修改后端登陆响应为json，修复登陆页面

gateway/src/main.cpp

@@ -359,9 +359,13 @@ http::response<http::string_body> handleLogin(
 		std::string token = Base64::base64_encode(data);
 		std::string sign = _PRIV.Sign(data);
 
+		json::value jv_rr = {
+			{"success", true},
+			{"data", json::object{{"token", token + "_" + sign}}}	// 双大括号
+		};
 		res.set("Connection", "close");
 		res.result(http::status::ok);
-		res.body() = token + "_" + sign;
+		res.body() = json::serialize(jv_rr);
 	}
 
 	catch (const HttpException& e) {

static/public/js/login.js

@@ -146,16 +146,14 @@ form.addEventListener('submit', async function(e) {
 			throw new Error(result.message || `登录失败（HTTP ${res.status}）`);
 		}
 
-        if (result.code === 0) {
-			if (!result.data || !result.data.token || !result.data.username) {
-				throw new Error('登录成功，但服务器返回的数据不完整');
-			}
-			alert(`${result.message}，账号：${result.data.username}`);
+		if (result.success) {
+			alert(`登陆成功`);
 			sessionStorage.setItem('token', result.data.token);
 			location.href = 'main.html';
 		} else {
 			alert(result.message || '登录失败');
 		}
+
 	} catch (err) {
 		alert(err.message || '接口请求失败，请检查后端服务是否启动');
 		console.error('登录请求异常：', err);