add no-JS contact form and noscript banner

Wire up the contact form with action/method/name attrs so it works
without JavaScript. Add ContactNotifier, ContactController, and a
noscript info banner in the shop root layout.

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

lib/berrypod_web/live/shop/contact.ex

@@ -1,7 +1,7 @@
 defmodule BerrypodWeb.Shop.Contact do
   use BerrypodWeb, :live_view
 
-  alias Berrypod.Orders
+  alias Berrypod.{ContactNotifier, Orders}
   alias Berrypod.Orders.OrderNotifier
   alias Berrypod.Pages
   alias BerrypodWeb.OrderLookupController
@@ -39,6 +39,23 @@ defmodule BerrypodWeb.Shop.Contact do
     {:noreply, assign(socket, :tracking_state, state)}
   end
 
+  @impl true
+  def handle_event("send_contact", params, socket) do
+    case ContactNotifier.deliver_contact_message(params) do
+      {:ok, _} ->
+        {:noreply,
+         socket
+         |> put_flash(:info, "Message sent! We'll get back to you soon.")
+         |> push_navigate(to: ~p"/contact")}
+
+      {:error, :invalid_params} ->
+        {:noreply, put_flash(socket, :error, "Please fill in all required fields.")}
+
+      {:error, _} ->
+        {:noreply, put_flash(socket, :error, "Sorry, something went wrong. Please try again.")}
+    end
+  end
+
   @impl true
   def handle_event("reset_tracking", _params, socket) do
     {:noreply, assign(socket, :tracking_state, :idle)}