Fix planet and ship lighting regression

src/game/GameApp.ts

@@ -1086,6 +1086,8 @@ export class GameApp {
     }
     this.camera.updateProjectionMatrix();
 
+    const focusedSystemId = this.findNearestSystem(this.getCameraFocus()).definition.id;
+
     this.systems.forEach((system) => {
       const universe = this.viewLevel === "universe";
 
@@ -1106,6 +1108,7 @@ export class GameApp {
       });
 
       system.star.visible = !universe;
+      system.light.visible = !universe && system.definition.id === focusedSystemId;
       system.strategicMarker.visible = universe;
     });