fix: direct K8s scaling, replicas from K8s API, button labels, modify fetch

- Add ScaleClient using K8s API (like kubectl scale deploy --replicas=N)
  - ScaleDeployment: patch Deployment.Spec.Replicas directly
  - GetDeploymentReplicas: query actual K8s deployment replicas
  - Search by labels then fallback to deployment name match
- Wire ScaleClient to InstanceService via SetScaleClient in main.go
- ModifyModal: fetch full instance detail on open (list excludes values)
- InstanceCard: add text labels to action buttons (Entries/Diag/Modify/Delete)
  - Text visible on sm+ screens, icon-only on xs

backend/cmd/api/main.go

@@ -34,6 +34,7 @@ import (
 
 	"github.com/ocdp/cluster-service/internal/adapter/input/http/rest"
 	"github.com/ocdp/cluster-service/internal/adapter/output"
+	"github.com/ocdp/cluster-service/internal/adapter/output/k8s"
 	"github.com/ocdp/cluster-service/internal/bootstrap"
 	"github.com/ocdp/cluster-service/internal/domain/service"
 	"github.com/ocdp/cluster-service/internal/pkg/authz"
@@ -104,6 +105,7 @@ func main() {
 	)
 	instanceService.SetDiagnosticsClient(repos.DiagnosticsClient)
 	instanceService.SetTenantProvisioning(repos.WorkspaceRepo, repos.TenantKubeClient)
+	instanceService.SetScaleClient(k8s.NewScaleClient())
 
 	monitoringService := service.NewMonitoringService(
 		repos.ClusterRepo,

backend/internal/adapter/input/http/rest/instance_handler.go

@@ -566,17 +566,6 @@ func formatTime(value time.Time) string {
 }
 
 func convertInstanceResponse(instance *entity.Instance, includeValues bool) *dto.InstanceResponse {
-	replicas := 0
-	if v, ok := instance.Values["replicaCount"]; ok {
-		switch n := v.(type) {
-		case float64:
-			replicas = int(n)
-		case int:
-			replicas = n
-		case int64:
-			replicas = int(n)
-		}
-	}
 	response := &dto.InstanceResponse{
 		ID:             instance.ID,
 		ClusterID:      instance.ClusterID,
@@ -594,7 +583,7 @@ func convertInstanceResponse(instance *entity.Instance, includeValues bool) *dto
 		LastOperation:  string(instance.LastOperation),
 		LastError:      instance.LastError,
 		Revision:       instance.Revision,
-		Replicas:       replicas,
+		Replicas:       0,
 		AllowedActions: []string{"view", "update", "delete"},
 		CreatedAt:      instance.CreatedAt.Format("2006-01-02T15:04:05Z07:00"),
 		UpdatedAt:      instance.UpdatedAt.Format("2006-01-02T15:04:05Z07:00"),

