chore: release server-v1.0.72

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YZ4DskSRKsSiheQonFtQvx

backend/internal/handler/stock_in.go

@@ -255,3 +255,18 @@ func (h *StockInHandler) Reject(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, gin.H{"message": "rejected"})
 }
+
+// Withdraw PUT /api/v1/stock-in/orders/:id/withdraw
+// 审核中(pending)撤回为草稿(draft)，供管理员修改后重新提交。仅 pending 可撤回；
+// 已审核(approved)单据只读、库存已变动，不可撤回。
+func (h *StockInHandler) Withdraw(c *gin.Context) {
+	shopID := middleware.GetShopID(c)
+	result := h.db.Model(&model.StockInOrder{}).
+		Where("id = ? AND shop_id = ? AND status = 'pending'", c.Param("id"), shopID).
+		Update("status", "draft")
+	if result.RowsAffected == 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "order not found or not in pending status"})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"message": "withdrawn"})
+}