Answer the inbox from the panel, with templates

A reply starts from a template filled in the language the person wrote in,
is sent by the application when it has a mailer that delivers or handed to
the replier's mail program otherwise, and is recorded on the submission.
The same is available through the API.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

config/mail.php

@@ -115,4 +115,11 @@ return [
         'name' => env('MAIL_FROM_NAME', env('APP_NAME', 'Laravel')),
     ],
 
+    // Where answers to the inbox's replies go back to. Unset, they go to the
+    // "from" address.
+    'reply_to' => [
+        'address' => env('MAIL_REPLY_TO_ADDRESS'),
+        'name' => env('MAIL_REPLY_TO_NAME', env('MAIL_FROM_NAME', env('APP_NAME', 'Laravel'))),
+    ],
+
 ];