fix: 禁止管理员通过 UpdateUser 禁用自己的账号

KickUserClient 原先先踢线再禁用账号，客户端在两步之间自动重连时
status 仍为 1 可成功认证。调换顺序为先禁用+作废会话再踢线，确保
重连时认证已被拦截。

frontend/package-lock.json

@@ -8,8 +8,10 @@
       "name": "frontend",
       "version": "0.0.0",
       "dependencies": {
+        "chart.js": "^4.5.1",
         "pinia": "^3.0.4",
         "vue": "^3.5.38",
+        "vue-chartjs": "^5.3.4",
         "vue-i18n": "^11.4.6",
         "vue-router": "^5.1.0"
       },
@@ -625,6 +627,12 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@kurkle/color": {
+      "version": "0.3.4",
+      "resolved": "https://registry.npmjs.org/@kurkle/color/-/color-0.3.4.tgz",
+      "integrity": "sha512-M5UknZPHRu3DEDWoipU6sE8PdkZ6Z/S+v4dD+Ke8IaNlpdSQah50lz1KtcFBa2vsdOnwbbnxJwVM4wty6udA5w==",
+      "license": "MIT"
+    },
     "node_modules/@napi-rs/wasm-runtime": {
       "version": "1.1.6",
       "resolved": "https://registry.npmjs.org/@napi-rs/wasm-runtime/-/wasm-runtime-1.1.6.tgz",
@@ -1734,6 +1742,18 @@
       ],
       "license": "CC-BY-4.0"
     },
+    "node_modules/chart.js": {
+      "version": "4.5.1",
+      "resolved": "https://registry.npmjs.org/chart.js/-/chart.js-4.5.1.tgz",
+      "integrity": "sha512-GIjfiT9dbmHRiYi6Nl2yFCq7kkwdkp1W/lp2J99rX0yo9tgJGn3lKQATztIjb5tVtevcBtIdICNWqlq5+E8/Pw==",
+      "license": "MIT",
+      "dependencies": {
+        "@kurkle/color": "^0.3.0"
+      },
+      "engines": {
+        "pnpm": ">=8"
+      }
+    },
     "node_modules/chokidar": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-5.0.0.tgz",
@@ -3405,6 +3425,16 @@
         }
       }
     },
+    "node_modules/vue-chartjs": {
+      "version": "5.3.4",
+      "resolved": "https://registry.npmjs.org/vue-chartjs/-/vue-chartjs-5.3.4.tgz",
+      "integrity": "sha512-x3Fqob8RQvrTdssfi9ecsCzEkFOd8JPmNwSkSQzdfKj/uBsRJs/Y88cZcZIEcPsTVfMGwMo4MOoihoDG2DoE/g==",
+      "license": "MIT",
+      "peerDependencies": {
+        "chart.js": "^4.1.1",
+        "vue": "^3.0.0-0 || ^2.7.0"
+      }
+    },
     "node_modules/vue-i18n": {
       "version": "11.4.6",
       "resolved": "https://registry.npmjs.org/vue-i18n/-/vue-i18n-11.4.6.tgz",

frontend/package.json

@@ -11,8 +11,10 @@
     "type-check": "vue-tsc --build"
   },
   "dependencies": {
+    "chart.js": "^4.5.1",
     "pinia": "^3.0.4",
     "vue": "^3.5.38",
+    "vue-chartjs": "^5.3.4",
     "vue-i18n": "^11.4.6",
     "vue-router": "^5.1.0"
   },

frontend/src/components/TrafficChart.vue

@@ -0,0 +1,87 @@
+<script setup lang="ts">
+import { computed } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { Bar } from 'vue-chartjs'
+import {
+  Chart as ChartJS,
+  CategoryScale,
+  LinearScale,
+  BarElement,
+  Title,
+  Tooltip,
+  Legend,
+} from 'chart.js'
+
+ChartJS.register(CategoryScale, LinearScale, BarElement, Title, Tooltip, Legend)
+
+const { t } = useI18n()
+
+interface TrafficRecord {
+  date: string
+  rx_bytes: number
+  tx_bytes: number
+}
+
+const props = defineProps<{
+  records: TrafficRecord[]
+}>()
+
+function formatBytes(bytes: number): string {
+  if (bytes === 0) return '0 B'
+  const units = ['B', 'KB', 'MB', 'GB', 'TB']
+  const i = Math.floor(Math.log(bytes) / Math.log(1024))
+  return (bytes / Math.pow(1024, i)).toFixed(i > 0 ? 1 : 0) + ' ' + units[i]
+}
+
+const chartData = computed(() => ({
+  labels: props.records.map(r => r.date.slice(5)),
+  datasets: [
+    {
+      label: t('traffic.upload'),
+      data: props.records.map(r => r.rx_bytes),
+      backgroundColor: 'rgba(14, 165, 233, 0.6)',
+      borderColor: 'rgba(14, 165, 233, 1)',
+      borderWidth: 1,
+    },
+    {
+      label: t('traffic.download'),
+      data: props.records.map(r => r.tx_bytes),
+      backgroundColor: 'rgba(34, 197, 94, 0.6)',
+      borderColor: 'rgba(34, 197, 94, 1)',
+      borderWidth: 1,
+    },
+  ],
+}))
+
+const chartOptions = {
+  responsive: true,
+  maintainAspectRatio: false,
+  plugins: {
+    legend: {
+      position: 'top' as const,
+    },
+    tooltip: {
+      callbacks: {
+        label: (context: any) => {
+          const label = context.dataset.label || ''
+          return `${label}: ${formatBytes(context.parsed.y)}`
+        },
+      },
+    },
+  },
+  scales: {
+    y: {
+      beginAtZero: true,
+      ticks: {
+        callback: (value: any) => formatBytes(Number(value)),
+      },
+    },
+  },
+}
+</script>
+
+<template>
+  <div class="h-64">
+    <Bar :data="chartData" :options="chartOptions" />
+  </div>
+</template>

