 import { API, showError, showSuccess } from '../helpers';
 import SettingsChats from '../pages/Setting/Operation/SettingsChats.js';
 import { useTranslation } from 'react-i18next';
+import ModelRatioNotSetEditor from '../pages/Setting/Operation/ModelRationNotSetEditor.js';
 
 const OperationSetting = () => {
   const { t } = useTranslation();
@@ -158,6 +159,9 @@ const OperationSetting = () => {
             <Tabs.TabPane tab={t('可视化倍率设置')} itemKey="visual">
               <ModelSettingsVisualEditor options={inputs} refresh={onRefresh} />
             </Tabs.TabPane>
+            <Tabs.TabPane tab={t('未设置倍率模型')} itemKey="unset_models">
+              <ModelRatioNotSetEditor options={inputs} refresh={onRefresh} />
+            </Tabs.TabPane>
           </Tabs>
         </Card>
       </Spin>