add locale as per user setting

lib/cannery_web/live/init_assigns.ex

@@ -0,0 +1,19 @@
+defmodule CanneryWeb.InitAssigns do
+  @moduledoc """
+  Ensures common `assigns` are applied to all LiveViews attaching this hook.
+  """
+  import Phoenix.LiveView
+  alias Cannery.Accounts
+
+  def on_mount(:default, _params, %{"locale" => locale, "user_token" => user_token}, socket) do
+    Gettext.put_locale(locale)
+
+    socket =
+      socket
+      |> assign_new(:current_user, fn -> Accounts.get_user_by_session_token(user_token) end)
+
+    {:cont, socket}
+  end
+
+  def on_mount(:default, _params, _session, socket), do: {:cont, socket}
+end