role-select.js ensures Role select card stack disappears via WS upon conclusion of Role selection, w. if-conditional support from apps.epic.views; ensured border present on card-stack when .active in _room.scss; changed default #id_tray to unhidden, only hidden during Role select until Role selected; polished & unified Role .card-front, .card.back & .card-stack styling

src/apps/epic/tests/integrated/test_views.py

@@ -762,6 +762,7 @@ class RoomViewAllRolesFilledTest(TestCase):
         response = self.client.get(reverse("epic:room", kwargs={"room_id": self.room.id}))
         parsed = self.lxml.fromstring(response.content)
         [_] = parsed.cssselect("#id_pick_sigs_btn")
+        self.assertEqual(parsed.cssselect(".card-stack"), [])
 
     def test_pick_sigs_btn_hidden_during_role_select(self):
         # Clear one role — still mid-pick, wrap must be hidden