diff --git a/public/css/style.css b/public/css/style.css
index a512207..a015eb3 100644
--- a/public/css/style.css
+++ b/public/css/style.css
@@ -1458,7 +1458,7 @@ input:checked+.slider:before {
   width: 100%;
   height: 100vh;
   height: 100dvh;
-  z-index: 1000;
+  z-index: 9999;
   display: flex;
   align-items: center;
   justify-content: center;
diff --git a/public/index.html b/public/index.html
index 943d0c8..260f4f4 100644
--- a/public/index.html
+++ b/public/index.html
@@ -80,6 +80,20 @@
       observer.observe(document.documentElement, { childList: true, subtree: true });
     })();
   </script>
+  <script>
+    // Global Error Logger for remote debugging
+    window.onerror = function(msg, url, line, col, error) {
+      var debugDiv = document.getElementById('js-debug-overlay');
+      if (!debugDiv) {
+        debugDiv = document.createElement('div');
+        debugDiv.id = 'js-debug-overlay';
+        debugDiv.style.cssText = 'position:fixed;top:0;left:0;width:100%;background:rgba(220,38,38,0.95);color:white;z-index:99999;padding:10px;font-family:monospace;font-size:12px;max-height:30vh;overflow:auto;pointer-events:none;';
+        document.body.appendChild(debugDiv);
+      }
+      debugDiv.innerHTML += '<div>[JS ERROR] ' + msg + ' at ' + line + ':' + col + '</div>';
+      return false;
+    };
+  </script>
 </head>
 
 <body>
diff --git a/public/js/app.js b/public/js/app.js
index d98fb6a..dded584 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -2190,7 +2190,7 @@
 
   async function saveSiteSettings() {
     if (!user) {
-      showSiteMessage('请先登录后操作', 'error');
+      showSiteMessage('Please login first', 'error');
       openLoginModal();
       return;
     }
