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/repository/cluster_repository.go

@@ -9,20 +9,26 @@ import (
 type ClusterRepository interface {
 	// Create 创建集群
 	Create(ctx context.Context, cluster *entity.Cluster) error
-	
+
 	// GetByID 根据 ID 获取集群
 	GetByID(ctx context.Context, id string) (*entity.Cluster, error)
-	
+
 	// GetByName 根据名称获取集群
 	GetByName(ctx context.Context, name string) (*entity.Cluster, error)
-	
+
 	// Update 更新集群
 	Update(ctx context.Context, cluster *entity.Cluster) error
-	
+
 	// Delete 删除集群
 	Delete(ctx context.Context, id string) error
-	
+
 	// List 列出所有集群
 	List(ctx context.Context) ([]*entity.Cluster, error)
+
+	// GetByWorkspace 获取 workspace 的所有集群（包括共享集群）
+	GetByWorkspace(ctx context.Context, workspaceID string) ([]*entity.Cluster, error)
+
+	// GetShared 获取所有共享集群
+	GetShared(ctx context.Context) ([]*entity.Cluster, error)
 }