add order status lookup for customers

Magic link flow on contact page: customer enters email, gets a
time-limited signed link, clicks through to /orders showing all their
paid orders and full detail pages with thumbnails and product links.

- OrderLookupController generates/verifies Phoenix.Token signed links
- Contact LiveView handles lookup_orders + reset_tracking events
- Orders and OrderDetail LiveViews gated by session email
- Order detail shows thumbnails, links to products still available
- .themed-button gets base padding/font-weight so all usages are consistent
- order-summary-card sticky scoped to .cart-grid (was leaking to orders list)
- 27 new tests (1095 total)

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

lib/berrypod_web/router.ex

@@ -82,6 +82,8 @@ defmodule BerrypodWeb.Router do
       live "/products/:id", Shop.ProductShow, :show
       live "/cart", Shop.Cart, :index
       live "/checkout/success", Shop.CheckoutSuccess, :show
+      live "/orders", Shop.Orders, :index
+      live "/orders/:order_number", Shop.OrderDetail, :show
     end
 
     # Checkout (POST — creates Stripe session and redirects)
@@ -157,6 +159,13 @@ defmodule BerrypodWeb.Router do
     end
   end
 
+  # Order lookup verification — sets session email then redirects to /orders
+  scope "/", BerrypodWeb do
+    pipe_through [:browser]
+
+    get "/orders/verify/:token", OrderLookupController, :verify
+  end
+
   # Setup page — minimal live_session, no theme/cart/search hooks
   scope "/", BerrypodWeb do
     pipe_through [:browser]