show accumulated threat for teams in balancing target

src/balancing/ArenaSimulation.h

@@ -40,6 +40,7 @@ struct ArenaStatus
     struct TeamStatus
     {
         std::string name;
+        double threatLevel = 0.0;    // accumulated threat of the team's configured ships
         std::vector<Entry> entries;  // HQ first, then ships, then stations
     };
 
@@ -108,6 +109,9 @@ private:
     int m_winnerTeam;
     std::atomic<bool> m_stopRequested;
 
+    // Static accumulated threat per team, computed once from the configured roster.
+    double m_teamThreat[2] = {0.0, 0.0};
+
     std::vector<WeaponFiredEvent> m_weaponFiredEvents;
 
     mutable std::mutex m_statusMutex;