fix(web): 系统设置 CRUD 修复 — version 乐观锁 + 语言字段映射 + JSON 显示

- API 层所有 Info/Request 接口添加 version 字段，update 函数传递 version
- delete 函数改为 client.delete(url, { data: { version } }) 发送 JSON body
- LanguageInfo.enabled → is_active，匹配后端 LanguageResp 字段名
- LanguageManager 编辑弹窗简化为只读详情（后端仅支持 is_active 切换）
- SystemSettings 设置值显示改用 JSON.stringify 而非 String()
- SystemSettings updateSetting 发送解析后的 JSON 对象而非字符串

apps/web/src/api/settings.ts

@@ -6,6 +6,7 @@ export interface SettingInfo {
   scope_id?: string;
   setting_key: string;
   setting_value: unknown;
+  version: number;
 }
 
 export async function getSetting(key: string, scope?: string, scopeId?: string) {
@@ -16,14 +17,14 @@ export async function getSetting(key: string, scope?: string, scopeId?: string)
   return data.data;
 }
 
-export async function updateSetting(key: string, settingValue: unknown) {
+export async function updateSetting(key: string, settingValue: unknown, version?: number) {
   const { data } = await client.put<{ success: boolean; data: SettingInfo }>(
     `/config/settings/${key}`,
-    { setting_value: settingValue },
+    { setting_value: settingValue, version },
   );
   return data.data;
 }
 
-export async function deleteSetting(key: string) {
-  await client.delete(`/config/settings/${encodeURIComponent(key)}`);
+export async function deleteSetting(key: string, version: number) {
+  await client.delete(`/config/settings/${encodeURIComponent(key)}`, { data: { version } });
 }