remove redundant theme parameter.

frontend/src/app/pages/particles/services/renderer.service.ts

@@ -21,7 +21,7 @@ export class RendererService {
     this.themeService.theme$.subscribe(theme => {
       this.currentTheme = theme;
       if (this.scene) {
-        this.setBackgroundColor(theme);
+        this.setBackgroundColor();
       }
     })
   }
@@ -32,7 +32,7 @@ export class RendererService {
   initializeRenderer(container: ElementRef): void {
     // Create scene
     this.scene = new THREE.Scene();
-    this.setBackgroundColor(this.currentTheme);
+    this.setBackgroundColor();
 
     // Get container dimensions
     const containerWidth = container.nativeElement.clientWidth;
@@ -66,7 +66,7 @@ export class RendererService {
     this.addLights();
   }
 
-  private setBackgroundColor(theme: THEME_MODE) {
+  private setBackgroundColor() {
     this.scene.background = new THREE.Color(this.currentTheme === THEME_MODE.DARK ? 0x242526 : 0xFBFBFE);
   }