更新小程序和管理后台配置，将 API 地址切换为生产环境。新增撤回打款功能，允许用户在特定状态下撤回打款请求，并优化相关页面交互。更新文档以反映新的流程图，确保用户体验一致性。

soul-api/internal/handler/admin_withdrawals.go

@@ -351,6 +351,45 @@ func AdminWithdrawalsAction(c *gin.Context) {
 	}
 }
 
+// AdminWithdrawalsCancel POST /api/admin/withdrawals/cancel 撤回打款（仅 processing/pending_confirm 可撤回）
+func AdminWithdrawalsCancel(c *gin.Context) {
+	var body struct {
+		ID string `json:"id"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || body.ID == "" {
+		c.JSON(http.StatusOK, gin.H{"success": false, "error": "缺少 id"})
+		return
+	}
+	db := database.DB()
+	var w model.Withdrawal
+	if err := db.Where("id = ?", body.ID).First(&w).Error; err != nil {
+		c.JSON(http.StatusOK, gin.H{"success": false, "error": "提现记录不存在"})
+		return
+	}
+	st := ""
+	if w.Status != nil {
+		st = *w.Status
+	}
+	if st != "processing" && st != "pending_confirm" {
+		c.JSON(http.StatusOK, gin.H{"success": false, "error": "当前状态不允许撤回，仅待确认收款时可撤回"})
+		return
+	}
+	outBillNo := body.ID
+	if w.DetailNo != nil && *w.DetailNo != "" {
+		outBillNo = *w.DetailNo
+	}
+	if err := wechat.CancelTransferByOutBill(outBillNo); err != nil {
+		c.JSON(http.StatusOK, gin.H{"success": false, "error": "撤回失败: " + err.Error()})
+		return
+	}
+	now := time.Now()
+	reason := "商户已撤回"
+	_ = db.Model(&w).Updates(map[string]interface{}{
+		"status": "failed", "fail_reason": reason, "error_message": reason, "processed_at": now,
+	}).Error
+	c.JSON(http.StatusOK, gin.H{"success": true, "message": "已撤回打款"})
+}
+
 // AdminWithdrawalsSync POST /api/admin/withdrawals/sync 主动向微信查询转账结果并更新状态（无回调时的备选）
 // body: { "id": "提现记录id" } 同步单条；不传 id 或 id 为空则同步所有 processing/pending_confirm
 func AdminWithdrawalsSync(c *gin.Context) {