fix(iot-hub): suppress global error toast and add Back button on provisioning error

- Add ignoreErrors: true to all entity creation API calls so errors
  are only shown in the dialog, not as global toast notifications
- Add Back button on provisioning error to navigate back to the last
  form step, allowing users to fix parameters (e.g. device name)
- Make form steps editable so stepper allows backward navigation
- Reset progress step state when going back so it re-runs with
  updated form values

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

@@ -67,7 +67,7 @@
         </ng-template>
 
         @for (ws of wizardSteps; track ws.label; let i = $index; let last = $last) {
-          <mat-step [editable]="false"
+          <mat-step [editable]="ws.type === 'form'"
                     [completed]="ws.completed"
                     [stepControl]="ws.type === 'form' ? ws.formGroup : null">
             <ng-template matStepLabel>{{ ws.label }}</ng-template>
@@ -216,6 +216,7 @@
           @case ('progress') {
             @if (step.progressError) {
               <button mat-button (click)="cancel()">{{ 'action.cancel' | translate }}</button>
+              <button mat-button (click)="goBackToForm()">{{ 'action.back' | translate }}</button>
               <button mat-flat-button color="primary" (click)="retryEntitySteps(step)">
                 {{ 'action.retry' | translate }}
               </button>

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

@@ -191,6 +191,27 @@ export class TbDeviceInstallDialogComponent implements OnInit {
     this.runEntitySteps(step);
   }
 
+  goBackToForm(): void {
+    // Find the last form step before the current progress step
+    const currentIdx = this.stepper.selectedIndex;
+    for (let i = currentIdx - 1; i >= 0; i--) {
+      if (this.wizardSteps[i].type === 'form') {
+        // Reset the progress step so it re-runs when we come back
+        const progressStep = this.wizardSteps[currentIdx];
+        progressStep.entitySteps = null;
+        progressStep.progressError = null;
+        progressStep.progressDone = false;
+        progressStep.completed = false;
+        // Allow navigation back by making intermediate steps editable
+        for (let j = i; j < currentIdx; j++) {
+          this.wizardSteps[j].completed = false;
+        }
+        this.stepper.selectedIndex = i;
+        return;
+      }
+    }
+  }
+
   getPatternErrorMessage(field: FormFieldDefinition): string {
     return field.validators?.[0]?.message || 'Invalid format';
   }
@@ -411,16 +432,16 @@ export class TbDeviceInstallDialogComponent implements OnInit {
         if (existing) {
           return existing;
         }
-        const result = await firstValueFrom(this.deviceProfileService.saveDeviceProfile(template));
+        const result = await firstValueFrom(this.deviceProfileService.saveDeviceProfile(template, {ignoreErrors: true}));
         return { id: result.id.id, name: result.name };
       }
       case InstallStepType.DEVICE: {
-        const result = await firstValueFrom(this.deviceService.saveDevice(template));
-        const creds = await firstValueFrom(this.deviceService.getDeviceCredentials(result.id.id));
+        const result = await firstValueFrom(this.deviceService.saveDevice(template, {ignoreErrors: true}));
+        const creds = await firstValueFrom(this.deviceService.getDeviceCredentials(result.id.id, false, {ignoreErrors: true}));
         return { id: result.id.id, name: result.name, token: creds.credentialsId };
       }
       case InstallStepType.DASHBOARD: {
-        const result = await firstValueFrom(this.dashboardService.saveDashboard(template));
+        const result = await firstValueFrom(this.dashboardService.saveDashboard(template, {ignoreErrors: true}));
         return { id: result.id.id, name: result.title };
       }
       case InstallStepType.RULE_CHAIN: {
@@ -430,10 +451,10 @@ export class TbDeviceInstallDialogComponent implements OnInit {
         if (existing) {
           return existing;
         }
-        const saved = await firstValueFrom(this.ruleChainService.saveRuleChain(ruleChain));
+        const saved = await firstValueFrom(this.ruleChainService.saveRuleChain(ruleChain, {ignoreErrors: true}));
         if (metadata) {
           metadata.ruleChainId = saved.id;
-          await firstValueFrom(this.ruleChainService.saveRuleChainMetadata(metadata));
+          await firstValueFrom(this.ruleChainService.saveRuleChainMetadata(metadata, {ignoreErrors: true}));
         }
         return { id: saved.id.id, name: saved.name };
       }