Initial MVP for QA asset backend

hy_qa_asset_backend/frontend/lib/api.ts

@@ -0,0 +1,40 @@
+export const API_BASE = process.env.NEXT_PUBLIC_API_BASE_URL ?? "http://127.0.0.1:8000/api";
+
+async function request<T>(path: string, init?: RequestInit): Promise<T> {
+  const response = await fetch(`${API_BASE}${path}`, {
+    ...init,
+    cache: "no-store",
+    headers: {
+      "Content-Type": "application/json",
+      ...(init?.headers ?? {})
+    }
+  });
+  if (!response.ok) {
+    let message = `${response.status} ${response.statusText}`;
+    try {
+      const body = await response.json();
+      message = body.detail ?? message;
+    } catch {
+      // keep response status as message
+    }
+    throw new Error(message);
+  }
+  return response.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) })
+};
+
+export function formatDateTime(value: string | null | undefined) {
+  if (!value) return "-";
+  return new Intl.DateTimeFormat("zh-CN", {
+    dateStyle: "short",
+    timeStyle: "short"
+  }).format(new Date(value));
+}
+