feat(iot-hub): set rule chain as default rule chain on profile during install

Extend the IoT Hub install dialog so installing a rule chain can also set
it as the Default rule chain on a Device or Asset profile in one step.

The confirm step shows three actions: Cancel, Install (creates the chain
without targeting any profile), and Set for profile (opens a picker step).
The picker step has Cancel, Back, and Install — confirming with a profile
that already has a non-null defaultRuleChainId routes through a
confirm-overwrite step before replacing it. CALCULATED_FIELD keeps its
existing single-button flow unchanged.

Backend:
* RuleChainInstalledItemDescriptor gains a nullable EntityId
  targetProfileId field, persisted in the existing descriptor JSON column
  (no schema migration; @JsonIgnoreProperties(ignoreUnknown=true) handles
  pre-existing rows).
* DefaultIotHubService.installRuleChain() now accepts SecurityUser and
  JsonNode data; a new setAsDefaultRuleChain() helper applies the chain
  as Default rule chain on the selected DEVICE_PROFILE or ASSET_PROFILE
  via the existing tbDeviceProfileService / tbAssetProfileService save
  paths (so the change shows up in the tenant audit log as a normal
  profile update).

Frontend:
* iot-hub-install-dialog.component grows a per-ItemType selectEntityConfig
  map, a 'confirm-overwrite' state, and the methods
  installAsEntityProfileDefault, selectEntityBack, resolveOverwrite,
  confirmOverwriteReplace, confirmOverwriteCancel.
* tb-entity-select gets a 512px min-width above the gt-sm breakpoint so
  the picker renders at a consistent width regardless of the prompt text
  length (mirrors the pattern in recipient-notification-dialog).
* New i18n keys: rule-chain-install-desc, rule-chain-install-as-default,
  select-profile-for-rule-chain, rule-chain-overwrite-title,
  rule-chain-overwrite-body, rule-chain-overwrite-replace.

application/src/main/java/org/thingsboard/server/service/iot_hub/DefaultIotHubService.java

@@ -21,10 +21,12 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 import org.thingsboard.common.util.JacksonUtil;
+import org.thingsboard.server.common.data.asset.AssetProfile;
 import org.thingsboard.server.common.data.Dashboard;
 import org.thingsboard.server.common.data.DeviceProfile;
 import org.thingsboard.server.common.data.cf.CalculatedField;
 import org.thingsboard.server.common.data.exception.ThingsboardException;
+import org.thingsboard.server.common.data.id.AssetProfileId;
 import org.thingsboard.server.common.data.id.DashboardId;
 import org.thingsboard.server.common.data.id.DeviceId;
 import org.thingsboard.server.common.data.id.DeviceProfileId;
@@ -47,6 +49,7 @@ import org.thingsboard.server.common.data.rule.NodeConnectionInfo;
 import org.thingsboard.server.common.data.rule.RuleChainMetaData;
 import org.thingsboard.server.common.data.rule.RuleNode;
 import org.thingsboard.server.common.data.widget.WidgetTypeDetails;
+import org.thingsboard.server.dao.asset.AssetProfileService;
 import org.thingsboard.server.dao.cf.CalculatedFieldService;
 import org.thingsboard.server.dao.dashboard.DashboardService;
 import org.thingsboard.server.dao.device.DeviceProfileService;
@@ -55,6 +58,7 @@ import org.thingsboard.server.dao.iot_hub.IotHubInstalledItemService;
 import org.thingsboard.server.dao.rule.RuleChainService;
 import org.thingsboard.server.dao.widget.WidgetTypeService;
 import org.thingsboard.server.queue.util.TbCoreComponent;
+import org.thingsboard.server.service.entitiy.asset.profile.TbAssetProfileService;
 import org.thingsboard.server.service.entitiy.cf.TbCalculatedFieldService;
 import org.thingsboard.server.service.entitiy.dashboard.TbDashboardService;
 import org.thingsboard.server.service.entitiy.device.TbDeviceService;
@@ -84,6 +88,8 @@ public class DefaultIotHubService implements IotHubService {
     private final RuleChainService ruleChainService;
     private final TbRuleChainService tbRuleChainService;
     private final TbDeviceProfileService tbDeviceProfileService;
+    private final AssetProfileService assetProfileService;
+    private final TbAssetProfileService tbAssetProfileService;
     private final IotHubInstalledItemService iotHubInstalledItemService;
     private final WidgetTypeService widgetTypeService;
     private final DashboardService dashboardService;
@@ -115,7 +121,7 @@ public class DefaultIotHubService implements IotHubService {
                 case "CALCULATED_FIELD" -> installCalculatedField(user, tenantId, fileData, data);
                 case "ALARM_RULE" -> throw new IllegalArgumentException(
                         "Alarm Rules require ThingsBoard 4.3 or later. Please update your platform instance to install Alarm Rule packages.");
-                case "RULE_CHAIN" -> installRuleChain(tenantId, fileData);
+                case "RULE_CHAIN" -> installRuleChain(user, tenantId, fileData, data);
                 case "DEVICE" -> installDeviceProfile(user, tenantId, fileData);
                 case "SOLUTION_TEMPLATE" -> installSolution(user, tenantId, fileData, request);
                 default -> throw new IllegalArgumentException("Unsupported IoT Hub item type: " + itemType);
@@ -194,7 +200,8 @@ public class DefaultIotHubService implements IotHubService {
         return descriptor;
     }
 
