feat:(feature/REQ-3342) 兼容菜单组件跟前端资源关联关系在，但是前端资源已经不存在的场景

tyr-server/src/main/java/cn/axzo/tyr/server/service/impl/SaasFeatureResourceServiceImpl.java

@@ -408,6 +408,8 @@ public class SaasFeatureResourceServiceImpl extends ServiceImpl<SaasFeatureResou
         Optional<PageElementResp> pageElementOptional = saasPageElementFeatureResourceRelationService.list(pageElementFeatureResourceRelationReq)
                 .stream()
                 .map(PageElementFeatureResourceRelationResp::getPageElement)
+                // 兼容菜单组件跟前端资源关联关系在，但是前端资源已经不存在的场景
+                .filter(Objects::nonNull)
                 .findFirst();
 
         if (!pageElementOptional.isPresent()) {