feat(proxy): add proxy IP management and account routing

Add admin CRUD and connectivity checks for SOCKS5/SOCKS5H proxy nodes.

Allow accounts to bind to a proxy, route DeepSeek requests through the selected node, and expose proxy management in the admin UI.

webui/src/locales/zh.json

@@ -9,6 +9,10 @@
             "label": "账号管理",
             "desc": "管理 DeepSeek 账号池"
         },
+        "proxies": {
+            "label": "代理 IP",
+            "desc": "管理账号可用的代理出口"
+        },
         "test": {
             "label": "API 测试",
             "desc": "测试 API 连接与响应"
@@ -140,12 +144,55 @@
         "deleteAllSessions": "删除所有会话",
         "deleteAllSessionsConfirm": "确定要删除该账号的所有会话吗？此操作不可恢复。",
         "deleteAllSessionsSuccess": "删除成功",
+        "accountProxyLabel": "账号代理",
+        "proxyNone": "不走代理",
+        "proxyBadge": "代理: {name}",
+        "proxyUpdateSuccess": "账号代理已更新",
         "envModeRiskTitle": "当前为环境变量配置模式（有持久化风险）",
         "envModeRiskDesc": "检测到 DS2API_CONFIG_JSON。若未开启 DS2API_ENV_WRITEBACK，管理台改动仅在内存生效，重启可能丢失。",
         "envModeWritebackPendingTitle": "环境变量模式 + 自动持久化已开启（等待落盘）",
         "envModeWritebackActiveTitle": "环境变量模式 + 自动持久化已生效",
         "envModeWritebackDesc": "程序会自动创建/写入配置文件并在后续切换为文件模式。当前持久化路径：{path}"
     },
+    "proxyManager": {
+        "title": "代理 IP",
+        "desc": "维护账号可选的 SOCKS 代理节点，并测试到 DeepSeek 的出站连通性。",
+        "addProxy": "添加代理",
+        "editProxy": "编辑代理",
+        "deleteProxy": "删除代理",
+        "modalAddTitle": "添加代理节点",
+        "modalEditTitle": "编辑代理节点",
+        "modalDesc": "支持 socks5 与 socks5h，账号侧会按绑定结果选择出口。",
+        "nameLabel": "代理名称",
+        "namePlaceholder": "例如：香港出口 A",
+        "typeLabel": "代理类型",
+        "hostLabel": "代理主机",
+        "hostPlaceholder": "127.0.0.1 或代理域名",
+        "portLabel": "端口",
+        "usernameLabel": "用户名（可选）",
+        "usernamePlaceholder": "代理认证用户名",
+        "passwordLabel": "密码（可选）",
+        "passwordPlaceholder": "代理认证密码",
+        "passwordKeepHint": "留空表示保留当前已保存的密码。",
+        "typeHelp": "socks5 会先在本地解析目标域名，再交给代理拨号；socks5h 会把域名直接交给代理远端解析。",
+        "requiredFields": "至少需要填写主机和端口。",
+        "saving": "保存中...",
+        "testing": "测试中",
+        "testAction": "检查代理",
+        "untested": "未测试",
+        "saveAdd": "添加代理",
+        "saveEdit": "保存修改",
+        "addSuccess": "代理添加成功",
+        "updateSuccess": "代理更新成功",
+        "deleteConfirm": "确定要删除代理 {name} 吗？绑定到该代理的账号会自动切回直连。",
+        "noProxies": "还没有任何代理节点。",
+        "authEnabled": "已启用认证",
+        "testSuccessShort": "已连通 {time}ms",
+        "testFailedShort": "测试失败",
+        "totalProxies": "代理总数",
+        "socks5hCount": "socks5h 节点",
+        "authProxyCount": "带认证节点"
+    },
     "apiTester": {
         "defaultMessage": "你好，请用一句话介绍你自己。",
         "models": {
@@ -325,4 +372,4 @@
             "four": "触发重新部署以应用新的环境变量。"
         }
     }
-}
+}