feat: 新增api接口

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

server/api/auth/logout.get.ts

@@ -0,0 +1,21 @@
+// server/api/auth/logout.get.ts
+import type { UserLogoutResult } from "#shared/types";
+
+/**
+ * GET /api/auth/logout
+ *
+ * 登出流程：
+ *  1. 服务端直接转发 GET 请求到上游 NewAPI
+ *  2. 上游成功后统一返回 { code: 0, data: null, msg: "登出成功" }
+ */
+export default defineEventHandler(async () => {
+  try {
+    await newApiFetch<UserLogoutResult>("/api/user/logout", {
+      method: "GET"
+    });
+
+    return createSuccessResponse(null, "登出成功");
+  } catch (error) {
+    return createUpstreamErrorResponse(error, "登出失败");
+  }
+});