feat: 全球地图、暗黑模式适配、用户总数修复

frontend/src/plugins/i18n/en.json

@@ -951,7 +951,7 @@
     "recentTickets": "Recent Tickets",
     "recentTicketsDesc": "Recent ticket records",
     "userDistribution": "User Distribution",
-    "userDistributionDesc": "User distribution by province and overseas",
+    "userDistributionDesc": "Global user geographic distribution",
     "recentActivities": "Recent Activities",
     "recentActivitiesDesc": "Your recent operation records",
     "allRecentActivities": "All Recent Activities",
@@ -984,6 +984,8 @@
     "initActivityChartError": "Failed to initialize activity chart",
     "verificationCount": "Verification Count",
     "online": "Online",
+    "offline": "Offline",
+    "total": "Total",
     "userCount": "User Count",
     "noUserData": "No user data",
     "profile": "Profile",