Step F1：前端工程骨架 & 登录鉴权

frontend/src/types/api.ts

@@ -0,0 +1,27 @@
+export interface ApiListResponse<T> {
+  items: T[];
+  total: number;
+}
+
+export interface ApiError {
+  code: string;
+  message: string;
+}
+
+export interface LoginRequest {
+  username: string;
+  password: string;
+}
+
+export interface LoginResponse {
+  access_token: string;
+  token_type: string;
+}
+
+export interface UserInfo {
+  id: string;
+  username: string;
+  role: string;
+}
+
+export type UserMeResponse = UserInfo;