wire order pages and theme preview to page renderer, remove old templates

All 14 pages now render through PageRenderer. Theme editor preview
unified from 10 preview_page clauses to one function + page-context
helpers. PageTemplates module and 10 .heex template files deleted.

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

lib/berrypod_web/live/shop/checkout_success.ex

@@ -1,7 +1,7 @@
 defmodule BerrypodWeb.Shop.CheckoutSuccess do
   use BerrypodWeb, :live_view
 
-  alias Berrypod.{Analytics, Orders}
+  alias Berrypod.{Analytics, Orders, Pages}
 
   @impl true
   def mount(%{"session_id" => session_id}, _session, socket) do
@@ -29,10 +29,13 @@ defmodule BerrypodWeb.Shop.CheckoutSuccess do
         socket
       end
 
+    page = Pages.get_page("checkout_success")
+
     socket =
       socket
       |> assign(:page_title, "Order confirmed")
       |> assign(:order, order)
+      |> assign(:page, page)
 
     {:ok, socket}
   end
@@ -49,7 +52,7 @@ defmodule BerrypodWeb.Shop.CheckoutSuccess do
   @impl true
   def render(assigns) do
     ~H"""
-    <BerrypodWeb.PageTemplates.checkout_success {assigns} />
+    <BerrypodWeb.PageRenderer.render_page {assigns} />
     """
   end
 end

lib/berrypod_web/live/shop/order_detail.ex

@@ -1,13 +1,20 @@
 defmodule BerrypodWeb.Shop.OrderDetail do
   use BerrypodWeb, :live_view
 
-  alias Berrypod.Orders
+  alias Berrypod.{Orders, Pages}
   alias Berrypod.Products
   alias Berrypod.Products.ProductImage
 
   @impl true
   def mount(_params, session, socket) do
-    {:ok, assign(socket, :lookup_email, session["order_lookup_email"])}
+    page = Pages.get_page("order_detail")
+
+    socket =
+      socket
+      |> assign(:lookup_email, session["order_lookup_email"])
+      |> assign(:page, page)
+
+    {:ok, socket}
   end
 
   @impl true
@@ -49,7 +56,7 @@ defmodule BerrypodWeb.Shop.OrderDetail do
   @impl true
   def render(assigns) do
     ~H"""
-    <BerrypodWeb.PageTemplates.order_detail {assigns} />
+    <BerrypodWeb.PageRenderer.render_page {assigns} />
     """
   end
 end

lib/berrypod_web/live/shop/orders.ex

@@ -1,16 +1,18 @@
 defmodule BerrypodWeb.Shop.Orders do
   use BerrypodWeb, :live_view
 
-  alias Berrypod.Orders
+  alias Berrypod.{Orders, Pages}
 
   @impl true
   def mount(_params, session, socket) do
     email = session["order_lookup_email"]
+    page = Pages.get_page("orders")
 
     socket =
       socket
       |> assign(:page_title, "Your orders")
       |> assign(:lookup_email, email)
+      |> assign(:page, page)
 
     socket =
       if email do
@@ -28,7 +30,7 @@ defmodule BerrypodWeb.Shop.Orders do
   @impl true
   def render(assigns) do
     ~H"""
-    <BerrypodWeb.PageTemplates.orders {assigns} />
+    <BerrypodWeb.PageRenderer.render_page {assigns} />
     """
   end
 end