feat: refactor services injection in search and store home components, add direct purchase event tests

src/app/shared/components/product-vertical-with-cart-card/product-vertical-with-cart-card.component.spec.ts

@@ -83,7 +83,7 @@ describe('ProductVerticalWithCartCardComponent', () => {
     ) as HTMLButtonElement;
     button.click();
 
-    expect(buySpy).toHaveBeenCalledOnce();
+    expect(buySpy).toHaveBeenCalledWith({ quantity: 1 });
   });
 
   it('emits addToCart with the current quantity', async () => {