feat: add timed position close (1h/2h/4h) for key levels and live orders

Program monitors open positions and market-closes at deadline; UI shows label and countdown on instance and hub boards.

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

manual_trading_hub/static/index.html

@@ -588,6 +588,7 @@
   <script src="/assets/funds.js?v=20260609-hub-funds-fold"></script>
   <script src="/assets/dashboard.js?v=20260612-dash-monitor-count"></script>
   <script src="/assets/ai_review_render.js?v=3"></script>
-  <script src="/assets/app.js?v=20260612-monitor-desktop-layout"></script>
+  <script src="/assets/time_close_ui.js?v=1"></script>
+  <script src="/assets/app.js?v=20260612-time-close"></script>
 </body>
 </html>