feat(hub): rolling chat summary to cap AI context and prevent mid-session failures

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

manual_trading_hub/static/index.html

@@ -594,6 +594,6 @@
   <script src="/assets/dashboard.js?v=20260612-dash-monitor-count"></script>
   <script src="/assets/ai_review_render.js?v=3"></script>
   <script src="/assets/time_close_ui.js?v=2"></script>
-  <script src="/assets/app.js?v=20260612-archive-ai-chat"></script>
+  <script src="/assets/app.js?v=20260612-ai-chat-budget"></script>
 </body>
 </html>