feat: 技术债务清理（支付配置动态化、API文档补全、轮询常量提取、废弃代码清理）

internal/handler/admin/polling_manual_trigger.go

@@ -293,13 +293,13 @@ func (h *PollingManualTriggerHandler) getTriggerTypeName(triggerType string) str
 
 func (h *PollingManualTriggerHandler) getStatusName(status string) string {
 	switch status {
-	case "pending":
+	case constants.PollingManualTriggerStatusPending:
 		return "待处理"
-	case "processing":
+	case constants.PollingManualTriggerStatusProcessing:
 		return "处理中"
-	case "completed":
+	case constants.PollingManualTriggerStatusCompleted:
 		return "已完成"
-	case "cancelled":
+	case constants.PollingManualTriggerStatusCancelled:
 		return "已取消"
 	default:
 		return status