feat(ui): improve client form modal UX

- Rename tabs: "Basic" → "Basics", "Config" → "Credentials"
- Move reverseTag field from Credentials tab to Basics tab
- Move IP log button inline with limitIp field (tooltip button, edit mode only)
- Hide random email button when editing an existing client
- Add tooltips to totalGB and limitIp fields with descriptive hints
- Rename labels: "Total Sent/Received (GB)" → "Traffic Limit (GB)", "Duration" → "Duration (days)"
- Add renewDays translation key for auto-renew label with unit hint
- Remove redundant filterOption and width style from AutoComplete group selectors
- Update all 15 locale files with new and renamed translation keys

internal/web/translation/zh-CN.json

@@ -637,8 +637,8 @@
       }
     },
     "clients": {
-      "tabBasic": "基本",
-      "tabConfig": "配置",
+      "tabBasics": "基本",
+      "tabCredentials": "凭据",
       "add": "添加客户端",
       "edit": "编辑客户端",
       "submitAdd": "添加客户端",
@@ -666,10 +666,11 @@
       "prefix": "前缀",
       "postfix": "后缀",
       "delayedStart": "首次使用后开始",
-      "expireDays": "时长",
+      "expireDays": "时长 (天)",
       "days": "天",
       "renew": "自动续期",
       "renewDesc": "到期后自动续期。(0 = 禁用) (单位: 天)",
+      "renewDays": "自动续期 (天)",
       "searchPlaceholder": "搜索邮箱、备注、sub ID、UUID、密码、auth…",
       "filterTitle": "筛选客户端",
       "clearAllFilters": "清除全部",
@@ -691,10 +692,12 @@
       "hasNot": "不拥有",
       "title": "客户端",
       "actions": "操作",
-      "totalGB": "总上传/下载 (GB)",
+      "totalGB": "流量上限 (GB)",
+      "totalGBDesc": "该客户端的流量配额。0 = 不限制。",
       "expiryTime": "过期时间",
       "addClients": "添加客户端",
       "limitIp": "IP 限制",
+      "limitIpDesc": "最大同时连接 IP 数。0 = 不限制。",
       "password": "密码",
       "subId": "订阅 ID",
       "online": "在线",
@@ -1733,4 +1736,4 @@
       "chooseInbound": "选择一个入站"
     }
   }
-}
+}