feat(qr-modal): implement QR modal component and integrate with tickets page

src/app/shared/components/qr-modal/qr-modal.component.html

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+<article class="qr-modal">
+  <header class="qr-modal__header">
+    <p class="qr-modal__id">ID: {{ data.id }}</p>
+    @if (data.date) {
+      <time class="qr-modal__date">{{ data.date }}</time>
+    }
+  </header>
+
+  <qrcode
+    class="qr-modal__code"
+    [qrdata]="data.ticket"
+    [width]="320"
+    errorCorrectionLevel="M"
+    [ariaLabel]="'Código QR del ticket ' + data.id"
+  />
+</article>

src/app/shared/components/qr-modal/qr-modal.component.scss

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+.qr-modal {
+  display: grid;
+  justify-items: center;
+  gap: 0.65rem;
+  width: 100%;
+  text-align: center;
+}
+
+.qr-modal__header {
+  display: grid;
+  justify-items: center;
+  gap: 0.25rem;
+}
+
+.qr-modal__id {
+  margin: 0;
+}
+
+.qr-modal__id {
+  color: #4f4f4f;
+  font-size: 0.68rem;
+  line-height: 1.2;
+}
+
+.qr-modal__date {
+  margin-top: 0.35rem;
+  color: #8a8a8a;
+  font-size: 0.62rem;
+  line-height: 1.2;
+}
+
+.qr-modal__code {
+  display: block;
+  width: 100%;
+  max-width: 11rem;
+  overflow: hidden;
+  background: #ffffff;
+}
+
+:host ::ng-deep .qr-modal__code canvas {
+  display: block;
+  width: 100% !important;
+  height: auto !important;
+}

src/app/shared/components/qr-modal/qr-modal.component.ts

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+import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
+
+import { MODAL_DATA, QrModalData } from '../../../core/services/modal.service';
+import { QRCodeComponent } from '../qrcode/qrcode.component';
+
+@Component({
+  selector: 'app-qr-modal',
+  imports: [QRCodeComponent],
+  templateUrl: './qr-modal.component.html',
+  styleUrl: './qr-modal.component.scss',
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class QrModalComponent {
+  protected readonly data = inject<QrModalData>(MODAL_DATA);
+}