chore[1300]: added back Button

CHANGELOG.md

@@ -10,6 +10,7 @@ _**For better traceability add the corresponding GitHub issue number in each cha
 
 ### Added
 - #908 Add owner field to affected parts view in notification details
+- #1300 Added back button
 
 ### Changed
 - #1252 adapt IRS example response for integration tests to reflect current state

frontend/src/app/modules/shared/modules/relations/presentation/part-relation.component.html

@@ -19,6 +19,19 @@
 SPDX-License-Identifier: Apache-2.0
 -->
 
+<div class="part-relation--header--navigation--container">
+  <app-button
+    [color]="'primary'"
+    onkeydown="this.navigateBack()"
+    (click)="this.navigateBack()"
+  >
+    <div class="flex justify-between items-center">
+      <mat-icon class="mr-2">arrow_back</mat-icon>
+      {{ 'actions.goBack' | i18n }}
+    </div>
+  </app-button>
+</div>
+
 <ng-container *ngIf="this.rootPart$">
   <ng-container *viewContainer="this.rootPart$ | async; main: partRelationMainTmp; error: errorTmp; loading: loaderTmp">
   </ng-container>

frontend/src/app/modules/shared/modules/relations/presentation/part-relation.component.ts

@@ -19,6 +19,7 @@
  * SPDX-License-Identifier: Apache-2.0
  ********************************************************************************/
 
+import { Location } from '@angular/common';
 import {
   ChangeDetectionStrategy,
   ChangeDetectorRef,
@@ -28,7 +29,7 @@ import {
   OnInit,
   ViewEncapsulation,
 } from '@angular/core';
-import { ActivatedRoute } from '@angular/router';
+import { ActivatedRoute, Router } from '@angular/router';
 import { Part } from '@page/parts/model/parts.model';
 import { State } from '@shared/model/state';
 import { View } from '@shared/model/view.model';
@@ -57,14 +58,14 @@ export class PartRelationComponent implements OnInit, OnDestroy {
   public readonly rootPart$: Observable<View<Part>>;
   public readonly resizeTrigger$: Observable<number>;
   public readonly htmlId: string;
-
   private _rootPart$ = new State<View<Part>>({ loader: true });
   public readonly _resizeTrigger$ = new BehaviorSubject<number>(0);
 
   constructor(
     private readonly partDetailsFacade: PartDetailsFacade,
     private readonly route: ActivatedRoute,
     private readonly cdr: ChangeDetectorRef,
+    private readonly location: Location,
     staticIdService: StaticIdService,
   ) {
     this.resizeTrigger$ = this._resizeTrigger$.pipe(delay(0));
@@ -99,4 +100,8 @@ export class PartRelationComponent implements OnInit, OnDestroy {
   public decreaseSize(): void {
     this._resizeTrigger$.next(-0.1);
   }
+
+  navigateBack() {
+    this.location.back();
+  }
 }