fix: MiniChart 创建移到 appendChild 之后 (canvas 需在 DOM 中)

plugins/sentinel/dashboard.html

@@ -203,18 +203,6 @@
               '<div class="card-right">'+
                 '<div class="node-time"></div>'+
               '</div>';
-            if (typeof MiniChart !== 'undefined') {
-              var mcBody = card.querySelector('.metrics-body');
-              if (mcBody) {
-                try {
-                  _chartInstances[id] = [
-                    new MiniChart(id+'-cpu', '#7aa2f7'),
-                    new MiniChart(id+'-mem', '#9ece6a'),
-                    new MiniChart(id+'-net', '#e0af68'),
-                  ];
-                } catch(e) { /* MiniChart init failed, continue without charts */ }
-              }
-            }
           } else {
             card.innerHTML =
               '<div class="node-name">'+(n.online?'🟢':'🔴')+' '+esc(n.name)+'</div>'+
@@ -225,6 +213,15 @@
               '<div class="node-time"></div>';
           }
           grid.appendChild(card);
+          if (isRow && typeof MiniChart !== 'undefined') {
+            try {
+              _chartInstances[id] = [
+                new MiniChart(id+'-cpu', '#7aa2f7'),
+                new MiniChart(id+'-mem', '#9ece6a'),
+                new MiniChart(id+'-net', '#e0af68'),
+              ];
+            } catch(e) {}
+          }
           _cardCache[id] = card;
         }