refactor(pricing): 重构自动发券服务方法命名及逻辑

- 将 autoGrantFirstPrintCoupon 方法重命名为 autoGrantCoupon
- 修改 findFirstPrintCouponId 方法名为 findFirstCouponId
- 调整优惠券名称匹配逻辑，移除对"first"关键字的检查
- 更新调用方 PrinterServiceImpl 中的方法引用
- 优化自动发券异常处理，确保不影响主流程

src/main/java/com/ycwl/basic/service/printer/impl/PrinterServiceImpl.java

@@ -441,6 +441,20 @@ public class PrinterServiceImpl implements PrinterService {
 
         request.setProducts(productItems);
 
+        if (mobileCount > 0) {
+            try {
+                autoCouponService.autoGrantCoupon(
+                        memberId,
+                        faceId,
+                        scenicId,
+                        ProductType.PHOTO_PRINT_MU
+                );
+            } catch (Exception e) {
+                log.warn("自动发券失败，不影响下单流程: memberId={}, faceId={}, scenicId={}, error={}",
+                        memberId, faceId, scenicId, e.getMessage());
+            }
+        }
+
         // 使用统一价格计算服务
         PriceCalculationResult result = priceCalculationService.calculatePrice(request);
 
@@ -589,21 +603,6 @@ public class PrinterServiceImpl implements PrinterService {
             throw new BaseException("没有可打印的照片");
         }
 
-        // 【新增】检测并自动发放首次打印优惠券
-        if (mobileCount > 0) {
-            try {
-                autoCouponService.autoGrantFirstPrintCoupon(
-                    memberId,
-                    faceId,
-                    scenicId,
-                    ProductType.PHOTO_PRINT_MU
-                );
-            } catch (Exception e) {
-                log.warn("自动发券失败，不影响下单流程: memberId={}, faceId={}, scenicId={}, error={}",
-                    memberId, faceId, scenicId, e.getMessage());
-            }
-        }
-
         OrderEntity order = new OrderEntity();
         Long orderId = SnowFlakeUtil.getLongId();
         redisTemplate.opsForValue().set("printer_size:"+orderId, printer.getPreferPaper(), 60, TimeUnit.SECONDS);