Fix orders defpage endpoint references — app-level not blueprint

defpages mounted via auto_mount_pages() register endpoints without
blueprint prefix. Fix url_for("orders.defpage_*") → url_for("defpage_*").

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

orders/bp/order/routes.py

@@ -42,7 +42,7 @@ def register() -> Blueprint:
             return await make_response("Order not found", 404)
 
         if order.status == "paid":
-            return redirect(url_for("orders.defpage_order_detail", order_id=order.id))
+            return redirect(url_for("defpage_order_detail", order_id=order.id))
 
         if order.sumup_hosted_url:
             return redirect(order.sumup_hosted_url)
@@ -102,13 +102,13 @@ def register() -> Blueprint:
             return await make_response("Order not found", 404)
 
         if not order.sumup_checkout_id:
-            return redirect(url_for("orders.defpage_order_detail", order_id=order.id))
+            return redirect(url_for("defpage_order_detail", order_id=order.id))
 
         try:
             await check_sumup_status(g.s, order)
         except Exception:
             pass
 
-        return redirect(url_for("orders.defpage_order_detail", order_id=order.id))
+        return redirect(url_for("defpage_order_detail", order_id=order.id))
 
     return bp

orders/bp/orders/routes.py

@@ -88,7 +88,7 @@ def register(url_prefix: str) -> Blueprint:
                 "total_formatted": f"{o.total_amount or 0:.2f}",
             })
 
-        detail_prefix = pfx + url_for("orders.defpage_order_detail", order_id=0).rsplit("0/", 1)[0]
+        detail_prefix = pfx + url_for("defpage_order_detail", order_id=0).rsplit("0/", 1)[0]
         qs_fn = makeqs_factory()
         rows_url = pfx + url_for("orders.orders_rows")