feat: 添加请求日志中间件以记录请求信息

Co-authored-by: Copilot <copilot@github.com>

server/middleware/log.ts

@@ -0,0 +1,26 @@
+import { consola } from "consola";
+
+/**
+ * 请求日志中间件：记录每次请求的 method、路径、状态码和耗时。
+ * 不记录请求体和响应体，避免密码、token 等敏感信息泄漏。
+ */
+export default defineEventHandler((event) => {
+  const start = Date.now();
+  const method = event.node.req.method ?? "UNKNOWN";
+  const path = getRequestURL(event).pathname;
+
+  // 响应发送完毕后记录结果
+  event.node.res.on("finish", () => {
+    const status = event.node.res.statusCode;
+    const elapsed = Date.now() - start;
+    const log = `[${method}] ${path} → ${status} (${elapsed}ms)`;
+
+    if (status >= 500) {
+      consola.error(log);
+    } else if (status >= 400) {
+      consola.warn(log);
+    } else {
+      consola.info(log);
+    }
+  });
+});