Move the Evaluations placeholder nav entry to Members

Fits better next to Groups/Households than under Settings -- it's about
people, not club configuration.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ECGMEwrc2k4D8VQuwjstj9

management/tests.py

@@ -6747,7 +6747,7 @@ class EvaluationsComingSoonViewTests(ManagementTestBase):
     def test_nav_shows_the_placeholder_unconditionally_no_flag_needed(self):
         self.client.force_login(self.admin_user)
 
-        response = self.club_get("club_settings")
+        response = self.club_get("member_list")
 
         self.assertContains(response, "Evaluations")