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/adapter/output/persistence/postgres/registry_repository.go

@@ -208,7 +208,7 @@ func (r *RegistryRepository) Delete(ctx context.Context, id string) error {
 // List 列出所有 Registries
 func (r *RegistryRepository) List(ctx context.Context) ([]*entity.Registry, error) {
 	query := `
-		SELECT id, name, url, description, username, password, insecure, created_at, updated_at
+		SELECT id, workspace_id, owner_id, name, url, description, username, password, insecure, is_shared, created_at, updated_at
 		FROM registries
 		ORDER BY created_at DESC
 	`
@@ -222,16 +222,19 @@ func (r *RegistryRepository) List(ctx context.Context) ([]*entity.Registry, erro
 	registries := make([]*entity.Registry, 0)
 	for rows.Next() {
 		registry := &entity.Registry{}
-		var encryptedPassword string
+		var encryptedPassword, workspaceID, ownerID sql.NullString
 
 		err := rows.Scan(
 			&registry.ID,
+			&workspaceID,
+			&ownerID,
 			&registry.Name,
 			&registry.URL,
 			&registry.Description,
 			&registry.Username,
 			&encryptedPassword,
 			&registry.Insecure,
+			&registry.IsShared,
 			&registry.CreatedAt,
 			&registry.UpdatedAt,
 		)
@@ -239,10 +242,13 @@ func (r *RegistryRepository) List(ctx context.Context) ([]*entity.Registry, erro
 			return nil, fmt.Errorf("failed to scan registry: %w", err)
 		}
 
+		// 处理 NULL 值
+		registry.WorkspaceID = workspaceID.String
+		registry.OwnerID = ownerID.String
+
 		// 解密密码
-		registry.Password, err = r.encryptor.Decrypt(encryptedPassword)
-		if err != nil {
-			return nil, fmt.Errorf("failed to decrypt password: %w", err)
+		if encryptedPassword.Valid {
+			registry.Password, _ = r.encryptor.Decrypt(encryptedPassword.String)
 		}
 
 		registries = append(registries, registry)