frontend/src/locales/en.ts

@@ -95,6 +95,18 @@ export default {
       'Are you sure you want to delete user {username}? This action cannot be undone.',
     confirmDeleteButton: 'Confirm Delete',
   },
+  traffic: {
+    myTraffic: 'My Traffic',
+    userTrafficToday: "User Traffic Today",
+    todayTraffic: "Today's Traffic",
+    upload: 'Upload',
+    download: 'Download',
+    total: 'Total',
+    history: 'Traffic History',
+    date: 'Date',
+    noTrafficData: 'No traffic data',
+    trafficHistory7d: 'Traffic - Last 7 Days',
+  },
   vpn: {
     title: 'VPN Management',
     refresh: 'Refresh',

frontend/src/locales/zh.ts

@@ -94,6 +94,18 @@ export default {
     confirmDeleteMessage: '确定要删除用户 {username} 吗？此操作不可撤销。',
     confirmDeleteButton: '确认删除',
   },
+  traffic: {
+    myTraffic: '我的流量统计',
+    userTrafficToday: '用户今日流量',
+    todayTraffic: '今日流量',
+    upload: '上行',
+    download: '下行',
+    total: '合计',
+    history: '流量历史',
+    date: '日期',
+    noTrafficData: '暂无流量数据',
+    trafficHistory7d: '近 7 天流量',
+  },
   vpn: {
     title: 'VPN 管理',
     refresh: '刷新',

frontend/src/views/AdminView.vue

@@ -3,6 +3,7 @@ import { onMounted, onUnmounted, ref } from 'vue'
 import { useRouter } from 'vue-router'
 import { useI18n } from 'vue-i18n'
 import { useAuthStore } from '@/stores/auth'
+import TrafficChart from '@/components/TrafficChart.vue'
 
 const router = useRouter()
 const authStore = useAuthStore()
@@ -25,10 +26,35 @@ interface ClientInfo {
   ip: string
   ip6?: string
   connected_at: string
+  rx_bytes: number
+  tx_bytes: number
 }
 const vpnClients = ref<ClientInfo[]>([])
 const kickError = ref('')
 
+interface UserTraffic {
+  user_id: number
+  username: string
+  rx_bytes: number
+  tx_bytes: number
+  total_bytes: number
+}
+const userTrafficToday = ref<UserTraffic[]>([])
+
+interface TrafficRecord {
+  date: string
+  rx_bytes: number
+  tx_bytes: number
+}
+const siteTraffic7d = ref<TrafficRecord[]>([])
+
+function formatBytes(bytes: number): string {
+  if (bytes === 0) return '0 B'
+  const units = ['B', 'KB', 'MB', 'GB', 'TB']
+  const i = Math.floor(Math.log(bytes) / Math.log(1024))
+  return (bytes / Math.pow(1024, i)).toFixed(i > 0 ? 1 : 0) + ' ' + units[i]
+}
+
 function formatUptime(seconds: number): string {
   if (seconds <= 0) return '0m'
   const d = Math.floor(seconds / 86400)
@@ -82,6 +108,28 @@ async function fetchVpnStatus() {
   } catch {}
 }
 
