fix(接口测试): 修复接口定义body参数使用内置函数提示参数报错的缺陷

https://github.com/metersphere/metersphere/issues/21106
https://github.com/metersphere/metersphere/issues/21104

api-test/backend/src/main/java/io/metersphere/commons/utils/JSONUtil.java

@@ -243,7 +243,11 @@ public class JSONUtil {
 
     public static String parser(String content) {
         try {
-            Gson gson = new GsonBuilder().setPrettyPrinting().serializeNulls().create();
+            Gson gson = new GsonBuilder()
+                    .setPrettyPrinting()
+                    .disableHtmlEscaping()
+                    .serializeNulls()
+                    .create();
             return gson.toJson(JsonParser.parseString(content).getAsJsonObject());
         } catch (Exception e) {
             return content;

api-test/frontend/src/business/commons/json-schema/schema/editor/main.vue

@@ -275,7 +275,7 @@
         </div>
       </el-form>
       <p class="tip">{{ $t('schema.preview') }}</p>
-      <pre style="width: 100%">{{ completeNodeValue }}</pre>
+      <pre style="width: 100%; white-space: pre-wrap;">{{ completeNodeValue }}</pre>
 
       <span slot="footer" class="dialog-footer">
         <ms-dialog-footer @cancel="modalVisible = false" @confirm="handleOk" />