diff --git a/markbase-core/src/page.html b/markbase-core/src/page.html
index a51a008..7ec891e 100644
--- a/markbase-core/src/page.html
+++ b/markbase-core/src/page.html
@@ -489,7 +489,7 @@ function showTreeLoginModal(){
         '<div style="color:#60a5fa;font-size:16px;font-weight:600;margin-bottom:16px">File Tree Authentication</div>'+
         '<div style="margin-bottom:12px">'+
         '<label style="color:#94a3b8;font-size:13px;display:block;margin-bottom:4px">User ID</label>'+
-        '<input style="background:#0f172a;border:1px solid #60a5fa;border-radius:4px;color:#e2e8f0;padding:8px 12px;width:100%;font-size:13px" type=text id=tree-user placeholder="Enter user ID (e.g., demo)">'+
+        '<input style="background:#0f172a;border:1px solid #60a5fa;border-radius:4px;color:#e2e8f0;padding:8px 12px;width:100%;font-size:13px" type=text id=tree-user placeholder="Enter user ID" value="demo">'+
         '</div>'+
         '<div style="margin-bottom:12px;position:relative">'+
         '<label style="color:#94a3b8;font-size:13px;display:block;margin-bottom:4px">Password</label>'+
@@ -501,13 +501,13 @@ function showTreeLoginModal(){
         document.body.appendChild(m);
     }
     
-    document.getElementById('tree-user').value='';
+    document.getElementById('tree-user').value='demo';
     document.getElementById('tree-password').value='';
     document.getElementById('tree-password').type='password';
     document.getElementById('tree-error').textContent='';
     m.classList.add('active');
     m.style.display='block';
-    document.getElementById('tree-user').focus();
+    document.getElementById('tree-password').focus();
 }
 
 function handleTreeKeyPress(e){