refactor: 前后端目录结构模块化 + v2 优化移植与缺陷修复

前端:
- src/srv/api → src/api，按域分文件夹(auth/cluster/host/storage/deployment/collector)
- 新增 http.ts 引擎(http.get/post/put/delete)，域模块改用语义化调用
- index.html 增加 favicon(匹配应用 logo 的 emerald + Activity 脉冲)

后端分层增强(保留包名):
- 新增 repository/：从 models 拆出 JsonDB 持久化层(InitDB/GetDB/Shutdown/RequestSave)
- 新增 dto/：从 controllers 抽出各域请求契约(带 binding 校验)
- 新增 pkg/crypto、pkg/jwt：从 utils 拆出安全原语(外部 jwt 别名 jwtv5 避免冲突)
- models 只留领域实体 + sanitizer；utils 只留 gin/应用相关(response/errors)

v2 优化移植与缺陷修复:
- 移植密钥分离/SSH TOFU/并发写安全/Loki 生产级配置/Docker 加固
- 修复 deployment.go 并发丢更新、Helm values 重复键、EncryptField 哨兵、loki-gateway 端点等审计缺陷
- 实现真正的优雅关停(main.go http.Server + signal + repository.Shutdown)
- 修复登录契约:后端返回 accessToken，前端 auth.ts/Login.tsx 对齐
- 补 crypto/jwt/repository 单元测试(含并发写回归)

验证: go build/vet/test 全绿；npm run build 通过；登录→鉴权→优雅关停冒烟通过

Co-Authored-By: Claude <noreply@anthropic.com>

backend/services/cluster.go

@@ -7,7 +7,9 @@ import (
 	"path/filepath"
 	"time"
 
+	"lokideploy/config"
 	"lokideploy/models"
+	"lokideploy/repository"
 	"lokideploy/utils"
 )
 
@@ -18,8 +20,8 @@ func NewClusterService() *ClusterService {
 }
 
 func SaveKubeConfig(name, content string) (string, error) {
-	dir := filepath.Join("data", "kubeconfigs")
-	if err := os.MkdirAll(dir, 0755); err != nil {
+	dir := config.GetConfig().KubeDir
+	if err := os.MkdirAll(dir, 0700); err != nil {
 		return "", err
 	}
 	path := filepath.Join(dir, fmt.Sprintf("%s.yaml", name))
@@ -37,7 +39,9 @@ func (s *ClusterService) Create(name, description, configType, apiServer, kubeco
 
 	finalKubeconfig := kubeconfig
 	if configType == "token" {
-		finalKubeconfig = BuildKubeconfigFromToken(apiServer, token)
+		// 安全默认：不嵌入 CA、不跳过 TLS 验证，依赖系统 CA 池。
+		// 自签证书的集群请改用 kubeconfig 模式（其内含 CA 证书）。
+		finalKubeconfig = BuildKubeconfigFromToken(apiServer, token, "", false)
 	}
 	// 展示用 APIServer：token 模式取入参，kubeconfig 模式从内容提取
 	if apiServer == "" {
@@ -50,7 +54,7 @@ func (s *ClusterService) Create(name, description, configType, apiServer, kubeco
 	}
 
 	cluster := models.Cluster{
-		ID:             models.GetDB().NextID("clusters"),
+		ID:             repository.GetDB().NextID("clusters"),
 		Name:           name,
 		Description:    description,
 		ConfigType:     configType,
@@ -63,18 +67,18 @@ func (s *ClusterService) Create(name, description, configType, apiServer, kubeco
 		UpdatedAt:      time.Now(),
 	}
 
-	db := models.GetDB()
+	db := repository.GetDB()
 	db.Lock()
 	db.Clusters = append(db.Clusters, cluster)
 	db.Unlock()
-	go db.Save()
+	db.RequestSave()
 
 	go s.Validate(cluster.ID)
 	return &cluster, nil
 }
 
 func (s *ClusterService) Get(id uint) (*models.Cluster, error) {
-	db := models.GetDB()
+	db := repository.GetDB()
 	db.RLock()
 	defer db.RUnlock()
 	for i := range db.Clusters {
@@ -87,7 +91,7 @@ func (s *ClusterService) Get(id uint) (*models.Cluster, error) {
 }
 
 func (s *ClusterService) List(page, pageSize int) ([]models.Cluster, int64, error) {
-	db := models.GetDB()
+	db := repository.GetDB()
 	db.RLock()
 	defer db.RUnlock()
 
@@ -106,7 +110,7 @@ func (s *ClusterService) List(page, pageSize int) ([]models.Cluster, int64, erro
 }
 
 func (s *ClusterService) Update(id uint, updates map[string]interface{}) error {
-	db := models.GetDB()
+	db := repository.GetDB()
 	db.Lock()
 	defer db.Unlock()
 	for i := range db.Clusters {
@@ -147,7 +151,7 @@ func (s *ClusterService) Update(id uint, updates map[string]interface{}) error {
 				}
 			}
 			db.Clusters[i].UpdatedAt = time.Now()
-			go db.Save()
+			db.RequestSave()
 			return nil
 		}
 	}
@@ -155,7 +159,7 @@ func (s *ClusterService) Update(id uint, updates map[string]interface{}) error {
 }
 
 func (s *ClusterService) Delete(id uint) error {
-	db := models.GetDB()
+	db := repository.GetDB()
 	db.Lock()
 	defer db.Unlock()
 	for i, c := range db.Clusters {
@@ -164,7 +168,7 @@ func (s *ClusterService) Delete(id uint) error {
 				_ = os.Remove(c.KubeConfigPath)
 			}
 			db.Clusters = append(db.Clusters[:i], db.Clusters[i+1:]...)
-			go db.Save()
+			db.RequestSave()
 			return nil
 		}
 	}