+async function fetchTrafficToday() {
+  try {
+    const res = await fetch('/api/admin/traffic/today', {
+      headers: { Authorization: `Bearer ${authStore.token}` },
+    })
+    if (!res.ok) return
+    const data = await res.json()
+    userTrafficToday.value = (data.users || []).sort((a: UserTraffic, b: UserTraffic) => b.total_bytes - a.total_bytes)
+  } catch {}
+}
+
+async function fetchSiteTraffic7d() {
+  try {
+    const res = await fetch('/api/admin/traffic/history?days=7', {
+      headers: { Authorization: `Bearer ${authStore.token}` },
+    })
+    if (!res.ok) return
+    const data = await res.json()
+    siteTraffic7d.value = data.records || []
+  } catch {}
+}
+
 async function handleKick(userId: number, username: string) {
   kickError.value = ''
   if (userId === authStore.user?.id) {
@@ -107,9 +155,12 @@ onMounted(async () => {
   fetchUserCount()
   fetchStats()
   fetchVpnStatus()
+  fetchTrafficToday()
+  fetchSiteTraffic7d()
   statsTimer = setInterval(() => {
     fetchStats()
     fetchVpnStatus()
+    fetchTrafficToday()
   }, 30000)
 })
 
@@ -167,18 +218,22 @@ function handleStatClick(route: string) {
             <th class="px-6 py-3 text-left font-medium text-gray-500 dark:text-gray-400">{{ t('vpn.ipv4') }}</th>
             <th class="px-6 py-3 text-left font-medium text-gray-500 dark:text-gray-400">{{ t('vpn.ipv6') }}</th>
             <th class="px-6 py-3 text-left font-medium text-gray-500 dark:text-gray-400">{{ t('vpn.connectTime') }}</th>
+            <th class="px-6 py-3 text-right font-medium text-gray-500 dark:text-gray-400">{{ t('traffic.upload') }}</th>
+            <th class="px-6 py-3 text-right font-medium text-gray-500 dark:text-gray-400">{{ t('traffic.download') }}</th>
             <th class="px-6 py-3 text-left font-medium text-gray-500 dark:text-gray-400">{{ t('common.actions') }}</th>
           </tr>
         </thead>
         <tbody>
           <tr v-if="!vpnClients.length">
-            <td colspan="5" class="px-6 py-6 text-center text-gray-400">{{ t('vpn.noOnlineClients') }}</td>
+            <td colspan="7" class="px-6 py-6 text-center text-gray-400">{{ t('vpn.noOnlineClients') }}</td>
           </tr>
           <tr v-for="(c, i) in vpnClients" :key="i" class="border-b border-gray-100 dark:border-gray-700/50">
             <td class="px-6 py-3 text-gray-900 dark:text-white font-medium">{{ c.username }}</td>
             <td class="px-6 py-3 text-gray-700 dark:text-gray-300">{{ c.ip }}</td>
             <td class="px-6 py-3 text-gray-700 dark:text-gray-300">{{ c.ip6 || '-' }}</td>
             <td class="px-6 py-3 text-gray-500 dark:text-gray-400">{{ c.connected_at }}</td>
+            <td class="px-6 py-3 text-right text-gray-700 dark:text-gray-300 tabular-nums">{{ formatBytes(c.rx_bytes) }}</td>
+            <td class="px-6 py-3 text-right text-gray-700 dark:text-gray-300 tabular-nums">{{ formatBytes(c.tx_bytes) }}</td>
             <td class="px-6 py-3">
               <button
                 class="px-3 py-1 text-xs rounded-md font-medium text-red-700 bg-red-50 hover:bg-red-100 dark:text-red-400 dark:bg-red-900/20 transition-colors"
@@ -192,5 +247,35 @@ function handleStatClick(route: string) {
       </table>
       <p v-if="kickError" class="text-sm text-red-500 px-6 pb-4">{{ kickError }}</p>
     </div>
+
+    <div class="bg-white dark:bg-gray-800 rounded-xl shadow-sm border border-gray-200 dark:border-gray-700 p-6 mb-6">
+      <h3 class="text-lg font-semibold text-gray-900 dark:text-white mb-4">{{ t('traffic.trafficHistory7d') }}</h3>
+      <TrafficChart :records="siteTraffic7d" />
+    </div>
+
+    <div class="bg-white dark:bg-gray-800 rounded-xl shadow-sm border border-gray-200 dark:border-gray-700 overflow-hidden">
+      <h3 class="text-lg font-semibold text-gray-900 dark:text-white p-6 pb-4">{{ t('traffic.userTrafficToday') }}</h3>
+      <table class="w-full text-sm">
+        <thead>
+          <tr class="border-b border-gray-200 dark:border-gray-700 bg-gray-50 dark:bg-gray-800/50">
+            <th class="px-6 py-3 text-left font-medium text-gray-500 dark:text-gray-400">{{ t('common.username') }}</th>
+            <th class="px-6 py-3 text-right font-medium text-gray-500 dark:text-gray-400">{{ t('traffic.upload') }}</th>
+            <th class="px-6 py-3 text-right font-medium text-gray-500 dark:text-gray-400">{{ t('traffic.download') }}</th>
+            <th class="px-6 py-3 text-right font-medium text-gray-500 dark:text-gray-400">{{ t('traffic.total') }}</th>
+          </tr>
+        </thead>
+        <tbody>
+          <tr v-if="!userTrafficToday.length">
+            <td colspan="4" class="px-6 py-6 text-center text-gray-400">{{ t('traffic.noTrafficData') }}</td>
+          </tr>
+          <tr v-for="(u, i) in userTrafficToday" :key="i" class="border-b border-gray-100 dark:border-gray-700/50">
+            <td class="px-6 py-3 text-gray-900 dark:text-white font-medium">{{ u.username }}</td>
+            <td class="px-6 py-3 text-right text-gray-700 dark:text-gray-300 tabular-nums">{{ formatBytes(u.rx_bytes) }}</td>
+            <td class="px-6 py-3 text-right text-gray-700 dark:text-gray-300 tabular-nums">{{ formatBytes(u.tx_bytes) }}</td>
+            <td class="px-6 py-3 text-right text-gray-900 dark:text-white font-medium tabular-nums">{{ formatBytes(u.total_bytes) }}</td>
+          </tr>
+        </tbody>
+      </table>
+    </div>
   </div>
 </template>

