Add speak access for webinar/conference attendees and fix Events linking UX.

Let attendees request host-granted microphone access with LiveKit reconnect,
participant panel controls, and toolbar UI that only shows mic when allowed.
Fix Events create URL, surface API key setup guidance, and align the Webinars
sidebar icon with other nav items using currentColor strokes.

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

app/Services/Meet/ConferenceService.php

@@ -87,6 +87,14 @@ class ConferenceService
 
     public function canPublish(Room $room, Participant $participant): bool
     {
+        if (in_array($participant->role, ['host', 'co_host', 'panelist'], true)) {
+            return true;
+        }
+
+        if ($room->isTownHall() || $room->isWebinar()) {
+            return (bool) $participant->speak_granted;
+        }
+
         return in_array($participant->role, ['host', 'co_host', 'panelist'], true);
     }