backend/internal/adapter/output/k8s/scale_client.go

@@ -0,0 +1,134 @@
+package k8s
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/ocdp/cluster-service/internal/domain/entity"
+	appsv1 "k8s.io/api/apps/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/kubernetes"
+)
+
+// ScaleClient provides K8s-native workload scaling (bypasses Helm)
+type ScaleClient struct{}
+
+// NewScaleClient creates a ScaleClient
+func NewScaleClient() *ScaleClient {
+	return &ScaleClient{}
+}
+
+// findDeployment searches for a deployment matching the release name using various label strategies.
+func (c *ScaleClient) findDeployment(ctx context.Context, clientset *kubernetes.Clientset, namespace, releaseName string) (*appsv1.Deployment, error) {
+	labelQueries := []string{
+		fmt.Sprintf("app.kubernetes.io/instance=%s", releaseName),
+		fmt.Sprintf("release=%s", releaseName),
+		fmt.Sprintf("app=%s", releaseName),
+		fmt.Sprintf("app.kubernetes.io/name=%s", releaseName),
+	}
+
+	for _, query := range labelQueries {
+		deployments, err := clientset.AppsV1().Deployments(namespace).List(ctx, metav1.ListOptions{
+			LabelSelector: query,
+		})
+		if err != nil {
+			continue
+		}
+		if len(deployments.Items) > 0 {
+			return &deployments.Items[0], nil
+		}
+	}
+
+	// Fallback: get by name directly
+	dep, err := clientset.AppsV1().Deployments(namespace).Get(ctx, releaseName, metav1.GetOptions{})
+	if err == nil && dep != nil {
+		return dep, nil
+	}
+
+	return nil, nil
+}
+
+// GetDeploymentReplicas returns the current replicas count for a deployment.
+func (c *ScaleClient) GetDeploymentReplicas(ctx context.Context, cluster *entity.Cluster, namespace, releaseName string) (int32, error) {
+	clientset, err := c.clientsetForCluster(cluster)
+	if err != nil {
+		return 0, fmt.Errorf("failed to create k8s client: %w", err)
+	}
+
+	dep, err := c.findDeployment(ctx, clientset, namespace, releaseName)
+	if err != nil {
+		return 0, err
+	}
+	if dep != nil && dep.Spec.Replicas != nil {
+		return *dep.Spec.Replicas, nil
+	}
+
+	// Fallback to statefulsets
+	return c.getStatefulSetReplicas(ctx, clientset, namespace, releaseName)
+}
+
+func (c *ScaleClient) getStatefulSetReplicas(ctx context.Context, clientset *kubernetes.Clientset, namespace, releaseName string) (int32, error) {
+	stsList, err := clientset.AppsV1().StatefulSets(namespace).List(ctx, metav1.ListOptions{
+		LabelSelector: fmt.Sprintf("app.kubernetes.io/instance=%s", releaseName),
+	})
+	if err != nil {
+		return 0, err
+	}
+	if len(stsList.Items) == 0 {
+		return 0, nil // No replicable workload found
+	}
+	sts := stsList.Items[0]
+	if sts.Spec.Replicas != nil {
+		return *sts.Spec.Replicas, nil
+	}
+	return 0, nil
+}
+
+// ScaleDeployment scales the K8s deployment directly (bypasses Helm).
+func (c *ScaleClient) ScaleDeployment(ctx context.Context, cluster *entity.Cluster, namespace, releaseName string, replicas int32) error {
+	clientset, err := c.clientsetForCluster(cluster)
+	if err != nil {
+		return fmt.Errorf("failed to create k8s client: %w", err)
+	}
+
+	dep, err := c.findDeployment(ctx, clientset, namespace, releaseName)
+	if err != nil {
+		return err
+	}
+	if dep != nil {
+		dep.Spec.Replicas = &replicas
+		_, err = clientset.AppsV1().Deployments(namespace).Update(ctx, dep, metav1.UpdateOptions{})
+		if err != nil {
+			return fmt.Errorf("failed to scale deployment %s: %w", dep.Name, err)
+		}
+		return nil
+	}
+
+	// Try StatefulSets
+	stsList, err := clientset.AppsV1().StatefulSets(namespace).List(ctx, metav1.ListOptions{
+		LabelSelector: fmt.Sprintf("app.kubernetes.io/instance=%s", releaseName),
+	})
+	if err == nil && len(stsList.Items) > 0 {
+		sts := stsList.Items[0]
+		sts.Spec.Replicas = &replicas
+		_, err = clientset.AppsV1().StatefulSets(namespace).Update(ctx, &sts, metav1.UpdateOptions{})
+		if err != nil {
+			return fmt.Errorf("failed to scale statefulset %s: %w", sts.Name, err)
+		}
+		return nil
+	}
+
+	return fmt.Errorf("no deployment or statefulset found for release %s in namespace %s", releaseName, namespace)
+}
+
+func (c *ScaleClient) clientsetForCluster(cluster *entity.Cluster) (*kubernetes.Clientset, error) {
+	restConfig, err := restConfigFromCluster(cluster)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create rest config: %w", err)
+	}
+	clientset, err := kubernetes.NewForConfig(restConfig)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create clientset: %w", err)
+	}
+	return clientset, nil
+}

backend/internal/domain/service/instance_service.go

@@ -17,6 +17,12 @@ import (
 	"k8s.io/apimachinery/pkg/api/resource"
 )
 
