feat(类型): 更新模型类型定义

- Model 接口新增 displayName 字段
- 添加 modelType 类型（claude | codex）用于区分模型类型

src/hooks/useSettings.ts

@@ -35,6 +35,8 @@ export interface Model {
   name: string;
   displayName: string;
   description: string | null;
+  // 模型类型：claude | codex
+  modelType: 'claude' | 'codex';
   supportsTools: boolean;
   supportsThinking: boolean;
   supportsVision: boolean;

src/types/index.ts

@@ -2,6 +2,7 @@
 export interface Model {
   id: string;
   name: string;
+  displayName: string;
   tag: string;
 }