Add tests for accounts, and fix allowing user to delete friend code with active trade offers and in-game-name not being set on signup

trades/models.py

@@ -25,8 +25,14 @@ class TradeOfferManager(models.Manager):
         qs = qs.filter(created_at__gte=cutoff)
         return qs.order_by("-updated_at")
 
+class TradeOfferAllManager(models.Manager):
+    def get_queryset(self):
+        # Return all trade offers without filtering by the cutoff.
+        return super().get_queryset()
+
 class TradeOffer(models.Model):
     objects = TradeOfferManager()
+    all_offers = TradeOfferAllManager()  # New unfiltered manager
 
     id = models.AutoField(primary_key=True)
     is_closed = models.BooleanField(default=False, db_index=True)