修复下载按钮失效game

app/index/view/game/detail.php

@@ -202,12 +202,19 @@
                             'X-Requested-With': 'XMLHttpRequest'
                         }
                     })
-                    .then(response => response.json())
+                    .then(response => {
+                        if (!response.ok) {
+                            throw new Error('网络响应失败');
+                        }
+                        return response.json();
+                    })
                     .then(data => {
                         if (data.code === 1) {
                             const downloadsElement = document.getElementById('gameDownloads');
+                            if (downloadsElement) {
                                 let downloads = parseInt(downloadsElement.textContent);
                                 downloadsElement.textContent = downloads + 1;
+                            }
 
                             // 直接使用返回的URL
                             if (data.data && data.data.url) {