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/ladill.php

@@ -2,5 +2,5 @@
 
 return [
     'product_slug' => 'meet',
-    'marketing_url' => env('LADILL_MARKETING_URL', 'https://ladill.com'),
+    'marketing_url' => env('LADILL_MARKETING_URL', 'https://ladill.com/products/meet'),
 ];