feat(hub): mobile AI one-screen and dashboard monitor counts

Fix mobile AI to scroll only in the chat area. Dashboard cards show monitor item counts with expand-to-fullscreen and color-coded position floating P&L.

manual_trading_hub/static/app.js

@@ -3618,6 +3618,22 @@
     window.addEventListener("popstate", setActiveNav);
   }
 
+  window.hubOpenMonitorExpand = function hubOpenMonitorExpand(exId) {
+    const id = String(exId || "").trim();
+    if (!id) return;
+    expandedExchangeId = id;
+    sessionStorage.setItem("hub_expanded_ex", id);
+    if (currentPage() !== "monitor") {
+      history.pushState({}, "", "/monitor");
+      setActiveNav();
+    }
+    if (lastMonitorRows.length) {
+      openExchangeFullscreen(id);
+    } else {
+      void fetchMonitorBoardSnapshot({ showLoading: true });
+    }
+  };
+
   initAuth().then((ok) => {
     if (!ok) return;
     initShellNav();