fix(messages): timezone is missing from datetime (#4086)

extensions/messages/src/Dialog.php

@@ -42,6 +42,10 @@ class Dialog extends AbstractModel
 
     protected $table = 'dialogs';
 
+    protected $casts = [
+        'last_message_at' => 'datetime'
+    ];
+
     public $timestamps = true;
 
     public static array $types = ['direct'];

extensions/messages/src/UserDialogState.php

@@ -36,6 +36,7 @@ class UserDialogState extends AbstractModel
         'user_id' => 'integer',
         'dialog_id' => 'integer',
         'joined_at' => 'datetime',
+        'last_read_at' => 'datetime',
         'last_read_message_id' => 'integer'
     ];