实时汇总按实际实例模式显示：仅有 sim 或 live 时只显示对应行。

Co-authored-by: Cursor <cursoragent@cursor.com>

static/hub.js

@@ -452,6 +452,14 @@
         "</tr>"
       );
     }
+    const rows = [];
+    if (s.sim.machines > 0) rows.push(modeRow("sim", "sim", s.sim));
+    if (s.live.machines > 0) rows.push(modeRow("live", "live", s.live));
+    if (!rows.length) {
+      box.hidden = true;
+      box.innerHTML = "";
+      return;
+    }
     box.hidden = false;
     box.innerHTML =
       '<div class="overview-mode-wrap">' +
@@ -460,8 +468,7 @@
       "<thead><tr>" +
       "<th>模式</th><th>在线</th><th>离线</th><th>仓位</th><th>浮盈</th><th>权利金</th><th>余额</th>" +
       "</tr></thead><tbody>" +
-      modeRow("sim", "sim", s.sim) +
-      modeRow("live", "live", s.live) +
+      rows.join("") +
       "</tbody></table></div>";
   }