Improve conferences, guest entry, Afia, and cross-app scheduling.

Route guests through silent SSO to the Meet product page, fix Afia context
query, add conference green-room UX and copy, and extend service API for
Care/CRM/Invoice calendar integration.

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

config/meet.php

@@ -41,6 +41,16 @@ return [
         'monthly' => 'Monthly',
     ],
 
+    'schedule_timezones' => [
+        'UTC',
+        'America/New_York',
+        'America/Chicago',
+        'America/Los_Angeles',
+        'Europe/London',
+        'Africa/Accra',
+        'Africa/Lagos',
+    ],
+
     'participant_roles' => [
         'host' => 'Host',
         'co_host' => 'Co-host',
@@ -139,6 +149,7 @@ return [
         'frontdesk' => env('MEET_API_KEY_FRONTDESK'),
         'hr' => env('MEET_API_KEY_HR'),
         'support' => env('MEET_API_KEY_SUPPORT'),
+        'invoice' => env('MEET_API_KEY_INVOICE'),
     ],
 
     'webhook_events' => [