refactor(数据库): 移除 code_execution 工具配置

- 从 userSettings 表的 defaultTools 默认值中移除 code_execution
- 从种子数据中移除 code_execution 工具定义
- 调整 web_fetch 工具的排序值

src/drizzle/schema.ts

@@ -67,7 +67,7 @@ export const userSettings = pgTable('user_settings', {
   apiFormat: varchar('api_format', { length: 20 }).default('claude'),
   // 默认设置
   defaultModel: varchar('default_model', { length: 64 }).default('claude-sonnet-4-5-20250929'),
-  defaultTools: jsonb('default_tools').$type<string[]>().default(['web_search', 'code_execution', 'web_fetch']),
+  defaultTools: jsonb('default_tools').$type<string[]>().default(['web_search', 'web_fetch']),
   // AI 行为设置
   systemPrompt: text('system_prompt'), // 系统提示词
   temperature: varchar('temperature', { length: 10 }).default('0.7'), // 温度参数 (0-1)

src/drizzle/seed.ts

@@ -14,7 +14,7 @@ async function seedUserSettings() {
       cchUrl: 'http://localhost:13500',
       cchApiKeyConfigured: false,
       defaultModel: 'claude-sonnet-4-5-20250929',
-      defaultTools: ['web_search', 'code_execution', 'web_fetch'],
+      defaultTools: ['web_search', 'web_fetch'],
       theme: 'light',
       language: 'zh-CN',
       enableThinking: false,
@@ -46,24 +46,6 @@ async function seedTools() {
       isDefault: true,
       sortOrder: 1,
     },
-    {
-      toolId: 'code_execution',
-      name: 'code_execution',
-      displayName: 'Code Execution',
-      description: '执行代码片段并返回结果',
-      icon: 'Terminal',
-      inputSchema: {
-        type: 'object',
-        properties: {
-          code: { type: 'string', description: '要执行的代码' },
-          language: { type: 'string', description: '编程语言' },
-        },
-        required: ['code', 'language'],
-      },
-      isEnabled: true,
-      isDefault: true,
-      sortOrder: 2,
-    },
     {
       toolId: 'web_fetch',
       name: 'web_fetch',
@@ -79,7 +61,7 @@ async function seedTools() {
       },
       isEnabled: true,
       isDefault: true,
-      sortOrder: 3,
+      sortOrder: 2,
     },
   ];