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-ui-admin/packages/tinyflow-ui/src/components/utils/startNodeParameterLabel.ts

@@ -0,0 +1,22 @@
+import type { Parameter } from '#types';
+
+/**
+ * 解析开始节点参数在引用选择器中的展示名。
+ *
+ * 系统主问题字段始终保持“用户问题”口径；普通自定义字段优先展示参数名，
+ * 避免文件类型字段退化为默认“文件字段”标签。
+ */
+export const getStartNodeParameterLabel = (parameter: Parameter) => {
+  const name = String(parameter?.name || '').trim();
+  if (name === 'user_input') {
+    return (
+      String(parameter?.formLabel || parameter?.displayName || '用户问题').trim()
+      || '用户问题'
+    );
+  }
+  return (
+    name
+    || String(parameter?.formLabel || parameter?.displayName || '参数').trim()
+    || '参数'
+  );
+};

easyflow-ui-admin/packages/tinyflow-ui/src/components/utils/useRefOptions.svelte.ts

@@ -1,6 +1,7 @@
 import { type Edge, type Node, useNodesData, useStore } from '@xyflow/svelte';
 import type { Parameter } from '#types';
 import { getCurrentNodeId, getOptions } from '#components/utils/NodeUtils';
+import { getStartNodeParameterLabel } from '#components/utils/startNodeParameterLabel';
 import { nodeIcons } from '../../consts';
 
 const fillRefNodeIds = (
@@ -21,24 +22,39 @@ const getChildren = (
   parentId: string,
   nodeIsChildren: boolean,
   nodeType: string,
+  parentPathLabel = '',
+  parentIsCollection = false,
 ) => {
   if (!params || params.length === 0) return [];
   return params.map((param: any) => {
+    const isCollection = param.dataType === 'Array' && param.children && param.children.length > 0;
+    const childBaseLabel = param.formLabel || param.displayName || param.name;
+    const normalizedChildLabel = String(childBaseLabel || '').trim();
+    const pathLabel = !parentPathLabel
+      ? normalizedChildLabel
+      : parentIsCollection
+        ? `${parentPathLabel}.[].${normalizedChildLabel}`
+        : `${parentPathLabel}.${normalizedChildLabel}`;
     const dataType = nodeIsChildren
       ? `Array<${param.dataType || 'String'}>`
       : param.dataType || 'String';
-    const label = param.formLabel || param.displayName || param.name;
     return {
-      label,
+      label: pathLabel,
       dataType: dataType,
       value: parentId + '.' + param.name,
       selectable: true,
       nodeType: nodeType,
+      displayLabel: pathLabel,
+      pathLabel,
+      itemTypeLabel: parentIsCollection ? '数组项字段' : undefined,
+      isCollection,
       children: getChildren(
         param.children,
         parentId + '.' + param.name,
         nodeIsChildren,
         nodeType,
+        pathLabel,
+        isCollection,
       ),
     };
   });
@@ -72,8 +88,7 @@ const nodeToOptions = (
         const dataType = nodeIsChildren
           ? `Array<${parameter.dataType || 'String'}>`
           : parameter.dataType || 'String';
-        const label =
-          parameter.formLabel || parameter.displayName || parameter.name;
+        const label = getStartNodeParameterLabel(parameter);
         children.push({
           label,
           dataType: dataType,