feat: add custom file input for images

src/app/components/image-uploader/image-uploader.html

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+@if (imgUrl()) {
+  <div class="image-preview__container">
+    <img [src]="imgUrl()" [alt]="fileName()" width="300" height="300" />
+  </div>
+}
+<input
+  (change)="onFileSelected($event)"
+  #fileUpload
+  accept=".jpeg, .jpg, .png, .webp, .gif"
+  class="file-input"
+  type="file"
+/>
+<div class="file-upload">
+  <div class="file-upload__description" title="{{ fileName() }}">
+    {{ fileName() || 'common.no_file_yet' | translate | upperfirst }}
+  </div>
+  <button matMiniFab color="primary" class="upload-btn" (click)="fileUpload.click()">
+    <mat-icon>attach_file</mat-icon>
+  </button>
+</div>

src/app/components/image-uploader/image-uploader.scss

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+.image-preview {
+  &__container {
+    display: flex;
+    justify-content: center;
+    margin-bottom: 16px;
+  }
+}
+
+.file-input {
+  display: none;
+}
+
+.file-upload {
+  align-items: center;
+  box-sizing: border-box;
+  display: inline-flex;
+  justify-content: space-between;
+  min-width: 196px;
+  width: 100%;
+
+  &__description {
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+}

src/app/components/image-uploader/image-uploader.spec.ts

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+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ImageUploader } from './image-uploader';
+import { provideTranslateService } from '@ngx-translate/core';
+import { By } from '@angular/platform-browser';
+import { FiletypeUtils } from '../../services/filetype-utils';
+
+describe('ImageUploader', () => {
+  let component: ImageUploader;
+  let fixture: ComponentFixture<ImageUploader>;
+
+  let filetypeUtils: Partial<FiletypeUtils>;
+
+  beforeEach(async () => {
+    filetypeUtils = {
+      isValidImageMimeType: vi.fn().mockReturnValue(true)
+    };
+
+    await TestBed.configureTestingModule({
+      imports: [ImageUploader],
+      providers: [provideTranslateService(), { provide: FiletypeUtils, useValue: filetypeUtils }],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(ImageUploader);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+
+  it('should update selection when fileIn input changes', async () => {
+    const file = new File([''], 'test.png', { type: 'image/png' });
+    fixture.componentRef.setInput('fileIn', file);
+    fixture.detectChanges();
+    const descriptionEl = fixture.debugElement.query(By.css('.file-upload__description'));
+    expect((<HTMLDivElement>descriptionEl.nativeElement).textContent.toLowerCase().trim()).toEqual(
+      file.name,
+    );
+  });
+
+  describe('onFileSelected', () => {
+    it('should update and emit selection on valid file', () => {
+      const emitSpy = vi.spyOn(component.file, 'emit');
+      const file = new File([''], 'test.png', { type: 'image/png' });
+      const inputEvent = { target: { files: [file] } } as any;
+      component.onFileSelected(inputEvent);
+      fixture.detectChanges();
+      const descriptionEl = fixture.debugElement.query(By.css('.file-upload__description'));
+      expect(
+        (<HTMLDivElement>descriptionEl.nativeElement).textContent.toLowerCase().trim(),
+      ).toEqual(file.name);
+      expect(emitSpy).toHaveBeenCalledOnce();
+    });
+
+    it('should discard file if not valid type', () => {
+      filetypeUtils.isValidImageMimeType = vi.fn().mockReturnValue(false);
+      const file = new File([''], 'test.txt', { type: 'text/txt' });
+      const inputEvent = { target: { files: [file] } } as any;
+      component.onFileSelected(inputEvent);
+      fixture.detectChanges();
+      const descriptionEl = fixture.debugElement.query(By.css('.file-upload__description'));
+      expect(
+        (<HTMLDivElement>descriptionEl.nativeElement).textContent.toLowerCase().trim(),
+      ).not.toEqual(file.name);
+    });
+  });
+});

src/app/components/image-uploader/image-uploader.ts

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+import { Component, effect, inject, input, output, signal } from '@angular/core';
+import { MatMiniFabButton } from '@angular/material/button';
+import { MatIcon } from '@angular/material/icon';
+import { TranslatePipe } from '@ngx-translate/core';
+import { UpperfirstPipe } from '../../pipes/upperfirst-pipe';
+import { FiletypeUtils } from '../../services/filetype-utils';
+
+@Component({
+  selector: 'app-image-uploader',
+  imports: [MatIcon, MatMiniFabButton, TranslatePipe, UpperfirstPipe],
+  templateUrl: './image-uploader.html',
+  styleUrl: './image-uploader.scss',
+})
+export class ImageUploader {
+  file = output<File>();
+  fileIn = input<File | null>(null);
+  protected readonly fileName = signal('');
+  protected readonly imgUrl = signal('');
+  private readonly filetypeUtils = inject(FiletypeUtils);
+
+  constructor() {
+    effect(() => {
+      if (this.fileIn()) {
+        const file = <File>this.fileIn();
+        this.updateSelection(file);
+      }
+    });
+  }
+
+  onFileSelected(e: Partial<Event>) {
+    const files = (<HTMLInputElement>e.target).files;
+    if (files) {
+      const file = files[0];
+      if (file && this.filetypeUtils.isValidImageMimeType(file.type)) {
+        this.updateSelection(file);
+        this.file.emit(file);
+      }
+    }
+  }
+
+  private updateSelection(file: File) {
+    this.fileName.set(file.name);
+    this.imgUrl.set(URL.createObjectURL(file));
+  }
+}