总览模式标签改为 sim / live，去掉模拟/实盘字样。

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

static/hub.js

@@ -480,8 +480,8 @@
       "<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("模拟", "sim", s.sim) +
-      modeRow("实盘", "live", s.live) +
+      modeRow("sim", "sim", s.sim) +
+      modeRow("live", "live", s.live) +
       "</tbody></table></div>";
   }