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

@@ -139,6 +139,9 @@ func (h *InstanceHandler) ListInstances(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
+	// Enrich with running replicas from K8s
+	instances = h.instanceService.EnrichReplicas(r.Context(), clusterID, instances)
+
 	responses := make([]*dto.InstanceResponse, 0, len(instances))
 	for _, instance := range instances {
 		responses = append(responses, convertInstanceResponse(instance, false))
@@ -586,7 +589,7 @@ func convertInstanceResponse(instance *entity.Instance, includeValues bool) *dto
 		LastOperation:  string(instance.LastOperation),
 		LastError:      instance.LastError,
 		Revision:       instance.Revision,
-		Replicas:       0,
+		Replicas:       instance.Replicas,
 		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/domain/entity/instance.go

@@ -53,6 +53,7 @@ type Instance struct {
 	Revision      int // Helm Release Revision
 	CreatedAt     time.Time
 	UpdatedAt     time.Time
+	Replicas      int // Running K8s replicas (enriched, not persisted)
 }
 
 // NewInstance 创建新实例

backend/internal/domain/service/instance_service.go

@@ -473,6 +473,24 @@ func (s *InstanceService) ScaleInstance(ctx context.Context, clusterID, instance
 	return instance, nil
 }
 
+// EnrichReplicas 批量获取实例的 K8s 实际副本数并设置到 entity 上
+func (s *InstanceService) EnrichReplicas(ctx context.Context, clusterID string, instances []*entity.Instance) []*entity.Instance {
+	if s.scaleClient == nil || len(instances) == 0 {
+		return instances
+	}
+	cluster, err := s.clusterRepo.GetByID(ctx, clusterID)
+	if err != nil {
+		return instances
+	}
+	for _, inst := range instances {
+		r, err := s.scaleClient.GetDeploymentReplicas(ctx, cluster, inst.Namespace, inst.Name)
+		if err == nil {
+			inst.Replicas = int(r)
+		}
+	}
+	return instances
+}
+
 // 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 {

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

@@ -40,37 +40,47 @@ export const ModifyModal: React.FC<ModifyModalProps> = ({
 
   // Values Diff support
   const [showDiff, setShowDiff] = useState(false);
-  const [loadingDiff, setLoadingDiff] = useState(false);
+  const [loadingDiff] = useState(false);
   const [diffData, setDiffData] = useState<{
     current: Record<string, any>;
     defaults: Record<string, any>;
   } | null>(null);
-  const [diffError, setDiffError] = useState<string | null>(null);
+  const [diffError] = useState<string | null>(null);
 
-  // Fetch full instance detail (list excludes values) and load diff
+  // Fetch full Helm values (via values-diff API) and instance detail
   useEffect(() => {
     setTag(instance.version || "");
     setDescription("");
 
-    const loadFullInstance = async () => {
+    const loadData = async () => {
       if (instance.clusterId && instance.id) {
+        // Load values diff first — gives us the full current Helm values
         try {
-          const detail = await getInstance(
-            { clusterId: instance.clusterId, instanceId: instance.id },
-          );
-          if (detail.values && Object.keys(detail.values).length > 0) {
-            const currentYaml = stringifyYaml(detail.values, { lineWidth: 0 });
+          const data = await getInstanceValuesDiff(instance.clusterId, instance.id);
+          if (data?.current && Object.keys(data.current).length > 0) {
+            const currentYaml = stringifyYaml(data.current, { lineWidth: 0 });
             setValuesYaml(currentYaml);
             setOriginalValuesYaml(currentYaml);
+            setDiffData({ current: data.current, defaults: data.defaults ?? {} });
           }
         } catch (err) {
-          console.error('[ModifyModal] Failed to fetch instance detail:', err);
+          console.error('[ModifyModal] Failed to load values diff:', err);
+          // Fallback: try instance detail
+          try {
+            const detail = await getInstance({ clusterId: instance.clusterId, instanceId: instance.id });
+            if (detail.values && Object.keys(detail.values).length > 0) {
+              const y = stringifyYaml(detail.values, { lineWidth: 0 });
+              setValuesYaml(y);
+              setOriginalValuesYaml(y);
+            }
+          } catch (err2) {
+            console.error('[ModifyModal] Failed to load instance detail:', err2);
+          }
         }
       }
-      loadValuesDiff();
     };
 
-    loadFullInstance();
+    loadData();
   }, [instance]);
 
   // Recompute modified keys when valuesYaml or diffData changes
@@ -98,24 +108,6 @@ export const ModifyModal: React.FC<ModifyModalProps> = ({
     } catch { /* ignore parse errors */ }
   }, [valuesYaml, diffData]);
 
-  const loadValuesDiff = async () => {
-    if (!instance.clusterId || !instance.id) return;
-
-    setLoadingDiff(true);
-    setDiffError(null);
-    setDiffData(null);
-    try {
-      const data = await getInstanceValuesDiff(instance.clusterId, instance.id);
-      if (data && data.current && data.defaults) {
-        setDiffData({ current: data.current, defaults: data.defaults });
-      }
-    } catch (err) {
-      console.error("[ModifyModal] Failed to load values diff:", err);
-      setDiffError("Failed to load values diff");
-    } finally {
-      setLoadingDiff(false);
-    }
-  };
 
   const applyDefaults = () => {
     if (!diffData?.defaults) return;
@@ -303,9 +295,6 @@ export const ModifyModal: React.FC<ModifyModalProps> = ({
             <button
               type="button"
               onClick={() => {
-                if (!showDiff && !diffData) {
-                  loadValuesDiff();
-                }
                 setShowDiff(!showDiff);
               }}
               className="flex items-center gap-2 text-sm font-medium text-indigo-600 hover:text-indigo-700 transition-colors"