auth-service/src/app/app.html

<main class="page">
  <section class="login-card">
    <div class="login-icon">
      <svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5">
        <path d="M21 11.5a8.38 8.38 0 0 1-.9 3.8 8.5 8.5 0 0 1-7.6 4.7 8.38 8.38 0 0 1-3.8-.9L3 21l1.9-5.7a8.38 8.38 0 0 1-.9-3.8 8.5 8.5 0 0 1 4.7-7.6 8.38 8.38 0 0 1 3.8-.9h.5a8.48 8.48 0 0 1 8 8v.5z"></path>
      </svg>
    </div>

    @if (session(); as currentSession) {
      <h1>Authenticated</h1>
      <p class="status-copy">{{ statusMessage() }}</p>

      <div class="session-card">
        <strong>{{ currentSession.displayName }}</strong>
        <span>
          @if (currentSession.username) {
            @{{ currentSession.username }}
          } @else {
            Telegram user {{ currentSession.telegramUserId }}
          }
        </span>
        <span>Session {{ currentSession.sessionId }}</span>
        <span>Expires {{ currentSession.expiresAt | date: 'medium' }}</span>
      </div>
    } @else {
      <h1>Continue With Telegram</h1>
      <p class="status-copy">{{ statusMessage() }}</p>

      <button class="telegram-btn" type="button" (click)="openTelegram()" [disabled]="!telegramUrl() && state() === 'loading'">
        <svg class="tg-icon" width="22" height="22" viewBox="0 0 24 24" fill="currentColor">
          <path d="M11.944 0A12 12 0 0 0 0 12a12 12 0 0 0 12 12 12 12 0 0 0 12-12A12 12 0 0 0 12 0a12 12 0 0 0-.056 0zm4.962 7.224c.1-.002.321.023.465.14a.506.506 0 0 1 .171.325c.016.093.036.306.02.472-.18 1.898-.962 6.502-1.36 8.627-.168.9-.499 1.201-.82 1.23-.696.065-1.225-.46-1.9-.902-1.056-.693-1.653-1.124-2.678-1.8-1.185-.78-.417-1.21.258-1.91.177-.184 3.247-2.977 3.307-3.23.007-.032.014-.15-.056-.212s-.174-.041-.249-.024c-.106.024-1.793 1.14-5.061 3.345-.48.33-.913.49-1.302.48-.428-.008-1.252-.241-1.865-.44-.752-.245-1.349-.374-1.297-.789.027-.216.325-.437.893-.663 3.498-1.524 5.83-2.529 6.998-3.014 3.332-1.386 4.025-1.627 4.476-1.635z"></path>
        </svg>
        Open Telegram
      </button>

      <div class="qr-section">
        @if (state() === 'loading') {
          <div class="qr-container qr-loading" aria-live="polite">
            <div class="spinner"></div>
          </div>
        } @else if (state() === 'expired' || state() === 'error') {
          <button class="qr-container qr-expired" type="button" (click)="refreshQr()" aria-label="Refresh QR code">
            <svg width="32" height="32" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
              <path d="M1 4v6h6M23 20v-6h-6"></path>
              <path d="M20.49 9A9 9 0 0 0 5.64 5.64L1 10m22 4l-4.64 4.36A9 9 0 0 1 3.51 15"></path>
            </svg>
            <span>Refresh QR code</span>
          </button>
        } @else if (qrImageUrl()) {
          <div class="qr-container qr-ready">
            <img [src]="qrImageUrl()" alt="Telegram login QR code" width="220" height="220" loading="eager" />
          </div>
        }
      </div>

      <button class="secondary-btn" type="button" (click)="refreshQr()">Generate new QR</button>
    }
  </section>
</main>