Route Afia through the platform AI relay when no local API key is set.

Frontdesk now calls ladill.com/api/afia/chat using IDENTITY_API_KEY_FRONTDESK
so production does not need a separate OpenAI key in the frontdesk .env.

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

config/afia.php

@@ -6,5 +6,9 @@ return [
     'enabled' => (bool) env('AFIA_ENABLED', true),
     'provider' => env('AFIA_PROVIDER', 'openai'), // openai | anthropic
     'model' => env('AFIA_MODEL', 'gpt-4o-mini'),
+    // Optional direct provider key. When empty, Afia uses the platform relay below.
     'api_key' => env('AFIA_API_KEY', env('OPENAI_API_KEY')),
+    // Platform relay — uses the monolith's configured AI keys (same pattern as Billing).
+    'platform_api_url' => env('AFIA_PLATFORM_API_URL', env('IDENTITY_API_URL', 'https://ladill.com/api')),
+    'platform_api_key' => env('AFIA_PLATFORM_API_KEY', env('IDENTITY_API_KEY_FRONTDESK')),
 ];