frontend/src/views/ProfileView.vue

@@ -3,6 +3,7 @@ import { onMounted, ref } from 'vue'
 import { useRouter } from 'vue-router'
 import { useI18n } from 'vue-i18n'
 import { useAuthStore } from '@/stores/auth'
+import TrafficChart from '@/components/TrafficChart.vue'
 
 const authStore = useAuthStore()
 const router = useRouter()
@@ -16,6 +17,35 @@ interface VpnConnection {
 const vpnConnections = ref<VpnConnection[]>([])
 const maxConns = ref(30)
 
+interface TrafficRecord {
+  date: string
+  rx_bytes: number
+  tx_bytes: number
+}
+const myTraffic7d = ref<TrafficRecord[]>([])
+const todayRx = ref(0)
+const todayTx = ref(0)
+
+function formatBytes(bytes: number): string {
+  if (bytes === 0) return '0 B'
+  const units = ['B', 'KB', 'MB', 'GB', 'TB']
+  const i = Math.floor(Math.log(bytes) / Math.log(1024))
+  return (bytes / Math.pow(1024, i)).toFixed(i > 0 ? 1 : 0) + ' ' + units[i]
+}
+
+async function fetchMyTraffic() {
+  try {
+    const res = await fetch('/api/me/traffic?days=7', {
+      headers: { Authorization: `Bearer ${authStore.token}` },
+    })
+    if (!res.ok) return
+    const data = await res.json()
+    myTraffic7d.value = data.records || []
+    todayRx.value = data.today_rx_bytes || 0
+    todayTx.value = data.today_tx_bytes || 0
+  } catch {}
+}
+
 async function fetchVpnConnections() {
   try {
     const res = await fetch('/api/me/vpn/connections', {
@@ -31,6 +61,7 @@ async function fetchVpnConnections() {
 onMounted(async () => {
   await authStore.fetchUser()
   fetchVpnConnections()
+  fetchMyTraffic()
 })
 
 const showPasswordModal = ref(false)
@@ -94,6 +125,26 @@ async function handleChangePassword() {
       </div>
     </div>
 
+    <div class="bg-white dark:bg-gray-800 rounded-xl shadow-sm border border-gray-200 dark:border-gray-700 p-6 mb-6">
+      <h3 class="text-lg font-semibold text-gray-900 dark:text-white mb-4">{{ t('traffic.myTraffic') }}</h3>
+      <div class="grid grid-cols-3 gap-4 mb-6">
+        <div class="text-center">
+          <p class="text-xs text-gray-500 dark:text-gray-400 mb-1">{{ t('traffic.upload') }}</p>
+          <p class="text-lg font-bold text-sky-600 dark:text-sky-400 tabular-nums">{{ formatBytes(todayRx) }}</p>
+        </div>
+        <div class="text-center">
+          <p class="text-xs text-gray-500 dark:text-gray-400 mb-1">{{ t('traffic.download') }}</p>
+          <p class="text-lg font-bold text-green-600 dark:text-green-400 tabular-nums">{{ formatBytes(todayTx) }}</p>
+        </div>
+        <div class="text-center">
+          <p class="text-xs text-gray-500 dark:text-gray-400 mb-1">{{ t('traffic.total') }}</p>
+          <p class="text-lg font-bold text-gray-900 dark:text-white tabular-nums">{{ formatBytes(todayRx + todayTx) }}</p>
+        </div>
+      </div>
+      <h4 class="text-sm font-medium text-gray-700 dark:text-gray-300 mb-3">{{ t('traffic.trafficHistory7d') }}</h4>
+      <TrafficChart :records="myTraffic7d" />
+    </div>
+
     <div class="bg-white dark:bg-gray-800 rounded-xl shadow-sm border border-gray-200 dark:border-gray-700 overflow-hidden mb-6">
       <div class="flex items-center justify-between p-6 pb-4">
         <h3 class="text-lg font-semibold text-gray-900 dark:text-white">{{ t('profile.myVpnConnections') }}</h3>

internal/db/db.go

@@ -40,7 +40,7 @@ func Init(cfg *config.DatabaseConfig) error {
 		return fmt.Errorf("数据库连接失败: %w", err)
 	}
 
