fix: 功能用例导入模块带空格导入失败

--bug=1009895 --user=陈建星 用附件的excel导入用例，提示node id为空，看了页面没有node id https://www.tapd.cn/55049933/s/1100397

backend/src/main/java/io/metersphere/service/NodeTreeService.java

@@ -170,7 +170,7 @@ public class NodeTreeService<T extends TreeNodeDTO> {
 
         path.append("/" + nodeName);
 
-        String pid = null;
+        String pid;
         //创建过不创建
         if (pathMap.get(path.toString()) != null) {
             pid = pathMap.get(path.toString());

backend/src/main/java/io/metersphere/track/service/TestCaseNodeService.java

@@ -405,7 +405,7 @@ public class TestCaseNodeService extends NodeTreeService<TestCaseNodeDTO> {
             List<String> nodeNameList = new ArrayList<>(Arrays.asList(item.split("/")));
             Iterator<String> itemIterator = nodeNameList.iterator();
             Boolean hasNode = false;
-            String rootNodeName = null;
+            String rootNodeName;
 
             if (nodeNameList.size() <= 1) {
                 throw new ExcelException(Translator.get("test_case_create_module_fail") + ":" + item);

backend/src/main/java/io/metersphere/track/service/TestCaseService.java

@@ -937,6 +937,17 @@ public class TestCaseService {
                     testCase.setCreateUser(SessionUtils.getUserId());
                     testCase.setCreateTime(System.currentTimeMillis());
                     testCase.setUpdateTime(System.currentTimeMillis());
+                    if (StringUtils.isNotBlank(testCase.getNodePath())) {
+                        String[] modules = testCase.getNodePath().split("/");
+                        StringBuilder path = new StringBuilder();
+                        for (String module : modules) {
+                            if (StringUtils.isNotBlank(module)) {
+                                path.append("/");
+                                path.append(module.trim());
+                            }
+                        }
+                        testCase.setNodePath(path.toString());
+                    }
                     testCase.setNodeId(nodePathMap.get(testCase.getNodePath()));
                     testCase.setNum(num);
                     if (project.getCustomNum() && StringUtils.isBlank(testCase.getCustomNum())) {