fix issue where repair behavior targets enemy HQ in balancing target

src/lib/ecs/system/ai/BehaviorTargeting.cpp

@@ -23,10 +23,14 @@ std::vector<RepairableInfo> buildRepairables(EntityAdmin& admin)
         });
 
     admin.forEach<StationBodyComponent, PositionComponent, FactionComponent, HealthComponent>(
-        [&repairables](entt::entity e, const StationBodyComponent& /*sb*/,
+        [&repairables, &admin](entt::entity e, const StationBodyComponent& /*sb*/,
                        const PositionComponent& pos, const FactionComponent& f,
                        const HealthComponent& h)
         {
+            // The HQ is not a repair target — only ships and defence stations are
+            // (REQ-SHP-REPAIR). In the balancing arena the HQ is spawned as a station,
+            // so it is identified by its HqProxyComponent tag.
+            if (admin.hasAll<HqProxyComponent>(e)) { return; }
             repairables.push_back({e, pos.value, f.isEnemy, false, h.hp, h.maxHp});
         });
 
@@ -52,9 +56,13 @@ std::vector<CombatantInfo> buildCombatants(EntityAdmin& admin)
         });
 
     admin.forEach<PositionComponent, FactionComponent, HqProxyComponent>(
-        [&combatants](entt::entity e, const PositionComponent& pos,
+        [&combatants, &admin](entt::entity e, const PositionComponent& pos,
                       const FactionComponent& f, const HqProxyComponent& /*hq*/)
         {
+            // An arena HQ carries both StationBodyComponent and HqProxyComponent; it
+            // is already listed by the station pass above, so skip it here to avoid
+            // counting it twice.
+            if (admin.hasAll<StationBodyComponent>(e)) { return; }
             combatants.push_back({e, pos.value, f.isEnemy, true});
         });