feat: 新增隧道管理功能，前后端完整实现

- 新增统一 ApiResponse 类型定义，与 Rust 端响应结构对齐
- 新增 Rust 后端隧道数据库表、模型、命令和 API 接口
- 新增前端隧道类型定义、API 调用、卡片组件和表单弹窗
- 新增中英双语隧道相关国际化文案
- 更新服务器类型定义，引入共享的 ApiResponse

src/i18n/locales/zh-CN.json

@@ -88,6 +88,80 @@
       "portRange": "端口号必须在 1 - 65535 之间"
     }
   },
+  "tunnel": {
+    "refresh": "刷新",
+    "add": "新增隧道",
+    "empty": "暂无隧道，点击右上角新增",
+    "edit": "编辑",
+    "delete": "删除",
+    "deleteConfirm": "确定要删除隧道「{name}」吗？",
+    "name": "名称",
+    "namePlaceholder": "请输入隧道名称",
+    "type": "代理类型",
+    "localIp": "本地 IP",
+    "localIpPlaceholder": "如 127.0.0.1",
+    "localPort": "本地端口",
+    "remotePort": "远程端口",
+    "remotePortTip": "tcp / udp 类型必填",
+    "pinned": "置顶",
+    "enabled": "启用",
+    "enabledTip": "可同时启用多个隧道",
+    "remark": "备注",
+    "remarkPlaceholder": "可选备注信息",
+    "sort": "排序",
+    "saveSuccess": "保存成功",
+    "deleteSuccess": "删除成功",
+    "advanced": "高级设置",
+    "customDomains": "自定义域名",
+    "customDomainsPlaceholder": "输入域名后回车，可添加多个",
+    "subdomain": "子域名",
+    "subdomainPlaceholder": "如 test",
+    "locations": "URL 前缀",
+    "locationsPlaceholder": "输入 URL 前缀后回车，可添加多个",
+    "secretKey": "密钥",
+    "secretKeyPlaceholder": "stcp / xtcp / sudp 所需密钥",
+    "useEncryption": "启用加密",
+    "useCompression": "启用压缩",
+    "bandwidthLimit": "带宽限制",
+    "bandwidthLimitPlaceholder": "如 1MB / 1KB",
+    "proxyProtocolVersion": "Proxy Protocol 版本",
+    "proxyProtocolVersionDefault": "不启用",
+    "healthCheck": "健康检查",
+    "healthCheckType": "检查类型",
+    "healthCheckTypeDefault": "不启用",
+    "healthCheckTimeout": "超时（秒）",
+    "healthCheckMaxFailed": "最大失败次数",
+    "healthCheckInterval": "检查间隔（秒）",
+    "healthCheckPath": "检查路径",
+    "healthCheckPathPlaceholder": "如 /healthz",
+    "loadBalancer": "负载均衡",
+    "loadBalancerGroup": "负载均衡组",
+    "loadBalancerGroupPlaceholder": "同一组内的代理会做负载均衡",
+    "loadBalancerGroupKey": "组密钥",
+    "local": "本地",
+    "remote": "远程",
+    "types": {
+      "tcp": "TCP",
+      "udp": "UDP",
+      "http": "HTTP",
+      "https": "HTTPS",
+      "stcp": "STCP（安全 TCP）",
+      "xtcp": "XTCP（点对点）",
+      "sudp": "SUDP（安全 UDP）",
+      "tcpmux": "TCPMUX"
+    },
+    "form": {
+      "addTitle": "新增隧道",
+      "editTitle": "编辑隧道",
+      "nameRequired": "请输入隧道名称",
+      "typeRequired": "请选择代理类型",
+      "localIpRequired": "请输入本地 IP",
+      "localIpInvalid": "请输入合法的 IP 地址或域名",
+      "localPortRequired": "请输入本地端口",
+      "remotePortRequired": "请输入远程端口",
+      "portRange": "端口号必须在 1 - 65535 之间"
+    }
+  },
   "common": {
     "developing": "功能开发中，敬请期待",
     "confirm": "确定",