-    private RuleChainInstalledItemDescriptor installRuleChain(TenantId tenantId, byte[] fileData) throws Exception {
+    private RuleChainInstalledItemDescriptor installRuleChain(
+            SecurityUser user, TenantId tenantId, byte[] fileData, JsonNode data) throws Exception {
         JsonNode json = JacksonUtil.toJsonNode(new String(fileData));
 
         RuleChain ruleChain;
@@ -220,11 +227,52 @@ public class DefaultIotHubService implements IotHubService {
         ruleChainService.saveRuleChainMetaData(tenantId, metadata, tbRuleChainService::updateRuleNodeConfiguration);
 
         log.debug("[{}] Rule chain installed: {}", tenantId, savedRuleChain.getName());
+
         RuleChainInstalledItemDescriptor descriptor = new RuleChainInstalledItemDescriptor();
         descriptor.setRuleChainId(savedRuleChain.getId());
+
+        if (data != null && data.has("entityId") && !data.get("entityId").isNull()) {
+            EntityId entityId = JacksonUtil.treeToValue(data.get("entityId"), EntityId.class);
+            setAsDefaultRuleChain(user, tenantId, entityId, savedRuleChain.getId());
+            descriptor.setTargetProfileId(entityId);
+        }
+
         return descriptor;
     }
 
+    private void setAsDefaultRuleChain(SecurityUser user, TenantId tenantId,
+                                       EntityId entityId, RuleChainId ruleChainId) throws Exception {
+        switch (entityId.getEntityType()) {
+            case DEVICE_PROFILE -> {
+                DeviceProfile profile = deviceProfileService.findDeviceProfileById(
+                        tenantId, (DeviceProfileId) entityId);
+                if (profile == null) {
+                    throw new IllegalArgumentException(
+                            "Device profile not found: " + entityId.getId());
+                }
+                profile.setDefaultRuleChainId(ruleChainId);
+                tbDeviceProfileService.save(profile, user);
+                log.debug("[{}] Set rule chain {} as default on device profile {}",
+                        tenantId, ruleChainId.getId(), entityId.getId());
+            }
+            case ASSET_PROFILE -> {
+                AssetProfile profile = assetProfileService.findAssetProfileById(
+                        tenantId, (AssetProfileId) entityId);
+                if (profile == null) {
+                    throw new IllegalArgumentException(
+                            "Asset profile not found: " + entityId.getId());
+                }
+                profile.setDefaultRuleChainId(ruleChainId);
+                tbAssetProfileService.save(profile, user);
+                log.debug("[{}] Set rule chain {} as default on asset profile {}",
+                        tenantId, ruleChainId.getId(), entityId.getId());
+            }
+            default -> throw new IllegalArgumentException(
+                    "Rule chain can only be set as default on device or asset profile, got: "
+                            + entityId.getEntityType());
+        }
+    }
+
     private DeviceInstalledItemDescriptor installDeviceProfile(SecurityUser user, TenantId tenantId, byte[] fileData) throws Exception {
         DeviceProfile deviceProfile;
         try {

common/data/src/main/java/org/thingsboard/server/common/data/iot_hub/RuleChainInstalledItemDescriptor.java

@@ -16,11 +16,13 @@
 package org.thingsboard.server.common.data.iot_hub;
 
 import lombok.Data;
+import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.RuleChainId;
 
