fix: 展示 JavaScript 代码节点执行错误

- 配置脚本执行超时并保留可定位的 JavaScript 异常信息

- 在试运行步骤和终态结果中展示并展开失败节点

easyflow-modules/easyflow-module-ai/src/test/java/tech/easyflow/ai/config/JavascriptCodeEnginePropsTest.java

@@ -0,0 +1,49 @@
+package tech.easyflow.ai.config;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * JavaScript 代码执行引擎配置测试。
+ */
+public class JavascriptCodeEnginePropsTest {
+
+    /**
+     * 验证正数超时配置可以正常写入。
+     */
+    @Test
+    public void shouldAcceptPositiveTimeout() {
+        JavascriptCodeEngineProps props =
+                new JavascriptCodeEngineProps();
+
+        props.setTimeoutMs(1000L);
+
+        Assert.assertEquals(1000L, props.getTimeoutMs());
+    }
+
+    /**
+     * 验证非正数超时配置会立即失败。
+     */
+    @Test
+    public void shouldRejectNonPositiveTimeout() {
+        assertInvalidTimeout(0L);
+        assertInvalidTimeout(-1L);
+    }
+
+    /**
+     * 验证指定超时值无法写入配置。
+     *
+     * @param timeoutMs 非法超时值
+     */
+    private void assertInvalidTimeout(long timeoutMs) {
+        JavascriptCodeEngineProps props =
+                new JavascriptCodeEngineProps();
+        try {
+            props.setTimeoutMs(timeoutMs);
+            Assert.fail("非正数超时配置应执行失败");
+        } catch (IllegalArgumentException exception) {
+            Assert.assertTrue(exception.getMessage().contains(
+                    "必须大于 0"));
+        }
+    }
+}

easyflow-modules/easyflow-module-ai/src/test/java/tech/easyflow/ai/easyagentsflow/service/TinyFlowServiceTest.java

@@ -2,11 +2,13 @@ package tech.easyflow.ai.easyagentsflow.service;
 
 import com.easyagents.flow.core.chain.ChainState;
 import com.easyagents.flow.core.chain.ChainStatus;
+import com.easyagents.flow.core.chain.ExceptionSummary;
 import com.easyagents.flow.core.chain.NodeState;
 import com.easyagents.flow.core.chain.NodeStatus;
 import com.easyagents.flow.core.chain.repository.ChainStateRepository;
 import com.easyagents.flow.core.chain.repository.NodeStateRepository;
 import com.easyagents.flow.core.chain.runtime.ChainExecutor;
+import com.easyagents.flow.core.code.impl.JavascriptExecutionException;
 import org.junit.Assert;
 import org.junit.Test;
 import tech.easyflow.ai.easyagentsflow.entity.ChainInfo;
@@ -137,6 +139,50 @@ public class TinyFlowServiceTest {
                 .load(EXECUTE_ID, NODE_ID);
     }
 
+    /**
+     * 验证 JavaScript 执行错误使用面向试运行用户的定位信息。
+     *
+     * @throws Exception 测试依赖注入失败时抛出
+     */
+    @Test
+    public void shouldExposeJavascriptExecutionMessage()
+            throws Exception {
+        ChainExecutor chainExecutor = mock(ChainExecutor.class);
+        ChainStateRepository chainStateRepository =
+                mock(ChainStateRepository.class);
+        NodeStateRepository nodeStateRepository =
+                mock(NodeStateRepository.class);
+        String message =
+                "JavaScript 语法错误（第 2 行，第 3 列）：Unexpected token";
+        ExceptionSummary error = new ExceptionSummary(
+                new JavascriptExecutionException(
+                        message,
+                        new IllegalArgumentException("raw parser error")));
+        ChainState chainState = new ChainState();
+        chainState.setStatus(ChainStatus.FAILED);
+        chainState.setError(error);
+        NodeState nodeState = new NodeState();
+        nodeState.setStatus(NodeStatus.FAILED);
+        nodeState.setError(error);
+        when(chainExecutor.getChainStateRepository())
+                .thenReturn(chainStateRepository);
+        when(chainExecutor.getNodeStateRepository())
+                .thenReturn(nodeStateRepository);
+        when(chainStateRepository.load(EXECUTE_ID))
+                .thenReturn(chainState);
+        when(nodeStateRepository.load(EXECUTE_ID, NODE_ID))
+                .thenReturn(nodeState);
+        TinyFlowService service = service(chainExecutor);
+
+        ChainInfo result = service.getChainStatus(
+                EXECUTE_ID, List.of(node(NodeStatus.READY)));
+
+        Assert.assertEquals(message, result.getMessage());
+        Assert.assertEquals(
+                message,
+                result.getNodes().get(NODE_ID).getMessage());
+    }
+
     /**
      * 创建带指定初始状态的设计器节点。
      *