feat: add default content pages for delivery, privacy and terms

Replace one-off ShopLive.About with generic ShopLive.Content that
handles all static content pages via live_action. Add delivery &
returns, privacy policy, and terms of service pages with sample
content. Update footer help links and theme editor preview.

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

lib/simpleshop_theme_web/live/shop_live/about.ex

@@ -1,54 +0,0 @@
-defmodule SimpleshopThemeWeb.ShopLive.About do
-  use SimpleshopThemeWeb, :live_view
-
-  alias SimpleshopTheme.Settings
-  alias SimpleshopTheme.Media
-  alias SimpleshopTheme.Theme.{CSSCache, CSSGenerator}
-
-  @impl true
-  def mount(_params, _session, socket) do
-    theme_settings = Settings.get_theme_settings()
-
-    generated_css =
-      case CSSCache.get() do
-        {:ok, css} ->
-          css
-
-        :miss ->
-          css = CSSGenerator.generate(theme_settings)
-          CSSCache.put(css)
-          css
-      end
-
-    logo_image = Media.get_logo()
-    header_image = Media.get_header()
-
-    socket =
-      socket
-      |> assign(:page_title, "About")
-      |> assign(:theme_settings, theme_settings)
-      |> assign(:generated_css, generated_css)
-      |> assign(:logo_image, logo_image)
-      |> assign(:header_image, header_image)
-      |> assign(:mode, :shop)
-
-    {:ok, socket}
-  end
-
-  @impl true
-  def render(assigns) do
-    ~H"""
-    <SimpleshopThemeWeb.PageTemplates.about
-      theme_settings={@theme_settings}
-      logo_image={@logo_image}
-      header_image={@header_image}
-      mode={@mode}
-      cart_items={@cart_items}
-      cart_count={@cart_count}
-      cart_subtotal={@cart_subtotal}
-      cart_drawer_open={@cart_drawer_open}
-      cart_status={@cart_status}
-    />
-    """
-  end
-end

lib/simpleshop_theme_web/live/shop_live/content.ex

@@ -0,0 +1,88 @@
+defmodule SimpleshopThemeWeb.ShopLive.Content do
+  use SimpleshopThemeWeb, :live_view
+
+  alias SimpleshopTheme.{Settings, Media}
+  alias SimpleshopTheme.Theme.{CSSCache, CSSGenerator, PreviewData}
+
+  @impl true
+  def mount(_params, _session, socket) do
+    theme_settings = Settings.get_theme_settings()
+
+    generated_css =
+      case CSSCache.get() do
+        {:ok, css} ->
+          css
+
+        :miss ->
+          css = CSSGenerator.generate(theme_settings)
+          CSSCache.put(css)
+          css
+      end
+
+    socket =
+      socket
+      |> assign(:theme_settings, theme_settings)
+      |> assign(:generated_css, generated_css)
+      |> assign(:logo_image, Media.get_logo())
+      |> assign(:header_image, Media.get_header())
+      |> assign(:mode, :shop)
+
+    {:ok, socket}
+  end
+
+  @impl true
+  def handle_params(_params, _uri, socket) do
+    config = page_config(socket.assigns.live_action)
+    {:noreply, assign(socket, config)}
+  end
+
+  @impl true
+  def render(assigns) do
+    ~H"""
+    <SimpleshopThemeWeb.PageTemplates.content {assigns} />
+    """
+  end
+
+  defp page_config(:about) do
+    %{
+      page_title: "About",
+      active_page: "about",
+      hero_title: "About the studio",
+      hero_description: "Your story goes here – this is sample content for the demo shop",
+      hero_background: :sunken,
+      image_src: "/mockups/night-sky-blanket-3",
+      image_alt: "Night sky blanket draped over a chair",
+      content_blocks: PreviewData.about_content()
+    }
+  end
+
+  defp page_config(:delivery) do
+    %{
+      page_title: "Delivery & returns",
+      active_page: "delivery",
+      hero_title: "Delivery & returns",
+      hero_description: "Everything you need to know about shipping and returns",
+      content_blocks: PreviewData.delivery_content()
+    }
+  end
+
+  defp page_config(:privacy) do
+    %{
+      page_title: "Privacy policy",
+      active_page: "privacy",
+      hero_title: "Privacy policy",
+      hero_description: "How we handle your personal information",
+      content_blocks: PreviewData.privacy_content()
+    }
+  end
+
+  defp page_config(:terms) do
+    %{
+      page_title: "Terms of service",
+      active_page: "terms",
+      hero_title: "Terms of service",
+      hero_description: "The legal bits",
+      content_blocks: PreviewData.terms_content()
+    }
+  end
+end