test: adapt tests to reflect implementation details

lib/mv_web/live/group_live/index.ex

@@ -22,8 +22,8 @@ defmodule MvWeb.GroupLive.Index do
   def mount(_params, _session, socket) do
     actor = current_actor(socket)
 
-    # Check if user can read groups
-    if can?(actor, :read, Mv.Membership.Group) do
+    # Check if user can access the groups page (page permission check)
+    if can_access_page?(actor, "/groups") do
       groups = load_groups(actor)
 
       {:ok,