fix(i18n): put dashboard metric keys inside dashboard section

frontend/src/i18n/locales/en.ts

@@ -118,7 +118,7 @@ export default {
   },
   "dashboard": {
     "title": "Dashboard",
-    "subtitle": "System & Core Overview",
+    "subtitle": "Runtime, system monitoring and traffic overview",
     "status": "Core Status",
     "running": "Running",
     "stoppedStatus": "Stopped",
@@ -171,7 +171,15 @@ export default {
     "openSockets": "Open sockets",
     "coreName": "Mihomo",
     "tcp": "TCP",
-    "udp": "UDP"
+    "udp": "UDP",
+    "systemCpu": "System CPU",
+    "systemMemory": "System Memory",
+    "systemDisk": "System Disk",
+    "recentActive": "Active in recent window",
+    "lastUpdated": "Last updated",
+    "autoRefresh": "Auto refresh",
+    "autoRefreshPaused": "Auto refresh paused",
+    "pause": "Pause"
   },
   "listeners": {
     "subtitle": "Create and manage Mihomo inbound listeners.",

frontend/src/i18n/locales/zh-CN.ts

@@ -118,7 +118,7 @@ export default {
   },
   "dashboard": {
     "title": "仪表盘",
-    "subtitle": "系统与核心状态概览",
+    "subtitle": "运行时、系统监控与流量概览",
     "status": "核心状态",
     "running": "运行中",
     "stoppedStatus": "已停止",
@@ -171,7 +171,15 @@ export default {
     "openSockets": "打开连接",
     "coreName": "Mihomo",
     "tcp": "TCP",
-    "udp": "UDP"
+    "udp": "UDP",
+    "systemCpu": "系统 CPU",
+    "systemMemory": "系统内存",
+    "systemDisk": "系统硬盘",
+    "recentActive": "最近窗口活跃",
+    "lastUpdated": "最后更新",
+    "autoRefresh": "自动刷新",
+    "autoRefreshPaused": "自动刷新已暂停",
+    "pause": "暂停"
   },
   "listeners": {
     "subtitle": "创建与管理 Mihomo 入站节点。",