feat: complete E2E deployment flow with storage layered config and values template versioning

- Instance deployment: charts browser, deploy modal, instances list
- Values Template version management (create/history/rollback)
- Storage layered config (cluster > workspace > shared priority)
- Cluster credential decryptIfNeeded for mixed encrypted/plaintext kubeconfig
- YAML syntax validation (client-side + server-side warning)
- Frontend: charts, instances, storage, templates, admin pages
- Backend: storage service, instance service, cluster service, helm client
- Multi-Tenant Kubeconfig.md: added by user

backend/internal/domain/entity/workspace.go

@@ -9,17 +9,19 @@ type Workspace struct {
 	ID          string
 	Name        string
 	Description string
-	CreatedBy   string // 创建者用户 ID
+	ClusterIDs  []string // 关联的集群 ID 列表
+	CreatedBy   string   // 创建者用户 ID
 	CreatedAt   time.Time
 	UpdatedAt   time.Time
 }
 
 // NewWorkspace 创建新工作空间
-func NewWorkspace(name, description, createdBy string) *Workspace {
+func NewWorkspace(name, description, createdBy string, clusterIDs []string) *Workspace {
 	now := time.Now()
 	return &Workspace{
 		Name:        name,
 		Description: description,
+		ClusterIDs:  clusterIDs,
 		CreatedBy:   createdBy,
 		CreatedAt:   now,
 		UpdatedAt:   now,