-	if err := DB.AutoMigrate(&model.User{}, &model.Session{}, &model.VpnSetting{}, &model.VpnReservation{}, &model.TrafficStat{}); err != nil {
+	if err := DB.AutoMigrate(&model.User{}, &model.Session{}, &model.VpnSetting{}, &model.VpnReservation{}, &model.TrafficStat{}, &model.UserTrafficStat{}); err != nil {
 		return fmt.Errorf("数据库迁移失败: %w", err)
 	}
 

internal/handler/traffic.go

@@ -0,0 +1,255 @@
+package handler
+
+import (
+	"net/http"
+	"strconv"
+	"time"
+
+	"lmvpn/internal/db"
+	"lmvpn/internal/model"
+	"lmvpn/internal/vpn"
+
+	"github.com/gin-gonic/gin"
+)
+
+type userTrafficItem struct {
+	UserID     uint   `json:"user_id"`
+	Username   string `json:"username"`
+	RxBytes    int64  `json:"rx_bytes"`
+	TxBytes    int64  `json:"tx_bytes"`
+	TotalBytes int64  `json:"total_bytes"`
+}
+
+type trafficRecord struct {
+	Date    string `json:"date"`
+	RxBytes int64  `json:"rx_bytes"`
+	TxBytes int64  `json:"tx_bytes"`
+}
+
+func parseDays(c *gin.Context) int {
+	days := 7
+	if d := c.Query("days"); d != "" {
+		if n, err := strconv.Atoi(d); err == nil && n > 0 && n <= 365 {
+			days = n
+		}
+	}
+	return days
+}
+
+func GetAdminTrafficToday(c *gin.Context) {
+	today := time.Now().Format("2006-01-02")
+
+	var stats []model.UserTrafficStat
+	db.DB.Where("date = ?", today).Find(&stats)
+
+	userIDs := make([]uint, 0, len(stats))
+	for _, s := range stats {
+		userIDs = append(userIDs, s.UserID)
+	}
+	nameMap := make(map[uint]string)
+	if len(userIDs) > 0 {
+		var users []model.User
+		db.DB.Where("id IN ?", userIDs).Find(&users)
+		for _, u := range users {
+			nameMap[u.ID] = u.Username
+		}
+	}
+
+	items := make([]userTrafficItem, 0, len(stats))
+	var totalRx, totalTx int64
+	seen := make(map[uint]bool)
+	for _, s := range stats {
+		liveRx, liveTx := int64(0), int64(0)
+		if vpn.VPN != nil && vpn.VPN.Running() {
+			liveRx, liveTx = vpn.VPN.UserLiveTraffic(s.UserID)
+		}
+		rx := s.RxBytes + liveRx
+		tx := s.TxBytes + liveTx
+		items = append(items, userTrafficItem{
+			UserID:     s.UserID,
+			Username:   nameMap[s.UserID],
+			RxBytes:    rx,
+			TxBytes:    tx,
+			TotalBytes: rx + tx,
+		})
+		totalRx += rx
+		totalTx += tx
+		seen[s.UserID] = true
+	}
+
+	if vpn.VPN != nil && vpn.VPN.Running() {
+		for _, ci := range vpn.VPN.ClientList() {
+			if seen[ci.UserID] {
+				continue
+			}
+			liveRx, liveTx := vpn.VPN.UserLiveTraffic(ci.UserID)
+			if liveRx == 0 && liveTx == 0 {
+				continue
+			}
+			var u model.User
+			if err := db.DB.First(&u, ci.UserID).Error; err != nil {
+				continue
+			}
+			items = append(items, userTrafficItem{
+				UserID:     ci.UserID,
+				Username:   u.Username,
+				RxBytes:    liveRx,
+				TxBytes:    liveTx,
+				TotalBytes: liveRx + liveTx,
+			})
+			totalRx += liveRx
+			totalTx += liveTx
+			seen[ci.UserID] = true
+		}
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"total_rx_bytes": totalRx,
+		"total_tx_bytes": totalTx,
+		"users":          items,
+	})
+}
+
+func GetAdminTrafficHistory(c *gin.Context) {
+	days := parseDays(c)
+	startDate := time.Now().AddDate(0, 0, -(days - 1)).Format("2006-01-02")
+	var stats []model.TrafficStat
+	db.DB.Where("date >= ?", startDate).Order("date asc").Find(&stats)
+
+	dateMap := make(map[string]trafficRecord, len(stats))
+	for _, s := range stats {
+		dateMap[s.Date] = trafficRecord{
+			Date:    s.Date,
+			RxBytes: s.RxBytes,
+			TxBytes: s.TxBytes,
+		}
+	}
+
+	out := make([]trafficRecord, 0, days)
+	for i := days - 1; i >= 0; i-- {
+		d := time.Now().AddDate(0, 0, -i).Format("2006-01-02")
+		if r, ok := dateMap[d]; ok {
+			out = append(out, r)
+		} else {
+			out = append(out, trafficRecord{Date: d})
+		}
+	}
+
+	today := time.Now().Format("2006-01-02")
+	var todayStat model.TrafficStat
+	db.DB.Where("date = ?", today).First(&todayStat)
+	liveRx, liveTx := int64(0), int64(0)
