fix: 修复TypeScript配置错误并更新项目文档

详细说明:
- 修复了@n8n/config包的TypeScript配置错误
- 移除了不存在的jest-expect-message类型引用
- 清理了所有TypeScript构建缓存
- 更新了可行性分析文档，添加了技术实施方案
- 更新了Agent prompt文档
- 添加了会展策划工作流文档
- 包含了n8n-chinese-translation子项目
- 添加了exhibition-demo展示系统框架

n8n-n8n-1.109.2/packages/@n8n/nodes-langchain/utils/N8nJsonLoader 2.ts

@@ -0,0 +1,90 @@
+import type { Document } from '@langchain/core/documents';
+import type { TextSplitter } from '@langchain/textsplitters';
+import { JSONLoader } from 'langchain/document_loaders/fs/json';
+import { TextLoader } from 'langchain/document_loaders/fs/text';
+import {
+	type IExecuteFunctions,
+	type INodeExecutionData,
+	type ISupplyDataFunctions,
+	NodeOperationError,
+} from 'n8n-workflow';
+
+import { getMetadataFiltersValues } from './helpers';
+
+export class N8nJsonLoader {
+	constructor(
+		private context: IExecuteFunctions | ISupplyDataFunctions,
+		private optionsPrefix = '',
+		private textSplitter?: TextSplitter,
+	) {}
+
+	async processAll(items?: INodeExecutionData[]): Promise<Document[]> {
+		const docs: Document[] = [];
+
+		if (!items) return [];
+
+		for (let itemIndex = 0; itemIndex < items.length; itemIndex++) {
+			const processedDocuments = await this.processItem(items[itemIndex], itemIndex);
+
+			docs.push(...processedDocuments);
+		}
+
+		return docs;
+	}
+
+	async processItem(item: INodeExecutionData, itemIndex: number): Promise<Document[]> {
+		const mode = this.context.getNodeParameter('jsonMode', itemIndex, 'allInputData') as
+			| 'allInputData'
+			| 'expressionData';
+
+		const pointers = this.context.getNodeParameter(
+			`${this.optionsPrefix}pointers`,
+			itemIndex,
+			'',
+		) as string;
+		const pointersArray = pointers.split(',').map((pointer) => pointer.trim());
+		const metadata = getMetadataFiltersValues(this.context, itemIndex) ?? [];
+
+		if (!item) return [];
+
+		let documentLoader: JSONLoader | TextLoader | null = null;
+
+		if (mode === 'allInputData') {
+			const itemString = JSON.stringify(item.json);
+			const itemBlob = new Blob([itemString], { type: 'application/json' });
+			documentLoader = new JSONLoader(itemBlob, pointersArray);
+		}
+
+		if (mode === 'expressionData') {
+			const dataString = this.context.getNodeParameter('jsonData', itemIndex) as string | object;
+			if (typeof dataString === 'object') {
+				const itemBlob = new Blob([JSON.stringify(dataString)], { type: 'application/json' });
+				documentLoader = new JSONLoader(itemBlob, pointersArray);
+			}
+
+			if (typeof dataString === 'string') {
+				const itemBlob = new Blob([dataString], { type: 'text/plain' });
+				documentLoader = new TextLoader(itemBlob);
+			}
+		}
+
+		if (documentLoader === null) {
+			// This should never happen
+			throw new NodeOperationError(this.context.getNode(), 'Document loader is not initialized');
+		}
+
+		const docs = this.textSplitter
+			? await this.textSplitter.splitDocuments(await documentLoader.load())
+			: await documentLoader.load();
+
+		if (metadata) {
+			docs.forEach((doc) => {
+				doc.metadata = {
+					...doc.metadata,
+					...metadata,
+				};
+			});
+		}
+		return docs;
+	}
+}