general solution to voice control

lib/elixir_ai_web/plugs/voice_session_id.ex

@@ -0,0 +1,23 @@
+defmodule ElixirAiWeb.Plugs.VoiceSessionId do
+  @moduledoc """
+  Ensures a `voice_session_id` exists in the Plug session.
+
+  This UUID ties VoiceLive (root layout) to page LiveViews (inner content)
+  so they can discover each other via `:pg` process groups.
+  """
+
+  import Plug.Conn
+
+  def init(opts), do: opts
+
+  def call(conn, _opts) do
+    case get_session(conn, "voice_session_id") do
+      nil ->
+        id = Ecto.UUID.generate()
+        put_session(conn, "voice_session_id", id)
+
+      _existing ->
+        conn
+    end
+  end
+end