naval invasion alert added

src/core/execution/TransportShipExecution.ts

@@ -69,6 +69,15 @@ export class TransportShipExecution implements Execution {
 
     this.attacker = mg.player(this.attackerID);
 
+    // Notify the target player about the incoming naval invasion
+    if (this.targetID && this.targetID !== mg.terraNullius().id()) {
+      mg.displayMessage(
+        `Naval invasion incoming from ${this.attacker.displayName()}`,
+        MessageType.WARN,
+        this.targetID,
+      );
+    }
+
     if (
       this.attacker.units(UnitType.TransportShip).length >=
       mg.config().boatMaxNumber()