+	if vpn.VPN != nil && vpn.VPN.Running() {
+		liveRx, liveTx = vpn.VPN.TotalLiveTraffic()
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"today_rx_bytes": todayStat.RxBytes + liveRx,
+		"today_tx_bytes": todayStat.TxBytes + liveTx,
+		"records":        out,
+	})
+}
+
+func GetAdminUserTraffic(c *gin.Context) {	idStr := c.Param("id")
+	id, err := strconv.ParseUint(idStr, 10, 64)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "参数错误"})
+		return
+	}
+
+	var user model.User
+	if err := db.DB.First(&user, id).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "用户不存在"})
+		return
+	}
+
+	days := parseDays(c)
+	records := queryUserTraffic(uint(id), days)
+
+	today := time.Now().Format("2006-01-02")
+	var todayStat model.UserTrafficStat
+	db.DB.Where("user_id = ? AND date = ?", id, today).First(&todayStat)
+	liveRx, liveTx := int64(0), int64(0)
+	if vpn.VPN != nil && vpn.VPN.Running() {
+		liveRx, liveTx = vpn.VPN.UserLiveTraffic(uint(id))
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"user_id":          user.ID,
+		"username":         user.Username,
+		"today_rx_bytes":   todayStat.RxBytes + liveRx,
+		"today_tx_bytes":   todayStat.TxBytes + liveTx,
+		"today_live_rx":    liveRx,
+		"today_live_tx":    liveTx,
+		"records":          records,
+	})
+}
+
+func GetMyTrafficToday(c *gin.Context) {
+	userID, _ := c.Get("user_id")
+	uid := userID.(uint)
+
+	today := time.Now().Format("2006-01-02")
+	var stat model.UserTrafficStat
+	db.DB.Where("user_id = ? AND date = ?", uid, today).First(&stat)
+
+	liveRx, liveTx := int64(0), int64(0)
+	if vpn.VPN != nil && vpn.VPN.Running() {
+		liveRx, liveTx = vpn.VPN.UserLiveTraffic(uid)
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"rx_bytes": stat.RxBytes + liveRx,
+		"tx_bytes": stat.TxBytes + liveTx,
+	})
+}
+
+func GetMyTrafficHistory(c *gin.Context) {
+	userID, _ := c.Get("user_id")
+	uid := userID.(uint)
+
+	days := parseDays(c)
+	records := queryUserTraffic(uid, days)
+
+	today := time.Now().Format("2006-01-02")
+	var todayStat model.UserTrafficStat
+	db.DB.Where("user_id = ? AND date = ?", uid, today).First(&todayStat)
+	liveRx, liveTx := int64(0), int64(0)
+	if vpn.VPN != nil && vpn.VPN.Running() {
+		liveRx, liveTx = vpn.VPN.UserLiveTraffic(uid)
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"today_rx_bytes": todayStat.RxBytes + liveRx,
+		"today_tx_bytes": todayStat.TxBytes + liveTx,
+		"today_live_rx":  liveRx,
+		"today_live_tx":  liveTx,
+		"records":        records,
+	})
+}
+
+func queryUserTraffic(userID uint, days int) []trafficRecord {
+	startDate := time.Now().AddDate(0, 0, -(days - 1)).Format("2006-01-02")
+	var stats []model.UserTrafficStat
+	db.DB.Where("user_id = ? AND date >= ?", userID, startDate).Order("date asc").Find(&stats)
+
+	dateMap := make(map[string]trafficRecord, len(stats))
+	for _, s := range stats {
+		dateMap[s.Date] = trafficRecord{
+			Date:    s.Date,
+			RxBytes: s.RxBytes,
+			TxBytes: s.TxBytes,
+		}
+	}
+
+	out := make([]trafficRecord, 0, days)
+	for i := days - 1; i >= 0; i-- {
+		d := time.Now().AddDate(0, 0, -i).Format("2006-01-02")
+		if r, ok := dateMap[d]; ok {
+			out = append(out, r)
+		} else {
+			out = append(out, trafficRecord{Date: d})
+		}
+	}
+	return out
+}

internal/handler/user.go

@@ -144,6 +144,10 @@ func UpdateUser(c *gin.Context) {
 	updates := map[string]interface{}{}
 
 	if req.Status != nil {
+		if user.ID == currentUserID.(uint) && *req.Status != 1 {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "不能禁用自己的账号"})
+			return
+		}
 		updates["status"] = *req.Status
 	}
 

internal/handler/vpn.go

@@ -474,12 +474,11 @@ func KickUserClient(c *gin.Context) {
 	}
 
 	n := 0
+	db.DB.Model(&user).Update("status", 0)
+	db.DB.Model(&model.Session{}).Where("user_id = ?", id).Update("invalid", true)
 	if vpn.VPN != nil && vpn.VPN.Running() {
 		n = vpn.VPN.KickUser(uint(id))
 	}
 
