add legal page generator for privacy, delivery, and terms

Replaces hardcoded PreviewData placeholders with generated content
derived from real shop state: connected providers (production lead
times), shipping countries (grouped by region), shop country
(jurisdiction language and governing law), and feature flags
(abandoned cart recovery section, newsletter, VAT clause).

Returns policy correctly cites Consumer Contracts Regulations Reg
28(1)(b) for POD exemption and Consumer Rights Act for defective goods.
Cart recovery section uses jurisdiction-specific wording: PECR Reg 22
for UK, GDPR Art 6(1)(f) for EU, generic otherwise.

About page unchanged — shop owner's story to tell.

26 new tests.

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

test/berrypod_web/live/shop/content_test.exs

@@ -36,16 +36,15 @@ defmodule BerrypodWeb.Shop.ContentTest do
     test "displays delivery content", %{conn: conn} do
       {:ok, _view, html} = live(conn, ~p"/delivery")
 
-      assert html =~ "Shipping"
+      assert html =~ "Production time"
       assert html =~ "Returns & exchanges"
       assert html =~ "Cancellations"
     end
 
-    test "displays list items", %{conn: conn} do
+    test "displays shipping fallback when no rates are configured", %{conn: conn} do
       {:ok, _view, html} = live(conn, ~p"/delivery")
 
-      assert html =~ "United Kingdom"
-      assert html =~ "5–8 business days"
+      assert html =~ "worldwide"
     end
   end
 
@@ -78,7 +77,7 @@ defmodule BerrypodWeb.Shop.ContentTest do
       {:ok, _view, html} = live(conn, ~p"/terms")
 
       assert html =~ "Products"
-      assert html =~ "Orders & payment"
+      assert html =~ "Payment"
       assert html =~ "Intellectual property"
     end
   end