fix: Sentinel 改用前端轮询替代 SSE (解决 EventSource 认证问题)

SSE 跨 panel_auth 认证层不可靠 → 改用 setInterval 每 2s fetch /sentinel/api/nodes

Co-Authored-By: Claude <noreply@anthropic.com>

plugins/sentinel/dashboard.html

@@ -66,7 +66,7 @@
   </style>
 
   <script>
-    var sseConn = null;
+    var pollTimer = null;
     var editingId = null;
 
     function switchTab(t) {
@@ -116,20 +116,14 @@
     function fmtSpeed(bps) { return bps<1024?bps.toFixed(0)+'B/s':(bps<1048576?(bps/1024).toFixed(0)+'K/s':(bps/1048576).toFixed(1)+'M/s'); }
     function esc(s) { return String(s).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;'); }
 
-    function connectSSE() {
-      if (sseConn) { sseConn.close(); sseConn = null; }
-      sseConn = new EventSource("/plugin/sentinel/sse");
-      sseConn.addEventListener("nodes_update", function(e){
-        var d = JSON.parse(e.data);
+    function pollNodes() {
+      fetch("/sentinel/api/nodes").then(function(r){return r.json()}).then(function(d){
         if (d.nodes) renderNodes(d.nodes);
-      });
-      sseConn.onerror = function(){ setTimeout(connectSSE, 5000); };
+      }).catch(function(){});
     }
 
-    fetch("/sentinel/api/nodes").then(function(r){return r.json()}).then(function(d){
-      if (d.nodes) renderNodes(d.nodes);
-    }).catch(function(){});
-    connectSSE();
+    pollNodes();
+    pollTimer = setInterval(pollNodes, 2000);
 
     // ═══ 节点管理 ═══
     function showAdd(){