-	db.DB.Model(&user).Update("status", 0)
-	db.DB.Model(&model.Session{}).Where("user_id = ?", id).Update("invalid", true)
-
 	c.JSON(http.StatusOK, gin.H{"message": "已断开用户连接并禁用账号", "kicked": n})
 }

internal/model/vpn.go

@@ -45,3 +45,16 @@ type TrafficStat struct {
 func (TrafficStat) TableName() string {
 	return "traffic_stats"
 }
+
+type UserTrafficStat struct {
+	ID        uint      `gorm:"primaryKey;autoIncrement"`
+	UserID    uint      `gorm:"uniqueIndex:idx_user_date;not null"`
+	Date      string    `gorm:"uniqueIndex:idx_user_date;size:10;not null"`
+	RxBytes   int64     `gorm:"default:0"`
+	TxBytes   int64     `gorm:"default:0"`
+	UpdatedAt time.Time
+}
+
+func (UserTrafficStat) TableName() string {
+	return "user_traffic_stats"
+}

internal/router/router.go

@@ -27,6 +27,8 @@ func Setup(r *gin.Engine) {
 		auth.GET("/me/sessions", handler.ListMySessions)
 		auth.DELETE("/me/sessions/:sessionId", handler.RevokeMySession)
 		auth.GET("/me/vpn/connections", handler.GetMyVpnConnections)
+		auth.GET("/me/traffic/today", handler.GetMyTrafficToday)
+		auth.GET("/me/traffic", handler.GetMyTrafficHistory)
 	}
 
 	admin := r.Group("/api/admin")
@@ -48,6 +50,10 @@ func Setup(r *gin.Engine) {
 		admin.POST("/vpn/reservations", handler.CreateVpnReservation)
 		admin.DELETE("/vpn/reservations/:id", handler.DeleteVpnReservation)
 		admin.DELETE("/vpn/clients/:id", handler.KickUserClient)
+
+		admin.GET("/traffic/today", handler.GetAdminTrafficToday)
+		admin.GET("/traffic/history", handler.GetAdminTrafficHistory)
+		admin.GET("/traffic/users/:id", handler.GetAdminUserTraffic)
 	}
 
 	distDir := http.Dir("./dist")

internal/vpn/service.go

@@ -27,6 +27,7 @@ type VpnService struct {
 	switchx   *PacketSwitch
 	tun       *TUNInterface
 	tunDone   chan struct{}
+	flushDone chan struct{}
 	running   bool
 	startedAt time.Time
 	clients   map[*tunnelConn]struct{}
@@ -50,16 +51,59 @@ func (s *VpnService) StartedAt() time.Time {
 	return s.startedAt
 }
 
+const trafficFlushPeriod = 60 * time.Second
+
 func (s *VpnService) TotalLiveTraffic() (rx, tx int64) {
 	s.mu.RLock()
 	for c := range s.clients {
-		rx += c.rxBytes.Load()
+		rx += c.rxBytes.Load() - c.flushedRx.Load()
-		tx += c.txBytes.Load()
+		tx += c.txBytes.Load() - c.flushedTx.Load()
 	}
 	s.mu.RUnlock()
 	return
 }
 
+func (s *VpnService) UserLiveTraffic(userID uint) (rx, tx int64) {
+	s.mu.RLock()
+	for c := range s.clients {
+		if c.user.ID == userID {
+			rx += c.rxBytes.Load() - c.flushedRx.Load()
+			tx += c.txBytes.Load() - c.flushedTx.Load()
+		}
+	}
+	s.mu.RUnlock()
+	return
+}
+
+func (s *VpnService) trafficFlusher() {
+	ticker := time.NewTicker(trafficFlushPeriod)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ticker.C:
+			s.flushAllTraffic()
+		case <-s.flushDone:
+			return
+		}
+	}
+}
+
+func (s *VpnService) flushAllTraffic() {
+	s.mu.RLock()
+	conns := make([]*tunnelConn, 0, len(s.clients))
+	for c := range s.clients {
+		conns = append(conns, c)
+	}
+	s.mu.RUnlock()
+
+	for _, c := range conns {
+		rx, tx := c.flushDelta()
+		if rx > 0 || tx > 0 {
+			recordTraffic(c.user.ID, rx, tx)
+		}
+	}
+}
+
 func (s *VpnService) Settings() model.VpnSetting {
 	s.mu.RLock()
 	defer s.mu.RUnlock()
@@ -150,11 +194,13 @@ func (s *VpnService) ApplySettings(settings model.VpnSetting, reservations4, res
 	s.switchx = NewPacketSwitch(settings.AllowClientToClient)
 	s.tun = tun
 	s.tunDone = make(chan struct{})
+	s.flushDone = make(chan struct{})
 	s.running = true
 	s.startedAt = time.Now()
 	s.mu.Unlock()
 
