wire shop LiveViews to DB queries and improve search UX

Replace PreviewData indirection in all shop LiveViews with direct
Products context queries. Home, collection, product detail and error
pages now query the database. Categories loaded once in ThemeHook.
Cart hydration no longer falls back to mock data. PreviewData kept
only for the theme editor.

Search modal gains keyboard navigation (arrow keys, Enter, Escape),
Cmd+K/Ctrl+K shortcut, full ARIA combobox pattern, LiveView navigate
links, and 150ms debounce. SearchModal JS hook manages selection
state and highlight. search.ex gets transaction safety on reindex
and a public remove_product/1. 10 new integration tests.

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

test/simpleshop_theme/products/product_test.exs

@@ -288,15 +288,27 @@ defmodule SimpleshopTheme.Products.ProductTest do
       product = %{
         provider_data: %{
           "options" => [
-            %{"name" => "Size", "values" => [%{"title" => "S"}, %{"title" => "M"}]},
-            %{"name" => "Color", "values" => [%{"title" => "Red"}]}
+            %{
+              "name" => "Size",
+              "type" => "size",
+              "values" => [%{"title" => "S"}, %{"title" => "M"}]
+            },
+            %{
+              "name" => "Color",
+              "type" => "color",
+              "values" => [%{"title" => "Red", "colors" => ["#FF0000"]}]
+            }
           ]
         }
       }
 
       types = Product.option_types(product)
       assert length(types) == 2
-      assert hd(types) == %{name: "Size", values: ["S", "M"]}
+      assert hd(types) == %{name: "Size", type: :size, values: [%{title: "S"}, %{title: "M"}]}
+
+      color_type = Enum.at(types, 1)
+      assert color_type.type == :color
+      assert hd(color_type.values) == %{title: "Red", hex: "#FF0000"}
     end
 
     test "returns empty list when no provider_data" do

test/simpleshop_theme/search_test.exs

@@ -196,4 +196,18 @@ defmodule SimpleshopTheme.SearchTest do
       assert Search.search("alpine") != []
     end
   end
+
+  describe "remove_product/1" do
+    test "removes a product from the index", %{ocean: ocean} do
+      assert Search.search("ocean") != []
+
+      Search.remove_product(ocean.id)
+
+      assert Search.search("ocean") == []
+    end
+
+    test "is a no-op for unindexed product" do
+      assert Search.remove_product(-1) == :ok
+    end
+  end
 end