feat: merge admin routes into unified frontend

frontend-web/src/app/admin/(secure)/callback-logs/page.tsx

@@ -0,0 +1,44 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+
+import { StatusBadge } from "@/components/status-badge";
+import { api } from "@/lib/api";
+
+type CallbackLog = {
+  id: number;
+  sourceType: string;
+  sourceCode: string;
+  relatedNo: string;
+  verifyStatus: string;
+  processStatus: string;
+  errorMessage: string;
+};
+
+export default function CallbackLogsPage() {
+  const query = useQuery({
+    queryKey: ["callback-logs"],
+    queryFn: () => api.get<CallbackLog[]>("/api/v1/admin/callback-logs"),
+  });
+
+  return (
+    <section className="panel">
+      <h3>回调日志</h3>
+      <div className="list-grid">
+        {query.data?.map((item) => (
+          <div className="list-item" key={item.id}>
+            <div className="toolbar">
+              <strong>{item.sourceType} / {item.sourceCode}</strong>
+              <StatusBadge value={item.processStatus} />
+            </div>
+            <div className="muted">
+              关联号：{item.relatedNo || "-"} · 验签：{item.verifyStatus}
+            </div>
+            {item.errorMessage ? <div className="muted">错误：{item.errorMessage}</div> : null}
+          </div>
+        ))}
+      </div>
+    </section>
+  );
+}
+