feat(audit): F1+F2 告警静默规则标记完成 + 审计日志CSV导出实现

F1 告警静默规则 [done]:
- 后端 alert_silence.go: CRUD + Toggle (onetime/daily/weekly 三模式)
- 告警引擎 isSilenced 集成 (alert_engine.go)
- 前端 SilenceRuleTab + SilenceDialog
- 路由 /alerts/silences 已注册

F2 审计日志导出 [done]:
- 重写 ExportAuditLogs: 真正的 CSV 导出 (encoding/csv + UTF-8 BOM)
- 支持 module/action/username/startTime/endTime 筛选
- 导出限制 10000 条防溢出，自动记录审计日志
- JSON 格式向后兼容 (format=json)
- 前端 exportLogs 传递查询参数

同时包含累积的前期工作:
- 目录重构 internal/ -> controller/model/router (v0.55-v0.57)
- 后端分层架构 dto/repository/service/utils
- 审计模块全功能 (终端审计/操作审计/登录日志)
- asciicast v2 录制格式
- SFTP 文件浏览器
- StatStrip 紧凑统计条
- 在线会话自动刷新
- LiveMonitor WebSocket 诊断修复

验证: go build ✅ | npm run build ✅ | Docker 部署 ✅ | 10 回归端点 ✅ | CSV 导出 ✅ | 静默 CRUD ✅

backend/scripts/seed_kubernetes_resources.go

@@ -9,8 +9,8 @@ import (
 	"math/rand"
 	"time"
 
-	"ezops/internal/config"
-	"ezops/internal/models"
+	"ezops/config"
+	"ezops/model"
 	"ezops/pkg/database"
 )
 
@@ -23,7 +23,7 @@ func main() {
 	}
 	rand.Seed(time.Now().UnixNano())
 
-	var clusters []models.KubernetesCluster
+	var clusters []model.KubernetesCluster
 	db.Find(&clusters)
 	if len(clusters) == 0 {
 		fmt.Println("No clusters found — run mock.go first")
@@ -54,7 +54,7 @@ func main() {
 	for _, cluster := range clusters {
 		// Skip if pods already exist for this cluster
 		var podCount int64
-		db.Model(&models.KubernetesPod{}).Where("cluster_id = ?", cluster.ID).Count(&podCount)
+		db.Model(&model.KubernetesPod{}).Where("cluster_id = ?", cluster.ID).Count(&podCount)
 		if podCount > 0 {
 			fmt.Printf("Cluster %s already has %d pods, skipping\n", cluster.Name, podCount)
 			continue
@@ -79,7 +79,7 @@ func main() {
 			if available < 0 {
 				available = 0
 			}
-			db.Create(&models.KubernetesDeployment{
+			db.Create(&model.KubernetesDeployment{
 				ClusterID:         cluster.ID,
 				Namespace:         namespaces[rand.Intn(len(namespaces))],
 				Name:              depNames[d],
@@ -94,7 +94,7 @@ func main() {
 		// Pods
 		numPods := 12 + rand.Intn(18)
 		for p := 0; p < numPods; p++ {
-			db.Create(&models.KubernetesPod{
+			db.Create(&model.KubernetesPod{
 				ClusterID:    cluster.ID,
 				Namespace:    namespaces[rand.Intn(len(namespaces))],
 				Name:         fmt.Sprintf("%s-pod-%d", cluster.Code, p+1),
@@ -126,7 +126,7 @@ func main() {
 			default:
 				ports = `[{"port":3306,"protocol":"TCP","targetPort":3306}]`
 			}
-			svc := models.KubernetesService{
+			svc := model.KubernetesService{
 				ClusterID:  cluster.ID,
 				Namespace:  namespaces[rand.Intn(len(namespaces))],
 				Name:       svcNames[s],
@@ -150,7 +150,7 @@ func main() {
 			numIngs = len(ingNames)
 		}
 		for ig := 0; ig < numIngs; ig++ {
-			db.Create(&models.KubernetesIngress{
+			db.Create(&model.KubernetesIngress{
 				ClusterID: cluster.ID,
 				Namespace: namespaces[rand.Intn(len(namespaces))],
 				Name:      ingNames[ig],
@@ -162,9 +162,9 @@ func main() {
 
 		// Update cluster counts to match actual data
 		var depCnt, podCnt, svcCnt int64
-		db.Model(&models.KubernetesDeployment{}).Where("cluster_id = ?", cluster.ID).Count(&depCnt)
-		db.Model(&models.KubernetesPod{}).Where("cluster_id = ?", cluster.ID).Count(&podCnt)
-		db.Model(&models.KubernetesService{}).Where("cluster_id = ?", cluster.ID).Count(&svcCnt)
+		db.Model(&model.KubernetesDeployment{}).Where("cluster_id = ?", cluster.ID).Count(&depCnt)
+		db.Model(&model.KubernetesPod{}).Where("cluster_id = ?", cluster.ID).Count(&podCnt)
+		db.Model(&model.KubernetesService{}).Where("cluster_id = ?", cluster.ID).Count(&svcCnt)
 		db.Model(&cluster).Updates(map[string]interface{}{
 			"deployment_count": depCnt,
 		})