完善支付功能，添加支付宝的准备与创建逻辑

src/lib/api.ts

@@ -15,6 +15,7 @@ type ApiResponse<T = undefined> = {
   data: T
 }
 
+
 type PageRecord<T = unknown> = {
   total: number
   page: number
@@ -22,6 +23,8 @@ type PageRecord<T = unknown> = {
   list: T[]
 }
 
+type ExtractData<T extends (...args: never) => unknown> = Awaited<ReturnType<T>> extends ApiResponse<infer D> ? D : never
+
 // 预定义错误
 const UnauthorizedError = new Error('未授权访问')
 
@@ -31,5 +34,6 @@ export {
   CLIENT_SECRET,
   type ApiResponse,
   type PageRecord,
+  type ExtractData,
   UnauthorizedError,
 }