feat: scroll top button

public/app.js

@@ -8,6 +8,7 @@ const searchInput = document.getElementById('searchInput');
 const linksContainer = document.getElementById('linksContainer');
 const toastContainer = document.getElementById('toastContainer');
 const archiveToggle = document.getElementById('archiveToggle');
+const scrollToTopBtn = document.getElementById('scrollToTopBtn');
 
 // State
 let allLinks = [];
@@ -18,6 +19,7 @@ let showArchived = false;
 document.addEventListener('DOMContentLoaded', () => {
     loadLinks();
     setupEventListeners();
+    setupScrollToTop();
 });
 
 // Event listeners
@@ -27,6 +29,26 @@ function setupEventListeners() {
     archiveToggle.addEventListener('click', handleToggleArchive);
 }
 
+// Setup scroll to top button
+function setupScrollToTop() {
+    // Show/hide button based on scroll position
+    window.addEventListener('scroll', () => {
+        if (window.pageYOffset > 300) {
+            scrollToTopBtn.classList.add('show');
+        } else {
+            scrollToTopBtn.classList.remove('show');
+        }
+    });
+
+    // Scroll to top when button is clicked
+    scrollToTopBtn.addEventListener('click', () => {
+        window.scrollTo({
+            top: 0,
+            behavior: 'smooth'
+        });
+    });
+}
+
 // Load all links
 async function loadLinks() {
     try {

public/index.html

@@ -75,6 +75,12 @@
 
     <div id="toastContainer" class="toast-container"></div>
 
+    <button id="scrollToTopBtn" class="scroll-to-top-btn" title="Scroll to top">
+        <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+            <path d="M18 15l-6-6-6 6"/>
+        </svg>
+    </button>
+
     <script src="app.js"></script>
 </body>
 </html>

public/styles.css

@@ -635,6 +635,49 @@ body {
     }
 }
 
+/* Scroll to Top Button */
+.scroll-to-top-btn {
+    position: fixed;
+    bottom: 2rem;
+    right: 2rem;
+    width: 50px;
+    height: 50px;
+    border-radius: 50%;
+    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
+    color: white;
+    border: none;
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
+    transition: all 0.3s ease;
+    opacity: 0;
+    visibility: hidden;
+    transform: translateY(20px);
+    z-index: 999;
+}
+
+.scroll-to-top-btn.show {
+    opacity: 1;
+    visibility: visible;
+    transform: translateY(0);
+}
+
+.scroll-to-top-btn:hover {
+    transform: translateY(-3px);
+    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.5);
+}
+
+.scroll-to-top-btn:active {
+    transform: translateY(-1px);
+}
+
+.scroll-to-top-btn svg {
+    width: 24px;
+    height: 24px;
+}
+
 @media (max-width: 400px) {
     .header-right {
         flex-direction: column;
@@ -649,5 +692,12 @@ body {
         width: 100%;
         justify-content: flex-start;
     }
+
+    .scroll-to-top-btn {
+        bottom: 1.5rem;
+        right: 1.5rem;
+        width: 45px;
+        height: 45px;
+    }
 }