chore: 初始化仓库

中华文明全图鉴——文物全图系统（PC Web 地图 + NestJS API + 管理后台）。
含三大 IP（文物南迁北归 / 国宝海外回归 / 博物馆手艺人）、AI 文物对话、
文物地图与详情、以及 demo-video-kit 演示视频生成工具。

apps/admin/src/api/client.ts

@@ -0,0 +1,31 @@
+const BASE_URL = import.meta.env.VITE_API_URL ?? "http://localhost:3002";
+
+function getToken() {
+  return localStorage.getItem("access_token");
+}
+
+async function request<T>(path: string, options: RequestInit = {}): Promise<T> {
+  const token = getToken();
+  const res = await fetch(`${BASE_URL}${path}`, {
+    ...options,
+    headers: {
+      "Content-Type": "application/json",
+      ...(token ? { Authorization: `Bearer ${token}` } : {}),
+      ...(options.headers ?? {}),
+    },
+  });
+  if (!res.ok) {
+    const err = await res.json().catch(() => ({}));
+    throw new Error((err as { message?: string }).message ?? `HTTP ${res.status}`);
+  }
+  return res.json() as Promise<T>;
+}
+
+export const api = {
+  get: <T>(path: string) => request<T>(path),
+  post: <T>(path: string, body: unknown) =>
+    request<T>(path, { method: "POST", body: JSON.stringify(body) }),
+  patch: <T>(path: string, body: unknown) =>
+    request<T>(path, { method: "PATCH", body: JSON.stringify(body) }),
+  delete: <T>(path: string) => request<T>(path, { method: "DELETE" }),
+};