 @Data
 public class RuleChainInstalledItemDescriptor implements IotHubInstalledItemDescriptor {
 
     private RuleChainId ruleChainId;
+    private EntityId targetProfileId;
 
 }

ui-ngx/src/app/modules/home/components/iot-hub/iot-hub-install-dialog.component.html

@@ -19,20 +19,35 @@
   @switch (state) {
     @case ('confirm') {
       <h2 class="tb-iot-hub-install-title">{{ 'iot-hub.install-confirm-title' | translate:{ name: item.name } }}</h2>
-      <p class="tb-iot-hub-install-desc">{{ 'iot-hub.install-desc' | translate }}</p>
+      @if (item.type === ItemType.RULE_CHAIN) {
+        <p class="tb-iot-hub-install-desc">{{ 'iot-hub.rule-chain-install-desc' | translate }}</p>
+      } @else {
+        <p class="tb-iot-hub-install-desc">{{ 'iot-hub.install-desc' | translate }}</p>
+      }
     }
     @case ('select-entity') {
       <h2 class="tb-iot-hub-install-title">{{ 'iot-hub.install-confirm-title' | translate:{ name: item.name } }}</h2>
-      <p class="tb-iot-hub-install-desc">{{ 'iot-hub.select-entity-for-cf' | translate:{ name: item.name } }}</p>
+      @if (activeSelectEntityConfig?.promptKey) {
+        <p class="tb-iot-hub-install-desc"
+           [innerHTML]="activeSelectEntityConfig.promptKey | translate:{ name: item.name }"></p>
+      }
       <tb-entity-select
         [(ngModel)]="selectedEntityId"
-        [allowedEntityTypes]="cfEntityTypes"
+        [allowedEntityTypes]="activeSelectEntityConfig.allowed"
-        [defaultEntityType]="defaultCfEntityType"
+        [defaultEntityType]="activeSelectEntityConfig.defaultType"
         [filterAllowedEntityTypes]="false"
         appearance="outline"
-        required>
+        [required]="activeSelectEntityConfig.required">
       </tb-entity-select>
     }
+    @case ('confirm-overwrite') {
+      <h2 class="tb-iot-hub-install-title">{{ 'iot-hub.rule-chain-overwrite-title' | translate }}</h2>
+      <p class="tb-iot-hub-install-desc"
+         [innerHTML]="'iot-hub.rule-chain-overwrite-body' | translate:{
+            profile: pendingOverwrite?.profileName,
+            existing: pendingOverwrite?.existingRuleChainName
+         }"></p>
+    }
     @case ('installing') {
       <h2 class="tb-iot-hub-install-title">{{ 'iot-hub.install-confirm-title' | translate:{ name: item.name } }}</h2>
       <p class="tb-iot-hub-install-desc">{{ 'iot-hub.install-desc' | translate }}</p>
@@ -58,11 +73,37 @@
   @switch (state) {
     @case ('confirm') {
       <button mat-button (click)="cancel()">{{ 'action.cancel' | translate }}</button>
-      <button mat-flat-button color="primary" (click)="install()">{{ 'iot-hub.install' | translate }}</button>
+      @if (item.type === ItemType.RULE_CHAIN) {
+        <button mat-stroked-button (click)="install()">{{ 'iot-hub.install' | translate }}</button>
+        <button mat-flat-button color="primary" (click)="installAsEntityProfileDefault()">
+          {{ 'iot-hub.rule-chain-install-as-default' | translate }}
+        </button>
+      } @else {
+        <button mat-flat-button color="primary" (click)="install()">{{ 'iot-hub.install' | translate }}</button>
+      }
     }
     @case ('select-entity') {
       <button mat-button (click)="cancel()">{{ 'action.cancel' | translate }}</button>
-      <button mat-flat-button color="primary" [disabled]="!selectedEntityId" (click)="doInstall()">{{ 'iot-hub.install' | translate }}</button>
+      @if (item.type === ItemType.RULE_CHAIN) {
+        <button mat-button (click)="selectEntityBack()">{{ 'action.back' | translate }}</button>
+        <button mat-flat-button color="primary"
+                [disabled]="!selectedEntityId"
+                (click)="onSelectEntityInstall()">
+          {{ 'iot-hub.install' | translate }}
+        </button>
+      } @else {
+        <button mat-flat-button color="primary"
+                [disabled]="activeSelectEntityConfig?.required && !selectedEntityId"
+                (click)="onSelectEntityInstall()">
+          {{ 'iot-hub.install' | translate }}
+        </button>
+      }
+    }
+    @case ('confirm-overwrite') {
+      <button mat-button (click)="confirmOverwriteCancel()">{{ 'action.cancel' | translate }}</button>
+      <button mat-flat-button color="primary" (click)="confirmOverwriteReplace()">
+        {{ 'iot-hub.rule-chain-overwrite-replace' | translate }}
+      </button>
     }
     @case ('installing') {
       <button mat-button disabled>{{ 'action.cancel' | translate }}</button>

