chore: apply mix format to codebase

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lib/simpleshop_theme_web/live/theme_live/index.ex

@@ -10,6 +10,7 @@ defmodule SimpleshopThemeWeb.ThemeLive.Index do
     theme_settings = Settings.get_theme_settings()
     generated_css = CSSGenerator.generate(theme_settings)
     active_preset = Presets.detect_preset(theme_settings)
+
     preview_data = %{
       products: PreviewData.products(),
       cart_items: PreviewData.cart_items(),
@@ -361,7 +362,9 @@ defmodule SimpleshopThemeWeb.ThemeLive.Index do
 
   defp preview_page(%{page: :cart} = assigns) do
     cart_items = assigns.preview_data.cart_items
-    subtotal = Enum.reduce(cart_items, 0, fn item, acc -> acc + item.product.price * item.quantity end)
+
+    subtotal =
+      Enum.reduce(cart_items, 0, fn item, acc -> acc + item.product.price * item.quantity end)
 
     assigns =
       assigns