improve cart recovery: product links in email, persistent session cookie

- add product_id to order_items (migration + schema + create_order)
- cart recovery email now includes a direct product link per item
- extend session cookie max_age to 7 days so carts survive browser restarts

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

lib/berrypod/orders.ex

@@ -98,6 +98,7 @@ defmodule Berrypod.Orders do
               %{
                 order_id: order.id,
                 variant_id: item.variant_id,
+                product_id: item[:product_id],
                 product_name: item.name,
                 variant_title: item.variant,
                 quantity: item.quantity,

lib/berrypod/orders/order_item.ex

@@ -7,6 +7,7 @@ defmodule Berrypod.Orders.OrderItem do
 
   schema "order_items" do
     field :variant_id, :string
+    field :product_id, :string
     field :product_name, :string
     field :variant_title, :string
     field :quantity, :integer
@@ -19,7 +20,15 @@ defmodule Berrypod.Orders.OrderItem do
 
   def changeset(item, attrs) do
     item
-    |> cast(attrs, [:variant_id, :product_name, :variant_title, :quantity, :unit_price, :order_id])
+    |> cast(attrs, [
+      :variant_id,
+      :product_id,
+      :product_name,
+      :variant_title,
+      :quantity,
+      :unit_price,
+      :order_id
+    ])
     |> validate_required([:variant_id, :product_name, :quantity, :unit_price])
     |> validate_number(:quantity, greater_than: 0)
     |> validate_number(:unit_price, greater_than_or_equal_to: 0)

lib/berrypod/orders/order_notifier.ex

@@ -100,6 +100,7 @@ defmodule Berrypod.Orders.OrderNotifier do
   def deliver_cart_recovery(cart, order, unsubscribe_url) do
     from_address = Berrypod.Settings.get_setting("email_from_address", "contact@example.com")
     subject = "You left something behind"
+    base_url = BerrypodWeb.Endpoint.url()
 
     body = """
     ==============================
@@ -107,11 +108,9 @@ defmodule Berrypod.Orders.OrderNotifier do
     You recently started a checkout but didn't complete it.
 
     Your cart had:
-    #{format_items(order.items)}
+    #{format_cart_items(order.items, base_url)}
     Total: #{Cart.format_price(cart.cart_total)}
 
-    If you'd like to complete your order, head to our shop and add these items again.
-
     We're only sending this once.
 
     Don't want to hear from us? Unsubscribe: #{unsubscribe_url}
@@ -169,6 +168,22 @@ defmodule Berrypod.Orders.OrderNotifier do
 
   defp format_items(_), do: ""
 
+  defp format_cart_items(items, base_url) when is_list(items) do
+    items
+    |> Enum.map_join("\n", fn item ->
+      price = Cart.format_price(item.unit_price * item.quantity)
+      line = "  #{item.quantity}x #{item.product_name} (#{item.variant_title}) - #{price}"
+
+      if item.product_id do
+        line <> "\n  #{base_url}/products/#{item.product_id}"
+      else
+        line
+      end
+    end)
+  end
+
+  defp format_cart_items(_, _), do: ""
+
   defp format_shipping_address(address) when is_map(address) and map_size(address) > 0 do
     lines =
       [

lib/berrypod_web/endpoint.ex

@@ -8,7 +8,8 @@ defmodule BerrypodWeb.Endpoint do
     store: :cookie,
     key: "_berrypod_key",
     signing_salt: "JNwRcD7y",
-    same_site: "Lax"
+    same_site: "Lax",
+    max_age: 604_800
   ]
 
   socket "/live", Phoenix.LiveView.Socket,