ui-ngx/src/app/modules/home/components/iot-hub/iot-hub-install-dialog.component.scss

@@ -14,6 +14,14 @@
  * limitations under the License.
  */
 
+@import "../../../../../scss/constants";
+
+tb-entity-select {
+  @media #{$mat-gt-sm} {
+    min-width: 512px;
+  }
+}
+
 .tb-iot-hub-install-title {
   font-size: 20px;
   font-weight: 600;

ui-ngx/src/app/modules/home/components/iot-hub/iot-hub-install-dialog.component.ts

@@ -29,12 +29,37 @@ import { EntityType } from '@shared/models/entity-type.models';
 import { EntityId } from '@shared/models/id/entity-id';
 import { resolveEntityDetailsUrl } from './iot-hub-components.models';
 import { SolutionInstallDialogComponent } from '@home/components/iot-hub/solution-install-dialog.component';
+import { Observable, of } from 'rxjs';
+import { map, switchMap } from 'rxjs/operators';
+import { DeviceProfileService } from '@core/http/device-profile.service';
+import { AssetProfileService } from '@core/http/asset-profile.service';
+import { RuleChainService } from '@core/http/rule-chain.service';
+import { RuleChainId } from '@shared/models/id/rule-chain-id';
+
+interface SelectEntityConfig {
+  allowed: EntityType[];
+  defaultType: EntityType;
+  required: boolean;
+  promptKey?: string;
+}
+
+interface PendingOverwrite {
+  entityId: EntityId;
+  profileName: string;
+  existingRuleChainName: string;
+}
 
 export interface IotHubInstallDialogData {
   item: MpItemVersionView;
 }
 
-export type InstallState = 'select-entity' | 'confirm' | 'installing' | 'success' | 'error';
+export type InstallState =
+  | 'select-entity'
+  | 'confirm-overwrite'
+  | 'confirm'
+  | 'installing'
+  | 'success'
+  | 'error';
 
 @Component({
   selector: 'tb-iot-hub-install-dialog',
@@ -53,8 +78,26 @@ export class TbIotHubInstallDialogComponent extends DialogComponent<TbIotHubInst
   entityDetailsUrl: string | null = null;
 
   selectedEntityId: EntityId | null = null;
-  cfEntityTypes: EntityType[] = [EntityType.DEVICE, EntityType.ASSET, EntityType.DEVICE_PROFILE, EntityType.ASSET_PROFILE];
+  pendingOverwrite: PendingOverwrite | null = null;
-  defaultCfEntityType = EntityType.DEVICE_PROFILE;
+
+  private readonly selectEntityConfig: Partial<Record<ItemType, SelectEntityConfig>> = {
+    [ItemType.CALCULATED_FIELD]: {
+      allowed: [EntityType.DEVICE, EntityType.ASSET, EntityType.DEVICE_PROFILE, EntityType.ASSET_PROFILE],
+      defaultType: EntityType.DEVICE_PROFILE,
+      required: true,
+      promptKey: 'iot-hub.select-entity-for-cf',
+    },
+    [ItemType.RULE_CHAIN]: {
+      allowed: [EntityType.DEVICE_PROFILE, EntityType.ASSET_PROFILE],
+      defaultType: EntityType.DEVICE_PROFILE,
+      required: true,
+      promptKey: 'iot-hub.select-profile-for-rule-chain',
+    },
+  };
+
+  get activeSelectEntityConfig(): SelectEntityConfig | null {
+    return this.selectEntityConfig[this.item.type] ?? null;
+  }
 
