feat(frontend): add Helm chart browser, monitoring, chart-references and values templates pages

Add new frontend pages for the multi-tenant OCDP platform:

- Charts page (/charts): Browse Harbor OCI registries to list Helm chart repositories
  and versions, with deploy modal to launch charts on selected clusters
- Monitoring page (/monitoring): Display cluster metrics (CPU/Memory/GPU usage)
  and per-node details with resource utilization bars
- Chart References page (/chart-references): CRUD for chart metadata references
- Values Templates page (/templates): CRUD for Helm values templates with version
  history and rollback support
- Sidebar: Add Charts navigation, update Storage and Templates links
- api.ts: Add all API client functions (clusterApi, registryApi, instanceApi,
  monitoringApi, storageApi, chartReferenceApi, valuesTemplateApi,
  workspaceApi, userApi) with full TypeScript types

Note: deploy flow and values template rollback not yet end-to-end tested.

backend/internal/domain/service/instance_service.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 	"time"
 
 	"github.com/google/uuid"
@@ -336,9 +337,17 @@ func (s *InstanceService) executeAndSyncRollback(ctx context.Context, instanceID
 
 // executeAndSyncUninstall 异步执行卸载并监控状态
 func (s *InstanceService) executeAndSyncUninstall(ctx context.Context, instanceID string, cluster *entity.Cluster, releaseName, namespace string) {
+	// 先验证 release 名称是否有效
+	// 如果名称无效，说明这个 release 根本不可能存在于 Helm 中，直接删除数据库记录
+	if err := entity.ValidateReleaseName(releaseName); err != nil {
+		// Release 名称无效，直接删除数据库记录
+		_ = s.instanceRepo.Delete(ctx, instanceID)
+		return
+	}
+
 	// 执行 Helm 卸载
 	err := s.helmClient.Uninstall(ctx, cluster, releaseName, namespace)
-	
+
 	// 获取实例
 	instance, getErr := s.instanceRepo.GetByID(ctx, instanceID)
 	if getErr != nil {
@@ -346,13 +355,22 @@ func (s *InstanceService) executeAndSyncUninstall(ctx context.Context, instanceI
 	}
 
 	if err != nil {
-		// 如果错误不是"未找到"，则标记为失败
-		if !errors.Is(err, entity.ErrInstanceNotFound) {
-			instance.MarkFailure("Helm uninstall failed", err)
-			_ = s.instanceRepo.Update(ctx, instance)
-		} else {
-			// 如果未找到，说明已经卸载，直接删除数据库记录
+		// 检查错误类型
+		if errors.Is(err, entity.ErrInstanceNotFound) {
+			// 未找到，说明已经卸载，直接删除数据库记录
 			_ = s.instanceRepo.Delete(ctx, instanceID)
+		} else {
+			// 检查是否是 release 名称无效的错误（可能在某些情况下 Helm 会返回这个错误）
+			errMsg := strings.ToLower(err.Error())
+			if strings.Contains(errMsg, "release name is invalid") ||
+			   (strings.Contains(errMsg, "invalid") && strings.Contains(errMsg, "release")) {
+				// Release 名称无效，直接删除数据库记录
+				_ = s.instanceRepo.Delete(ctx, instanceID)
+			} else {
+				// 其他错误，标记为失败
+				instance.MarkFailure("Helm uninstall failed", err)
+				_ = s.instanceRepo.Update(ctx, instance)
+			}
 		}
 		return
 	}
@@ -360,7 +378,7 @@ func (s *InstanceService) executeAndSyncUninstall(ctx context.Context, instanceI
 	// 卸载成功，标记为已卸载
 	instance.MarkSuccess(entity.StatusUninstalled, instance.Revision, "Instance uninstalled successfully")
 	_ = s.instanceRepo.Update(ctx, instance)
-	
+
 	// 验证卸载是否完成：尝试获取状态，如果获取不到说明已卸载
 	time.Sleep(3 * time.Second)
 	_, statusErr := s.helmClient.GetStatus(ctx, cluster, releaseName, namespace)