simplify footer categories: fetch directly instead of threading assigns

shop_footer now calls PreviewData.categories() itself, removing the
need to thread categories through CartHook, shop_layout, and all 8
page templates.

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

lib/simpleshop_theme_web/cart_hook.ex

@@ -19,7 +19,6 @@ defmodule SimpleshopThemeWeb.CartHook do
   import Phoenix.LiveView, only: [attach_hook: 4, connected?: 1, push_event: 3]
 
   alias SimpleshopTheme.Cart
-  alias SimpleshopTheme.Theme.PreviewData
 
   def on_mount(:mount_cart, _params, session, socket) do
     cart_items = Cart.get_from_session(session)
@@ -29,7 +28,6 @@ defmodule SimpleshopThemeWeb.CartHook do
       |> update_cart_assigns(cart_items)
       |> assign(:cart_drawer_open, false)
       |> assign(:cart_status, nil)
-      |> assign(:categories, PreviewData.categories())
       |> attach_hook(:cart_events, :handle_event, &handle_cart_event/3)
       |> attach_hook(:cart_info, :handle_info, &handle_cart_info/2)
 

lib/simpleshop_theme_web/components/page_templates/cart.html.heex

@@ -8,7 +8,6 @@
   cart_subtotal={@cart_subtotal}
   cart_drawer_open={assigns[:cart_drawer_open] || false}
   cart_status={assigns[:cart_status]}
-  categories={assigns[:categories] || []}
   active_page="cart"
 >
   <main id="main-content" class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">

lib/simpleshop_theme_web/components/page_templates/checkout_success.html.heex

@@ -8,7 +8,6 @@
   cart_subtotal={@cart_subtotal}
   cart_drawer_open={assigns[:cart_drawer_open] || false}
   cart_status={assigns[:cart_status]}
-  categories={assigns[:categories] || []}
   active_page="checkout"
 >
   <main id="main-content" class="max-w-3xl mx-auto px-4 sm:px-6 lg:px-8 py-16">

lib/simpleshop_theme_web/components/page_templates/collection.html.heex

@@ -8,7 +8,6 @@
   cart_subtotal={@cart_subtotal}
   cart_drawer_open={assigns[:cart_drawer_open] || false}
   cart_status={assigns[:cart_status]}
-  categories={assigns[:categories] || []}
   active_page="collection"
 >
   <main id="main-content">

lib/simpleshop_theme_web/components/page_templates/contact.html.heex

@@ -8,7 +8,6 @@
   cart_subtotal={@cart_subtotal}
   cart_drawer_open={assigns[:cart_drawer_open] || false}
   cart_status={assigns[:cart_status]}
-  categories={assigns[:categories] || []}
   active_page="contact"
 >
   <main id="main-content" class="max-w-4xl mx-auto px-4 sm:px-6 lg:px-8 py-16">

lib/simpleshop_theme_web/components/page_templates/content.html.heex

@@ -8,7 +8,6 @@
   cart_subtotal={@cart_subtotal}
   cart_drawer_open={assigns[:cart_drawer_open] || false}
   cart_status={assigns[:cart_status]}
-  categories={assigns[:categories] || []}
   active_page={@active_page}
 >
   <main id="main-content" class="content-page" style="background-color: var(--t-surface-base);">

lib/simpleshop_theme_web/components/page_templates/error.html.heex

@@ -8,7 +8,6 @@
   cart_subtotal={@cart_subtotal}
   cart_drawer_open={assigns[:cart_drawer_open] || false}
   cart_status={assigns[:cart_status]}
-  categories={assigns[:categories] || []}
   active_page="error"
   error_page
 >

lib/simpleshop_theme_web/components/page_templates/home.html.heex

@@ -8,7 +8,6 @@
   cart_subtotal={@cart_subtotal}
   cart_drawer_open={assigns[:cart_drawer_open] || false}
   cart_status={assigns[:cart_status]}
-  categories={assigns[:categories] || []}
   active_page="home"
 >
   <main id="main-content">

lib/simpleshop_theme_web/components/page_templates/pdp.html.heex

@@ -8,7 +8,6 @@
   cart_subtotal={@cart_subtotal}
   cart_drawer_open={assigns[:cart_drawer_open] || false}
   cart_status={assigns[:cart_status]}
-  categories={assigns[:categories] || []}
   active_page="pdp"
 >
   <main id="main-content" class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">

lib/simpleshop_theme_web/components/shop_components/layout.ex

@@ -65,7 +65,6 @@ defmodule SimpleshopThemeWeb.ShopComponents.Layout do
   attr :cart_subtotal, :string, required: true
   attr :cart_drawer_open, :boolean, default: false
   attr :cart_status, :string, default: nil
-  attr :categories, :list, default: []
   attr :active_page, :string, required: true
   attr :error_page, :boolean, default: false
 
@@ -96,7 +95,7 @@ defmodule SimpleshopThemeWeb.ShopComponents.Layout do
 
       {render_slot(@inner_block)}
 
-      <.shop_footer theme_settings={@theme_settings} mode={@mode} categories={@categories} />
+      <.shop_footer theme_settings={@theme_settings} mode={@mode} />
 
       <.cart_drawer
         cart_items={@cart_items}
@@ -406,10 +405,12 @@ defmodule SimpleshopThemeWeb.ShopComponents.Layout do
   """
   attr :theme_settings, :map, required: true
   attr :mode, :atom, default: :live
-  attr :categories, :list, default: []
 
   def shop_footer(assigns) do
-    assigns = assign(assigns, :current_year, Date.utc_today().year)
+    assigns =
+      assigns
+      |> assign(:current_year, Date.utc_today().year)
+      |> assign(:categories, SimpleshopTheme.Theme.PreviewData.categories())
 
     ~H"""
     <footer style="background-color: var(--t-surface-raised); border-top: 1px solid var(--t-border-default);">