refactor: 更新品牌信息为巨丰钢铁并优化相关配置

更新公司品牌信息从"福安德外贸"到"巨丰钢铁"，包括：
1. 修改所有相关文档中的公司名称和描述
2. 更新网站配置和邮件模板
3. 移除不必要的分析工具和社交媒体链接
4. 优化i18n多语言配置
5. 调整next.config.mjs输出模式为standalone
6. 更新favicon和logo图片
7. 清理未使用的代码和文件

i18n/messages/en.json

@@ -125,42 +125,8 @@
               "useA": true
             }
           ]
-        },
-        {
-          "title": "Other Products",
-          "links": [
-            {
-              "href": "https://nexty.dev/",
-              "name": "Nexty - SaaS Template",
-              "rel": "noopener noreferrer",
-              "target": "_blank"
-            },
-            {
-              "href": "https://ogimage.click/",
-              "name": "OG Image Generator",
-              "rel": "noopener noreferrer",
-              "target": "_blank"
-            },
-            {
-              "href": "https://dofollow.tools/",
-              "name": "Dofollow.Tools",
-              "rel": "noopener noreferrer",
-              "target": "_blank"
-            }
-          ]
         }
       ]
-    },
-    "Newsletter": {
-      "title": "Subscribe to Our Newsletter",
-      "description": "Get the latest Next.js news and tutorials",
-      "defaultErrorMessage": "Please enter a valid email address",
-      "successMessage": "Subscription successful",
-      "errorMessage": "Subscription failed",
-      "errorMessage2": "Subscription failed, please try again later",
-      "subscribe": "Subscribe",
-      "subscribing": "Subscribing",
-      "subscribed": "Subscribed successfully! Thank you for your attention."
     }
   },
   "Home": {