fix(hub): define mo in buildPositionMarketContext

Fixes monitor grid crash ReferenceError mo is not defined when opening market from position card.

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

manual_trading_hub/static/app.js

@@ -1367,6 +1367,7 @@
   }
 
   function buildPositionMarketContext(pos, monitorOrder, trendPlan, exchangeId) {
+    const mo = monitorOrder || {};
     const tpsl = resolvePositionTpsl(pos, monitorOrder, trendPlan);
     const cond = condOrdersFromPosition(pos);
     const reg = Array.isArray(pos.regular_orders) ? pos.regular_orders : [];