feat: 日志中心 + GRE协议支持 + 流量监控 + 部署脚本

- 新增日志中心功能 (api/logapi.go + Logs.vue)
- 新增GRE协议服务支持 (service/gre/)
- 新增流量监控组件 (TrafficChart.vue)
- 新增L2TP/IPSec测试用例
- 新增日志轮转服务 (logrotate.go)
- 新增部署脚本 (scripts/install.sh, uninstall.sh, service文件)
- 更新i18n国际化文件
- 优化后端API和前端路由

frontend/src/views/Settings.vue

@@ -45,15 +45,9 @@
     <el-col :xs="24" :lg="14" v-if="auth.isAdmin()">
       <el-card class="page-card" shadow="never">
         <template #header><b>{{ $t('settings.auditTitle') }}</b></template>
-        <el-table :data="logs" size="small" max-height="560" v-loading="auditLoading">
-          <el-table-column prop="created_at" :label="$t('common.time')" width="170">
-            <template #default="{ row }">{{ new Date(row.created_at).toLocaleString() }}</template>
-          </el-table-column>
-          <el-table-column prop="username" :label="$t('common.username')" width="90" />
-          <el-table-column prop="action" :label="$t('common.action')" width="140" />
-          <el-table-column prop="target" :label="$t('common.target')" show-overflow-tooltip />
-          <template #empty><el-empty :description="$t('settings.noAuditLogs')" /></template>
-        </el-table>
+        <el-empty :description="$t('settings.auditMigrated')">
+          <el-button type="primary" @click="$router.push('/logs')">{{ $t('router.logs') }}</el-button>
+        </el-empty>
       </el-card>
     </el-col>
 
@@ -83,8 +77,6 @@ import api, { auth } from '../api'
 const { t } = useI18n()
 const pwd = ref({ old_password: '', new_password: '', confirm: '' })
 const pwdLoading = ref(false)
-const logs = ref([])
-const auditLoading = ref(false)
 const mfa = ref({ enabled: false, uri: '', code: '' })
 const mfaCanvas = ref(null)
 const mfaLoading = ref(false)
@@ -110,13 +102,6 @@ onMounted(async () => {
     const status = await api.get('/mfa/status')
     mfa.value.enabled = status.data.enabled
   } catch { /* ignore */ }
-  if (auth.isAdmin()) {
-    auditLoading.value = true
-    try {
-      const audit = await api.get('/audit')
-      logs.value = audit.data || []
-    } catch { /* viewer */ } finally { auditLoading.value = false }
-  }
 })
 
 async function setupMFA() {