feat: 补全模型能力选项(11种) + 按能力指定默认模型 + Auto自动模式

frontend/src/api/index.ts

@@ -315,6 +315,11 @@ export const adminAPI = {
   updateAdminModel: (id: string, data: any) => put<any>(`/admin/models/${id}`, data),
   deleteAdminModel: (id: string) => del<any>(`/admin/models/${id}`),
   getModelStats: () => get<any>('/admin/models/stats'),
+  // 能力类型 & 按能力默认模型
+  getCapabilities: () => get<any[]>('/admin/models/capabilities'),
+  getCapabilityDefaults: () => get<any>('/admin/models/capability-defaults'),
+  setCapabilityDefault: (capability: string, modelId: string | null) =>
+    put<any>('/admin/models/capability-defaults', { capability, model_id: modelId }),
   // 网站设置
   getSiteSettings: () => get<any>('/admin/settings/site'),
   updateSiteSettings: (data: any) => put<any>('/admin/settings/site', data),