 	go s.serveTUN()
+	go s.trafficFlusher()
 
 	subnet4 := ipNet.String()
 	var subnet6Str string
@@ -205,10 +251,21 @@ func (s *VpnService) Stop() error {
 	s.running = false
 	tun := s.tun
 	done := s.tunDone
+	flushDone := s.flushDone
+	s.flushDone = nil
 	clients := s.clients
 	s.clients = make(map[*tunnelConn]struct{})
 	s.mu.Unlock()
 
+	if flushDone != nil {
+		close(flushDone)
+	}
+	for c := range clients {
+		rx, tx := c.flushDelta()
+		if rx > 0 || tx > 0 {
+			recordTraffic(c.user.ID, rx, tx)
+		}
+	}
 	for c := range clients {
 		c.close()
 	}
@@ -379,6 +436,8 @@ type ClientInfo struct {
 	IP          string `json:"ip"`
 	IP6         string `json:"ip6,omitempty"`
 	ConnectedAt string `json:"connected_at"`
+	RxBytes     int64  `json:"rx_bytes"`
+	TxBytes     int64  `json:"tx_bytes"`
 }
 
 func (s *VpnService) KickUser(userID uint) int {

internal/vpn/tunnel.go

@@ -40,11 +40,21 @@ type tunnelConn struct {
 	ready       atomic.Bool
 	rxBytes     atomic.Int64
 	txBytes     atomic.Int64
+	flushedRx   atomic.Int64
+	flushedTx   atomic.Int64
 }
 
 func (c *tunnelConn) AssignedIP() net.IP  { return c.assignedIP }
 func (c *tunnelConn) AssignedIP6() net.IP { return c.assignedIP6 }
 
+func (c *tunnelConn) flushDelta() (rx, tx int64) {
+	curRx := c.rxBytes.Load()
+	curTx := c.txBytes.Load()
+	rx = curRx - c.flushedRx.Swap(curRx)
+	tx = curTx - c.flushedTx.Swap(curTx)
+	return
+}
+
 func (c *tunnelConn) WritePacket(data []byte) error {
 	if !c.ready.Load() || len(data) == 0 {
 		return nil
@@ -82,6 +92,8 @@ func (c *tunnelConn) info() ClientInfo {
 		Username:    c.user.Username,
 		IP:          c.assignedIP.String(),
 		ConnectedAt: c.connectedAt.Format("2006-01-02 15:04:05"),
+		RxBytes:     c.rxBytes.Load(),
+		TxBytes:     c.txBytes.Load(),
 	}
 	if c.assignedIP6 != nil {
 		ci.IP6 = c.assignedIP6.String()
@@ -136,7 +148,8 @@ func runTunnel(conn *websocket.Conn, user *model.User) {
 
 	VPN.registerClient(tc)
 	defer func() {
-		recordTraffic(tc.rxBytes.Load(), tc.txBytes.Load())
+		rx, tx := tc.flushDelta()
+		recordTraffic(tc.user.ID, rx, tx)
 		VPN.unregisterClient(tc)
 	}()
 
@@ -236,11 +249,23 @@ func runTunnel(conn *websocket.Conn, user *model.User) {
 	}
 }
 
-func recordTraffic(rx, tx int64) {
+func recordTraffic(userID uint, rx, tx int64) {
 	if rx == 0 && tx == 0 {
 		return
 	}
 	today := time.Now().Format("2006-01-02")
+
+	userStat := model.UserTrafficStat{UserID: userID, Date: today, RxBytes: rx, TxBytes: tx}
+	if err := db.DB.Clauses(clause.OnConflict{
+		Columns: []clause.Column{{Name: "user_id"}, {Name: "date"}},
+		DoUpdates: clause.Assignments(map[string]interface{}{
+			"rx_bytes": gorm.Expr("rx_bytes + ?", rx),
+			"tx_bytes": gorm.Expr("tx_bytes + ?", tx),
+		}),
+	}).Create(&userStat).Error; err != nil {
+		log.Printf("记录用户流量失败: %v", err)
+	}
+
 	stat := model.TrafficStat{Date: today, RxBytes: rx, TxBytes: tx}
 	if err := db.DB.Clauses(clause.OnConflict{
 		Columns: []clause.Column{{Name: "date"}},