feat: publish member notices and balance-aware order settlement

server/internal/logic/sys/trade_order_test.go

@@ -1,6 +1,7 @@
 package sys
 
 import (
+	"strings"
 	"testing"
 	"time"
 
@@ -35,3 +36,12 @@ func TestCanAdminMatchOrder(t *testing.T) {
 		})
 	}
 }
+
+func TestBalanceShortageMessageShowsExactDifference(t *testing.T) {
+	message := balanceShortageMessage(30000, 50000)
+	for _, expected := range []string{"余额不足", "¥300.00", "¥500.00", "还差 ¥200.00", "充值审核通过"} {
+		if !strings.Contains(message, expected) {
+			t.Fatalf("balanceShortageMessage() = %q, missing %q", message, expected)
+		}
+	}
+}