feat: 完成工作流多文件文档解析闭环

- 支持文档解析节点批量解析并收口为 documents 轻量输出

- 收口引用树、节点输出展示与旧工作流固定输出兼容

- 修复共享按钮点击事件，恢复多个节点加号交互

easyflow-modules/easyflow-module-ai/src/test/java/tech/easyflow/ai/node/DocNodeFileContentExtractorTest.java

@@ -16,7 +16,9 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.InetSocketAddress;
 import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import com.sun.net.httpserver.HttpServer;
 
@@ -211,6 +213,56 @@ public class DocNodeFileContentExtractorTest {
         }
     }
 
+    /**
+     * 验证多文件输入会按顺序返回逐文件结果。
+     */
+    @Test
+    public void shouldExtractDocumentsForMultipleFiles() {
+        RecordingDocumentParseBridgeService bridgeService = new RecordingDocumentParseBridgeService();
+        DocNodeFileContentExtractor extractor = new DocNodeFileContentExtractor(
+            bridgeService,
+            new FakeFileStorageService(),
+            new FakeReaderManager("plain text")
+        );
+
+        List<DocNodeFileContentExtractor.DocExtractedDocument> documents = extractor.extractDocuments(Arrays.asList(
+            buildFileValue("demo.pdf", "/files/demo.pdf", "application/pdf"),
+            buildFileValue("note.txt", "/files/note.txt", "text/plain")
+        ));
+
+        Assert.assertEquals(2, documents.size());
+        Assert.assertEquals("demo.pdf", documents.get(0).getFileName());
+        Assert.assertEquals("# parsed", documents.get(0).getContent());
+        Assert.assertEquals("note.txt", documents.get(1).getFileName());
+        Assert.assertEquals("plain text", documents.get(1).getContent());
+    }
+
+    /**
+     * 验证多文件中任一文件失败时会暴露文件名。
+     */
+    @Test
+    public void shouldExposeFileNameWhenMultipleDocumentsFail() {
+        RecordingDocumentParseBridgeService bridgeService = new RecordingDocumentParseBridgeService();
+        bridgeService.response.setPreferredText(null);
+        bridgeService.response.setMarkdown(null);
+        bridgeService.response.setPlainText(null);
+        DocNodeFileContentExtractor extractor = new DocNodeFileContentExtractor(
+            bridgeService,
+            new FakeFileStorageService(),
+            new FakeReaderManager("plain text")
+        );
+
+        try {
+            extractor.extractDocuments(Arrays.asList(
+                buildFileValue("broken.pdf", "/files/broken.pdf", "application/pdf"),
+                buildFileValue("note.txt", "/files/note.txt", "text/plain")
+            ));
+            Assert.fail("expected BusinessException");
+        } catch (BusinessException e) {
+            Assert.assertEquals("文件解析失败(broken.pdf): 文档解析结果为空", e.getMessage());
+        }
+    }
+
     private Map<String, Object> buildFileValue(String fileName, String filePath, String contentType) {
         Map<String, Object> value = new HashMap<String, Object>();
         value.put("fileName", fileName);

easyflow-modules/easyflow-module-ai/src/test/java/tech/easyflow/ai/node/DocNodeTest.java

@@ -0,0 +1,40 @@
+package tech.easyflow.ai.node;
+
+import com.easyagents.flow.core.chain.Parameter;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.Map;
+
+/**
+ * {@link DocNode} 单元测试。
+ */
+public class DocNodeTest {
+
+    /**
+     * 历史工作流若改过输出名，仍应按固定输出槽位顺序映射运行态结果键。
+     *
+     * @throws Exception 反射调用失败
+     */
+    @Test
+    public void shouldResolveOutputKeyMappingByOutputOrder() throws Exception {
+        DocNode node = new DocNode();
+        node.setOutputDefs(Arrays.asList(
+                parameter("documentItems")
+        ));
+
+        Method method = DocNode.class.getDeclaredMethod("resolveOutputKeyMapping");
+        method.setAccessible(true);
+        Map<String, String> mapping = (Map<String, String>) method.invoke(node);
+
+        Assert.assertEquals("documentItems", mapping.get("documents"));
+    }
+
+    private static Parameter parameter(String name) {
+        Parameter parameter = new Parameter();
+        parameter.setName(name);
+        return parameter;
+    }
+}