wire simple pages to PageRenderer (stage 3)

Home, Content (about/delivery/privacy/terms), Contact, and ErrorHTML
now render through the generic PageRenderer instead of hardcoded
templates. Block wrapper divs enable CSS grid targeting. Featured
products block supports layout/card_variant/columns settings for
different page contexts. Contact page uses CSS grid on data-block-type
attributes for two-column layout.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/berrypod_web/page_renderer.ex

@@ -30,9 +30,9 @@ defmodule BerrypodWeb.PageRenderer do
       error_page={@page.slug == "error"}
     >
       <main id="main-content" class={page_main_class(@page.slug)}>
-        <%= for block <- @page.blocks do %>
+        <div :for={block <- @page.blocks} data-block-type={block["type"]}>
           {render_block(Map.merge(@block_assigns, %{block: block, page_slug: @page.slug}))}
-        <% end %>
+        </div>
       </main>
     </.shop_layout>
     """
@@ -85,14 +85,30 @@ defmodule BerrypodWeb.PageRenderer do
     assigns =
       assigns
       |> assign(:section_title, settings["title"] || "Featured products")
+      |> assign(:layout, settings["layout"] || "section")
+      |> assign(:card_variant, card_variant(settings["card_variant"]))
+      |> assign(:columns, grid_columns(settings["columns"]))
 
     ~H"""
-    <.featured_products_section
-      title={@section_title}
-      products={assigns[:products] || []}
-      theme_settings={@theme_settings}
-      mode={@mode}
-    />
+    <%= if @layout == "grid" do %>
+      <.product_grid columns={@columns} theme_settings={@theme_settings}>
+        <%= for product <- assigns[:products] || [] do %>
+          <.product_card
+            product={product}
+            theme_settings={@theme_settings}
+            mode={@mode}
+            variant={@card_variant}
+          />
+        <% end %>
+      </.product_grid>
+    <% else %>
+      <.featured_products_section
+        title={@section_title}
+        products={assigns[:products] || []}
+        theme_settings={@theme_settings}
+        mode={@mode}
+      />
+    <% end %>
     """
   end
 
@@ -728,6 +744,14 @@ defmodule BerrypodWeb.PageRenderer do
   defp hero_background("sunken"), do: :sunken
   defp hero_background(_), do: :base
 
+  defp card_variant("minimal"), do: :minimal
+  defp card_variant("compact"), do: :compact
+  defp card_variant("default"), do: :default
+  defp card_variant(_), do: :featured
+
+  defp grid_columns("fixed-4"), do: :fixed_4
+  defp grid_columns(_), do: nil
+
   defp breadcrumb_items(%{category: cat, title: title}) when not is_nil(cat) do
     slug = cat |> String.downcase() |> String.replace(" ", "-")