Revert "OZG-6908 remove generic error message from button"

This reverts commit b9567e9c.

alfa-client/libs/design-component/src/lib/button-with-spinner/button-with-spinner.component.spec.ts

 import { ComponentFixture, TestBed } from '@angular/core/testing';
-import { createCommandResource } from 'libs/command-shared/test/command';
+import {
+  createCommandErrorStateResource,
+  createCommandResource,
+} from 'libs/command-shared/test/command';
+import { createApiError } from 'libs/tech-shared/test/error';
 import { ButtonWithSpinnerComponent } from './button-with-spinner.component';
 
 import * as ResourceUtils from 'libs/tech-shared/src/lib/resource/resource.util';
@@ -79,4 +83,30 @@ describe('ButtonWithSpinnerComponent', () => {
       expect(isLoading).toBeTruthy();
     });
   });
+
+  describe('isError', () => {
+    it('should return false if error is not set', () => {
+      component.stateResource.error = null;
+
+      const isError: boolean = component.isError;
+
+      expect(isError).toBeFalsy();
+    });
+
+    it('should return false if error is set and error is ApiError', () => {
+      component.stateResource.error = createApiError();
+
+      const isError: boolean = component.isError;
+
+      expect(isError).toBeFalsy();
+    });
+
+    it('should return true if error is set and error is not ApiError', () => {
+      component.stateResource = createCommandErrorStateResource();
+
+      const isError: boolean = component.isError;
+
+      expect(isError).toBeTruthy();
+    });
+  });
 });

alfa-client/libs/design-component/src/lib/button-with-spinner/button-with-spinner.component.ts

@@ -13,14 +13,21 @@ type ButtonVariants = VariantProps<typeof buttonVariants>;
   standalone: true,
   imports: [CommonModule, ButtonComponent, ErrorMessageComponent],
   styles: [':host {@apply flex flex-col w-fit}'],
-  template: `<ods-button
+  template: ` <ods-error-message
+      *ngIf="isError"
+      text="Ein Fehler ist aufgetreten."
+      subText="Versuchen Sie es noch einmal."
+    >
+    </ods-error-message>
+    <ods-button
       [text]="text"
       [variant]="variant"
       [size]="size"
       [dataTestId]="dataTestId"
       [isLoading]="isLoading"
       (click)="clickEmitter.emit()"
-  />`,
+    >
+    </ods-button>`,
 })
 export class ButtonWithSpinnerComponent implements OnInit {
   @Input() text: string = '';
@@ -44,6 +51,8 @@ export class ButtonWithSpinnerComponent implements OnInit {
   }
 
   get isError(): boolean {
-    return isLoaded(this.stateResource) && hasCommandError(<CommandResource>this.stateResource.resource);
+    return (
+      isLoaded(this.stateResource) && hasCommandError(<CommandResource>this.stateResource.resource)
+    );
   }
 }