feat: enhance admin user detail with campaign, panel data, node usage

- Add campaign card and referrals list to info tab
- Add panel config/links, live traffic, connection info to subscription tab
- Add node usage bars with 7/14/30 day period selector
- Add getPanelInfo/getNodeUsage API methods and types
- Add 18 new i18n keys across 4 languages

src/locales/zh.json

@@ -1554,6 +1554,24 @@
         "lastActivity": "最后活跃",
         "totalSpent": "总消费",
         "purchases": "购买次数",
+        "campaign": "广告活动",
+        "referralsList": "推荐列表",
+        "referralEarnings": "推荐收入",
+        "noReferrals": "暂无推荐",
+        "panelConfig": "面板配置",
+        "trojanPassword": "Trojan 密码",
+        "vlessUuid": "VLESS UUID",
+        "ssPassword": "SS 密码",
+        "subscriptionUrl": "订阅链接",
+        "happLink": "HAPP 链接",
+        "firstConnected": "首次连接",
+        "lastOnline": "最后在线",
+        "lastNode": "最后节点",
+        "liveTraffic": "当前流量",
+        "lifetime": "累计",
+        "nodeUsage": "节点用量",
+        "copied": "已复制",
+        "panelNotFound": "面板中未找到用户",
         "referral": {
           "title": "推荐计划",
           "referrals": "推荐人数",