   constructor(
     protected store: Store<AppState>,
@@ -63,7 +106,10 @@ export class TbIotHubInstallDialogComponent extends DialogComponent<TbIotHubInst
     @Inject(MAT_DIALOG_DATA) public data: IotHubInstallDialogData,
     private dialog: MatDialog,
     private translate: TranslateService,
-    private iotHubApiService: IotHubApiService
+    private iotHubApiService: IotHubApiService,
+    private deviceProfileService: DeviceProfileService,
+    private assetProfileService: AssetProfileService,
+    private ruleChainService: RuleChainService
   ) {
     super(store, router, dialogRef);
     this.item = data.item;
@@ -82,6 +128,76 @@ export class TbIotHubInstallDialogComponent extends DialogComponent<TbIotHubInst
     this.doInstall();
   }
 
+  installAsEntityProfileDefault(): void {
+    this.state = 'select-entity';
+  }
+
+  selectEntityBack(): void {
+    this.selectedEntityId = null;
+    this.state = 'confirm';
+  }
+
+  onSelectEntityInstall(): void {
+    if (!this.selectedEntityId) {
+      return;
+    }
+    if (this.item.type !== ItemType.RULE_CHAIN) {
+      this.doInstall();
+      return;
+    }
+    this.resolveOverwrite(this.selectedEntityId).subscribe({
+      next: (pending) => {
+        if (pending) {
+          this.pendingOverwrite = pending;
+          this.state = 'confirm-overwrite';
+        } else {
+          this.pendingOverwrite = null;
+          this.doInstall();
+        }
+      },
+      error: (err) => {
+        this.state = 'error';
+        this.errorMessage = err?.error?.message || err?.message ||
+          this.translate.instant('iot-hub.install-error', { name: this.item.name });
+      }
+    });
+  }
+
+  confirmOverwriteReplace(): void {
+    this.doInstall();
+  }
+
+  confirmOverwriteCancel(): void {
+    this.pendingOverwrite = null;
+    this.state = 'select-entity';
+  }
+
+  private resolveOverwrite(profileEntityId: EntityId): Observable<PendingOverwrite | null> {
+    const lookupProfile$: Observable<{ name: string; defaultRuleChainId: RuleChainId | null }> =
+      profileEntityId.entityType === EntityType.DEVICE_PROFILE
+        ? this.deviceProfileService.getDeviceProfile(profileEntityId.id, { ignoreLoading: true }).pipe(
+            map(p => ({ name: p.name, defaultRuleChainId: p.defaultRuleChainId ?? null }))
+          )
+        : this.assetProfileService.getAssetProfile(profileEntityId.id, { ignoreLoading: true }).pipe(
+            map(p => ({ name: p.name, defaultRuleChainId: p.defaultRuleChainId ?? null }))
+          );
+
+    return lookupProfile$.pipe(
+      switchMap(profile => {
+        if (!profile.defaultRuleChainId) {
+          return of<PendingOverwrite | null>(null);
+        }
+        return this.ruleChainService.getRuleChain(profile.defaultRuleChainId.id, { ignoreLoading: true }).pipe(
+          map(existing => ({
+            entityId: profileEntityId,
+            profileName: profile.name,
+            existingRuleChainName: existing.name,
+          }))
+        );
+      })
+    );
+  }
+
   doInstall(): void {
     this.state = 'installing';
     const versionId = this.item.id as string;

ui-ngx/src/assets/locale/locale.constant-en_US.json

@@ -3811,6 +3811,12 @@
         "remove-desc-solution-template": "Removing this solution template will also remove all created entities including dashboards, rule chains, devices, and other associated resources within your tenant",
         "remove-anyway": "Remove anyway",
         "select-entity-for-cf": "Select entity for calculated field '{{name}}'",
+        "rule-chain-install-desc": "Installing this will automatically create the rule chain within your tenant. Use 'Set for profile' to also set it as default for Device or Asset profile.",
+        "rule-chain-install-as-default": "Set for profile",
+        "select-profile-for-rule-chain": "Select profile for rule chain '{{name}}'",
+        "rule-chain-overwrite-title": "Replace existing default rule chain?",
+        "rule-chain-overwrite-body": "Profile <b>{{profile}}</b> currently uses <b>{{existing}}</b> as its default rule chain. Installing will replace it with this rule chain.",
+        "rule-chain-overwrite-replace": "Replace",
         "install": "Install",
         "connect": "Connect",
         "connect-device": "Connect device",