refactor AI system

src/lib/ecs/system/ShipSystem.h

@@ -24,7 +24,7 @@ public:
                        const std::map<std::string, int>& moduleLevelOverrides = {});
     void despawn(entt::entity entity);
 
-    // Reset all movement intents to priority 0 before behavior systems run.
+    // Reset all movement intents to inactive before behavior systems run.
     void clearMovementIntents();
 
     // Set the rally point that newly spawned player combat ships will loiter at.
@@ -33,6 +33,11 @@ public:
     // Release all gathered player combat ships to advance toward the enemy.
     void triggerRallyDeparture();
 
+    // Controls whether newly spawned player ships receive a RetreatBehavior. The
+    // balancing tool disables this so arena fights stay symmetric and aggressive
+    // (REQ-BAL-SIM-AI); the main game keeps it enabled (REQ-SHP-RETREAT).
+    void setRetreatEnabled(bool enabled);
+
 private:
     const ShipDef*   findShipDef(const std::string& schematicId) const;
     const ModuleDef* findModuleDef(const std::string& id) const;
@@ -40,4 +45,5 @@ private:
     const GameConfig& m_config;
     EntityAdmin&      m_admin;
     QVector2D         m_rallyPoint;
+    bool              m_retreatEnabled = true;
 };