src/templates/includes/partials/pwa_prompt.html

<script>
  // PWA Install Injector
(function() {
    'use strict';
    const performInjection = () => {
        let deferredPrompt = null;
        const lastDismissed = localStorage.getItem('pwa_dismissed_at');
        const cooldown = 3 * 24 * 60 * 60 * 1000; 
        const isStandalone = window.matchMedia('(display-mode: standalone)').matches;

        const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) || 
                      (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1);

        if (isStandalone || (lastDismissed && (Date.now() - lastDismissed < cooldown))) {
            return; 
        }

        window.addEventListener('beforeinstallprompt', (e) => {
            e.preventDefault();
            deferredPrompt = e;
            setTimeout(injectPwaResources, 2000);
        });

        if (isIOS) {
            setTimeout(injectPwaResources, 2000);
        }

        /**
         * Injects CSS and HTML UI components into the DOM
         */
        function injectPwaResources() {
            if (document.getElementById('pwa-mini-banner')) return;

            const style = document.createElement('style');
            style.id = 'pwa-dynamic-styles';
            style.textContent = `
                .pwa-sticky-bar {
                    position: fixed; bottom: 24px; left: 50%;
                    transform: translateX(-50%) translateY(150%);
                    width: calc(100% - 32px); max-width: 400px;
                    z-index: 9999; opacity: 0; pointer-events: none;
                    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s;
                }
                .pwa-sticky-bar.visible { transform: translateX(-50%) translateY(0); opacity: 1; pointer-events: auto; }
                .pwa-bar-content {
                    background: rgba(30, 37, 42, 0.85); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
                    border: 1px solid var(--border); border-radius: 24px;
                    padding: 10px 16px; display: flex; align-items: center;
                    justify-content: space-between; box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
                }
                .pwa-bar-info { display: flex; align-items: center; gap: 12px; }
                .pwa-bar-icon { 
                    width: 42px; height: 42px; background: var(--accent-green); 
                    border-radius: 12px; display: flex; align-items: center; 
                    justify-content: center; font-size: 1.3rem;
                    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
                }
                .pwa-bar-text strong { color: var(--text-white); font-size: 0.9rem; display: block; line-height: 1.2; }
                .pwa-bar-text span { color: var(--text-gray); font-size: 0.75rem; }
                .btn-pwa-add {
                    background: var(--accent-green); color: #000; border: none;
                    padding: 8px 18px; border-radius: 14px; font-weight: 800;
                    font-size: 0.75rem; text-transform: uppercase; cursor: pointer;
                    transition: transform 0.2s;
                }
                .btn-pwa-add:active { transform: scale(0.95); }
                .btn-pwa-close {
                    background: transparent; color: var(--text-gray);
                    border: none; font-size: 1.5rem; cursor: pointer;
                    line-height: 1; padding: 0 4px;
                }
            `;
            document.head.appendChild(style);

            const pwaWrapper = document.createElement('div');
            pwaWrapper.id = 'pwa-mini-banner';
            pwaWrapper.className = 'pwa-sticky-bar';
            pwaWrapper.innerHTML = `
                <div class="pwa-bar-content">
                    <div class="pwa-bar-info">
                        <span class="pwa-bar-icon"><svg width="512" height="512" viewBox="0 0 512 512" fill="none" xmlns="http://www.w3.org/2000/svg">
  <rect width="512" height="512" rx="120" fill="#151a1e"/>
  
  <path d="M380 380L430 430" stroke="#ffffff" stroke-width="32" stroke-linecap="round"/>
  <circle cx="256" cy="256" r="160" stroke="#ffffff" stroke-width="32"/>
  
  <rect x="190" y="270" width="30" height="60" rx="4" fill="#10b981"/>
  <rect x="241" y="230" width="30" height="100" rx="4" fill="#10b981"/>
  <rect x="292" y="190" width="30" height="140" rx="4" fill="#10b981"/>
</svg></span>
                        <div class="pwa-bar-text">
                            <strong>QuantVAT App</strong>
                            <span>Install for instant access</span>
                        </div>
                    </div>
                    <div style="display: flex; align-items: center; gap: 8px;">
                        <button id="btn-pwa-install" class="btn-pwa-add">${isIOS ? 'Show' : 'Add'}</button>
                        <button id="btn-pwa-close-trigger" class="btn-pwa-close">×</button>
                    </div>
                </div>
            `;
            document.body.appendChild(pwaWrapper);
            setTimeout(() => pwaWrapper.classList.add('visible'), 100);

            document.getElementById('btn-pwa-install').addEventListener('click', async () => {
    if (isIOS) {
        alert("To install: Tap the 'Share' icon and select 'Add to Home Screen'.");
        return;
    }
    if (!deferredPrompt) return;
    deferredPrompt.prompt();
    const { outcome } = await deferredPrompt.userChoice;
    deferredPrompt = null;
    pwaWrapper.classList.remove('visible');
    setTimeout(() => { pwaWrapper.remove(); style.remove(); }, 600);
});

            document.getElementById('btn-pwa-close-trigger').addEventListener('click', () => {
                pwaWrapper.classList.remove('visible');
                localStorage.setItem('pwa_dismissed_at', Date.now());
                setTimeout(() => { 
                    pwaWrapper.remove(); 
                    style.remove(); 
                }, 600);
            });
        }
    };

    if ('requestIdleCallback' in window) {
        window.requestIdleCallback(performInjection);
    } else {
        window.addEventListener('load', performInjection);
    }
})();
</script>