diff --git a/public/index.html b/public/index.html
index 2ac1a36..f7a970a 100644
--- a/public/index.html
+++ b/public/index.html
@@ -462,9 +462,13 @@ body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellips
   <div class="page active" id="page-upload">
 
     <div style="margin-top:1.5rem;margin-bottom:1.25rem">
+      <div style="display:flex;gap:.5rem;margin-bottom:.75rem">
+        <button class="mode-btn active-http" id="btn-http" onclick="setMode('http')">🌐 HTTP Mode</button>
+        <button class="mode-btn" id="btn-udp" onclick="setMode('udp')">⚡ UDP Mode</button>
+      </div>
       <div class="mode-desc" id="mode-desc" style="margin-bottom:0">
         <strong id="mode-label">HTTP Mode:</strong> <span id="mode-detail">Direct S3 presigned upload. Best for LAN and stable connections.</span>
-        <span id="udp-ext-hint" style="display:none;margin-left:.5rem;color:var(--dragon-bright);font-size:.75rem">⚡ UDP extension detected — <a href="#" onclick="setMode('udp');return false" style="color:inherit">switch to UDP</a></span>
+        <span id="udp-ext-hint" style="display:none;margin-left:.5rem;color:var(--dragon-bright);font-size:.75rem">⚡ UDP extension detected</span>
       </div>
     </div>
 
@@ -521,6 +525,7 @@ body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellips
       <div class="admin-tab" data-tab="users" onclick="switchAdminTab('users')">Users</div>
       <div class="admin-tab" data-tab="sharelinks" onclick="switchAdminTab('sharelinks')">🔗 Share Links</div>
       <div class="admin-tab" data-tab="folders" onclick="switchAdminTab('folders')">Folders</div>
+      <div class="admin-tab" data-tab="relay" onclick="switchAdminTab('relay')">⚡ UDP Relay</div>
     </div>
 
     <!-- S3 -->
@@ -922,16 +927,22 @@ function setMode(mode) {
   const label = document.getElementById('mode-label');
   const detail = document.getElementById('mode-detail');
   const hint = document.getElementById('udp-ext-hint');
+  const btnHttp = document.getElementById('btn-http');
+  const btnUdp = document.getElementById('btn-udp');
   if (mode === 'http') {
     btn.className = 'btn-upload';
     if (label) label.textContent = 'HTTP Mode:';
     if (detail) detail.textContent = 'Direct S3 presigned upload. Best for LAN and stable connections.';
     if (hint) hint.style.display = 'none';
+    if (btnHttp) { btnHttp.className = 'mode-btn active-http'; }
+    if (btnUdp) { btnUdp.className = 'mode-btn'; }
   } else {
     btn.className = 'btn-upload udp';
     if (label) label.textContent = 'UDP Mode:';
     if (detail) detail.textContent = 'Fast relay-accelerated transfer via the Chrome extension.';
     if (hint) hint.style.display = 'none';
+    if (btnHttp) { btnHttp.className = 'mode-btn'; }
+    if (btnUdp) { btnUdp.className = 'mode-btn active-udp'; }
   }
   updateUploadBtn();
 }