+// ScaleClient defines the interface for K8s-native workload scaling
+type ScaleClient interface {
+	GetDeploymentReplicas(ctx context.Context, cluster *entity.Cluster, namespace, releaseName string) (int32, error)
+	ScaleDeployment(ctx context.Context, cluster *entity.Cluster, namespace, releaseName string, replicas int32) error
+}
+
 // InstanceService Helm 实例管理领域服务
 type InstanceService struct {
 	instanceRepo  repository.InstanceRepository
@@ -29,6 +35,7 @@ type InstanceService struct {
 	diagClient    repository.InstanceDiagnosticsClient
 	workspaceRepo repository.WorkspaceRepository
 	tenantClient  repository.TenantKubeClient
+	scaleClient   ScaleClient
 }
 
 // NewInstanceService 创建实例服务
@@ -60,6 +67,10 @@ func (s *InstanceService) SetDiagnosticsClient(client repository.InstanceDiagnos
 	s.diagClient = client
 }
 
+func (s *InstanceService) SetScaleClient(client ScaleClient) {
+	s.scaleClient = client
+}
+
 func (s *InstanceService) SetTenantProvisioning(workspaceRepo repository.WorkspaceRepository, tenantClient repository.TenantKubeClient) {
 	s.workspaceRepo = workspaceRepo
 	s.tenantClient = tenantClient
@@ -436,7 +447,13 @@ func (s *InstanceService) ScaleInstance(ctx context.Context, clusterID, instance
 		return nil, entity.ErrClusterNotFound
 	}
 
-	// Get existing Helm values and patch replicaCount
+	// Scale via K8s API directly (like kubectl scale deploy --replicas=N)
+	if s.scaleClient != nil {
+		if err := s.scaleClient.ScaleDeployment(ctx, cluster, instance.Namespace, instance.Name, int32(replicas)); err != nil {
+			return nil, fmt.Errorf("failed to scale deployment: %w", err)
+		}
+	} else {
+		// Fallback: Helm upgrade with replicaCount
 		vals, err := s.helmClient.GetValues(ctx, cluster, instance.Name, instance.Namespace)
 		if err != nil {
 			return nil, fmt.Errorf("failed to get current values: %w", err)
@@ -445,17 +462,29 @@ func (s *InstanceService) ScaleInstance(ctx context.Context, clusterID, instance
 			vals = make(map[string]interface{})
 		}
 		vals["replicaCount"] = replicas
-
 		instance.SetValues(vals)
 		instance.BeginOperation(entity.OperationUpgrade, fmt.Sprintf("Scaling to %d replicas", replicas))
 		if err := s.instanceRepo.Update(ctx, instance); err != nil {
 			return nil, err
 		}
-
 		go s.executeAndSyncUpgrade(context.Background(), instance.ID, cluster, nil, instance)
+	}
+
 	return instance, nil
 }
 
+// GetRunningReplicas returns the actual K8s deployment replicas count.
+func (s *InstanceService) GetRunningReplicas(ctx context.Context, cluster *entity.Cluster, instance *entity.Instance) int {
+	if s.scaleClient == nil {
+		return 0
+	}
+	r, err := s.scaleClient.GetDeploymentReplicas(ctx, cluster, instance.Namespace, instance.Name)
+	if err != nil {
+		return 0
+	}
+	return int(r)
+}
+
 // GetInstanceValuesDiff 获取实例当前 values 与 chart 默认 values 的差异
 func (s *InstanceService) GetInstanceValuesDiff(ctx context.Context, clusterID, instanceID string) (*dto.InstanceValuesDiffResponse, error) {
 	principal, err := authz.RequirePrincipal(ctx)

frontend/src/features/artifact/instances/components/InstanceCard.tsx

@@ -229,34 +229,38 @@ export const InstanceCard: React.FC<InstanceCardProps> = ({
       </div>
 
