feat: restyle fund overview with HUD UI and nav reorder

Move funds before monitor in nav while keeping monitor the default landing page; use card layout with curves in fullscreen and a tech/AI-themed funds dashboard.

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

manual_trading_hub/static/app.js

@@ -654,6 +654,7 @@
       el.classList.toggle("hidden", el.id !== pageId);
     });
     document.body.classList.toggle("hub-page-ai", page === "ai");
+    document.body.classList.toggle("hub-page-funds", page === "funds");
     syncHubAiMobileViewport();
     if (page === "monitor") startMonitorPoll();
     else stopMonitorPoll();