Add Conferences and audio-only Rooms, plus mobile schedule icon.

Split town_hall into a Conferences sidebar flow and Spaces-style Rooms with host/speaker/listener roles; enforce audio-only LiveKit UI for rooms; show schedule icon on mobile meetings index.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Services/Meet/WebinarService.php

@@ -63,7 +63,7 @@ class WebinarService
 
     public function canPublish(Room $room, Participant $participant): bool
     {
-        if ($room->type !== 'webinar') {
+        if (! in_array($room->type, ['webinar', 'town_hall'], true)) {
             return true;
         }