feat: 完善平台总后台模块

frontend/platform_admin/src/api/http.ts

@@ -0,0 +1,21 @@
+/** 平台总后台的共享 HTTP 客户端，统一处理响应体和 JWT 请求头。 */
+const apiBaseURL = import.meta.env.VITE_API_BASE_URL || 'http://localhost:12426/heqi/platform/v1';
+
+export const tokenStorageKey = 'token';
+
+export type PageResult<T> = { total: number; list: T[] };
+
+export async function request<T>(path: string, init?: RequestInit): Promise<T> {
+  const token = localStorage.getItem(tokenStorageKey);
+  const response = await fetch(`${apiBaseURL}${path}`, {
+    ...init,
+    headers: {
+      'Content-Type': 'application/json',
+      ...(token ? { Authorization: token } : {}),
+      ...(init?.headers ?? {}),
+    },
+  });
+  const payload = (await response.json()) as { code?: number; message?: string; details?: T };
+  if (!response.ok || payload.code !== 0) throw new Error(payload.message || '请求失败');
+  return payload.details as T;
+}