diff --git a/plugins/sentinel/dashboard.html b/plugins/sentinel/dashboard.html
index 7c3a89e..27516a6 100644
--- a/plugins/sentinel/dashboard.html
+++ b/plugins/sentinel/dashboard.html
@@ -371,9 +371,15 @@ function bar(v) { return v < 60 ? 'bar-green' : (v < 85 ? 'bar-yellow' : 'bar-re
     function esc(s) { return String(s).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;'); }
 
     function pollNodes() {
-      fetch("/sentinel/api/nodes").then(function(r){return r.json()}).then(function(d){
+      console.log("pollNodes: fetching...");
+      fetch("/sentinel/api/nodes").then(function(r){
+        console.log("pollNodes: status="+r.status);
+        return r.json();
+      }).then(function(d){
+        console.log("pollNodes: got "+ (d.nodes ? d.nodes.length : 0) +" nodes");
         renderNodes(d.nodes || []);
       }).catch(function(e){
+        console.error("pollNodes error:", e);
         var grid = document.getElementById("sentinel-grid");
         if (grid && _firstRender) {
           grid.innerHTML = '<div class="card" style="text-align:center;padding:24px;color:var(--error)">连接失败 — 检查节点配置</div>';