chore(mma): Implement visual simulation for Epic planning and fix UI refresh

gui_2.py

@@ -935,6 +935,8 @@ class App:
      self._pending_mma_approval = task
      if "dialog_container" in task:
       task["dialog_container"][0] = dlg
+    elif action == 'refresh_from_project':
+     self._refresh_from_project()
     elif action == "mma_spawn_approval":
      dlg = MMASpawnApprovalDialog(
       task.get("ticket_id"), 
@@ -1961,6 +1963,8 @@ class App:
   def _bg_task():
    for track_data in self.proposed_tracks:
     self._start_track_logic(track_data)
+   with self._pending_gui_tasks_lock:
+     self._pending_gui_tasks.append({'action': 'refresh_from_project'}) # Ensure UI refresh after tracks are started
    self.ai_status = "Tracks accepted and execution started."
   threading.Thread(target=_bg_task, daemon=True).start()