feat: enhance store header layout for better responsiveness and add mobile menu functionality

src/app/shared/components/icon-button/icon-button.component.scss

@@ -69,7 +69,8 @@
   color: var(--tenant-danger);
 }
 
-.icon-btn--user {
+.icon-btn--user,
+.icon-btn--bars {
   i {
     width: 23px;
     height: 23px;

src/app/shared/components/icon-button/icon-button.component.ts

@@ -10,7 +10,8 @@ export type IconButtonVariant =
   | 'angle-down'
   | 'copy'
   | 'download'
-  | 'share';
+  | 'share'
+  | 'bars';
 
 @Component({
   selector: 'app-icon-button',
@@ -38,6 +39,7 @@ export class IconButtonComponent {
       copy: 'fa-solid fa-copy',
       download: 'fa-solid fa-download',
       share: 'fa-solid fa-share-nodes',
+      bars: 'fa-solid fa-bars',
     };
     return classes[this.variant()];
   });