Fix create trade offer flow and other related bugs

accounts/models.py

@@ -4,6 +4,11 @@ from django.core.exceptions import ValidationError
 
 class CustomUser(AbstractUser):
     default_friend_code = models.ForeignKey("FriendCode", on_delete=models.SET_NULL, null=True, blank=True)
+    show_friend_code_on_link_previews = models.BooleanField(
+        default=False,
+        verbose_name="Show Friend Code on Link Previews",
+        help_text="This will primarily affect share link previews on X, Discord, etc."
+    )
 
     def __str__(self):
         return self.email