feat(server): router pipelines + live_auth hook for authenticated dashboard

server/lib/server_web/live_auth.ex

@@ -0,0 +1,14 @@
+defmodule ServerWeb.LiveAuth do
+  @moduledoc "on_mount hook for LiveView sessions requiring authentication."
+
+  import Phoenix.LiveView
+  import Phoenix.Component, only: [assign: 3]
+
+  def on_mount(:require_authenticated, _params, session, socket) do
+    if session["authenticated"] do
+      {:cont, assign(socket, :authenticated, true)}
+    else
+      {:halt, redirect(socket, to: "/login")}
+    end
+  end
+end