       {/* Action buttons */}
-      <div className="flex items-center gap-1 flex-shrink-0">
+      <div className="flex items-center gap-1.5 flex-shrink-0">
         <button
           onClick={() => onViewEntries(instance)}
-          className="p-1.5 rounded-md text-slate-400 hover:text-blue-500 hover:bg-blue-50 transition-colors"
+          className="flex items-center gap-1 px-2 py-1.5 rounded-md text-slate-500 hover:text-blue-600 hover:bg-blue-50 transition-colors text-xs font-medium"
           title="Entries"
         >
-          <Network className="w-4 h-4" />
+          <Network className="w-3.5 h-3.5" />
+          <span className="hidden sm:inline">Entries</span>
         </button>
         <button
           onClick={() => onViewDiagnostics(instance)}
-          className="p-1.5 rounded-md text-slate-400 hover:text-amber-500 hover:bg-amber-50 transition-colors"
+          className="flex items-center gap-1 px-2 py-1.5 rounded-md text-slate-500 hover:text-amber-600 hover:bg-amber-50 transition-colors text-xs font-medium"
           title="Diagnostics"
         >
-          <Activity className="w-4 h-4" />
+          <Activity className="w-3.5 h-3.5" />
+          <span className="hidden sm:inline">Diag</span>
         </button>
         <button
           onClick={() => onModify(instance)}
-          className="p-1.5 rounded-md text-slate-400 hover:text-indigo-500 hover:bg-indigo-50 transition-colors"
+          className="flex items-center gap-1 px-2 py-1.5 rounded-md text-slate-500 hover:text-indigo-600 hover:bg-indigo-50 transition-colors text-xs font-medium"
           title="Modify"
         >
-          <Settings className="w-4 h-4" />
+          <Settings className="w-3.5 h-3.5" />
+          <span className="hidden sm:inline">Modify</span>
         </button>
         <button
           onClick={() => onTerminate(instance)}
-          className="p-1.5 rounded-md text-slate-400 hover:text-rose-500 hover:bg-rose-50 transition-colors"
+          className="flex items-center gap-1 px-2 py-1.5 rounded-md text-slate-500 hover:text-rose-600 hover:bg-rose-50 transition-colors text-xs font-medium"
           title="Delete"
         >
-          <StopCircle className="w-4 h-4" />
+          <StopCircle className="w-3.5 h-3.5" />
+          <span className="hidden sm:inline">Delete</span>
         </button>
       </div>
     </div>

frontend/src/features/artifact/instances/components/ModifyModal.tsx

@@ -7,7 +7,7 @@ import React, { useState, useEffect } from "react";
 import { Settings } from "lucide-react";
 import { parse as parseYaml, stringify as stringifyYaml } from "yaml";
 import type { InstanceResponse, UpdateInstanceRequest } from "@/api";
-import { getInstanceValuesDiff } from "@/api";
+import { getInstance, getInstanceValuesDiff } from "@/api";
 import {
   Modal,
   Button,
@@ -45,26 +45,29 @@ export const ModifyModal: React.FC<ModifyModalProps> = ({
   } | null>(null);
   const [diffError, setDiffError] = useState<string | null>(null);
 
-  // Initialize with current values
+  // Fetch full instance detail (list excludes values) and load diff
   useEffect(() => {
     setTag(instance.version || "");
     setDescription("");
 
-    // Parse and display existing values as YAML
+    const loadFullInstance = async () => {
-    if (instance.values) {
+      if (instance.clusterId && instance.id) {
         try {
-        const parsedValues = typeof instance.values === 'string'
+          const detail = await getInstance(
-          ? JSON.parse(instance.values)
+            { clusterId: instance.clusterId, instanceId: instance.id },
-          : instance.values;
+          );
-        setValuesYaml(typeof parsedValues === 'object' ? stringifyYaml(parsedValues) : String(parsedValues));
+          // Parse and display existing values as YAML
+          if (detail.values && Object.keys(detail.values).length > 0) {
+            setValuesYaml(stringifyYaml(detail.values));
+          }
         } catch (err) {
-        console.error('[ModifyModal] Failed to parse existing values:', err);
+          console.error('[ModifyModal] Failed to fetch instance detail:', err);
-        setValuesYaml(String(instance.values) || "");
         }
       }
-
-    // Load values diff for reference
       loadValuesDiff();
+    };
+
+    loadFullInstance();
   }, [instance]);
 
   const loadValuesDiff = async () => {