refactor: 重构项目结构并优化类型定义

- 移除extension模块，将功能迁移至node-agent
- 修复类型导出问题，使用export type明确类型导出
- 统一数据库连接方式，从直接导入改为使用config/database
- 更新文档中的项目结构描述
- 添加多个服务的实用方法，如getForecast、getBalances等
- 修复类型错误和TS1205警告
- 优化RedisService调用方式
- 添加新的实体类型定义
- 更新审计日志格式，统一字段命名

dashboard/src/pages/B2BTrade/BatchOrder.tsx

@@ -127,7 +127,7 @@ export const B2BTradeBatchOrder: React.FC = () => {
 
   const parseUploadedFile = async (file: any) => {
     try {
-      const items = await b2bTradeDataSource.parseOrderFile(file, selectedCustomer);
+      const items = await b2bTradeDataSource.parseUploadFile(file, selectedCustomer?.id || '');
       setOrderItems(items);
       setCurrentStep(1);
       message.success('File parsed successfully');
@@ -143,9 +143,11 @@ export const B2BTradeBatchOrder: React.FC = () => {
   const handleValidateItems = async () => {
     setLoading(true);
     try {
-      const result = await b2bTradeDataSource.validateOrderItems(orderItems);
-      setOrderItems(result.items);
-      message.success(`Validation complete: ${result.validCount} valid, ${result.invalidCount} invalid`);
+      const result = await b2bTradeDataSource.validateItems(orderItems);
+      setOrderItems(result);
+      const validCount = result.filter(i => i.status === 'VALID').length;
+      const invalidCount = result.filter(i => i.status === 'INVALID').length;
+      message.success(`Validation complete: ${validCount} valid, ${invalidCount} invalid`);
     } catch (error) {
       message.error('Validation failed');
     } finally {
@@ -163,10 +165,9 @@ export const B2BTradeBatchOrder: React.FC = () => {
       }
 
       setLoading(true);
-      await b2bTradeDataSource.submitBatchOrder({
+      await b2bTradeDataSource.createBatchOrder({
         customerId: values.customerId,
         items: validItems,
-        note: values.note,
       });
 
       message.success('Batch order submitted successfully');

dashboard/src/pages/B2BTrade/ContractManage.tsx

@@ -3,6 +3,7 @@ import {
   Card,
   Form,
   Input,
+  InputNumber,
   Select,
   Button,
   Table,
@@ -132,6 +133,7 @@ export const ContractManage: React.FC = () => {
           status: 'ACTIVE',
           startDate: '2026-01-01',
           endDate: '2026-12-31',
+          totalAmount: 500000.00,
           totalValue: 500000.00,
           currency: 'USD',
           signedDate: '2025-12-15',
@@ -151,6 +153,7 @@ export const ContractManage: React.FC = () => {
           status: 'ACTIVE',
           startDate: '2026-02-01',
           endDate: '2028-01-31',
+          totalAmount: 0,
           totalValue: 0,
           currency: 'USD',
           signedDate: '2026-01-20',
@@ -167,9 +170,10 @@ export const ContractManage: React.FC = () => {
           customerName: 'Global Import Inc.',
           title: 'Purchase Agreement Q2',
           type: 'PURCHASE',
-          status: 'PENDING_SIGN',
+          status: 'PENDING_REVIEW',
           startDate: '2026-04-01',
           endDate: '2026-06-30',
+          totalAmount: 150000.00,
           totalValue: 150000.00,
           currency: 'USD',
           attachments: ['purchase_agreement.pdf'],
@@ -187,6 +191,7 @@ export const ContractManage: React.FC = () => {
           status: 'EXPIRED',
           startDate: '2025-01-01',
           endDate: '2025-12-31',
+          totalAmount: 350000.00,
           totalValue: 350000.00,
           currency: 'USD',
           signedDate: '2025-01-05',
@@ -661,7 +666,7 @@ export const ContractManage: React.FC = () => {
                 </Tag>
               </Descriptions.Item>
               <Descriptions.Item label="Value">
-                {selectedContract.totalValue > 0 ? `$${selectedContract.totalValue.toLocaleString()}` : '-'}
+                {selectedContract.totalValue != null ? `$${selectedContract.totalValue.toLocaleString()}` : '-'}
               </Descriptions.Item>
               <Descriptions.Item label="Start Date">{selectedContract.startDate}</Descriptions.Item>
               <Descriptions.Item label="End Date">{selectedContract.endDate}</Descriptions.Item>
@@ -675,11 +680,11 @@ export const ContractManage: React.FC = () => {
               <Descriptions.Item label="Updated">{selectedContract.updatedAt}</Descriptions.Item>
             </Descriptions>
 
-            {selectedContract.attachments.length > 0 && (
+            {selectedContract.attachments && selectedContract.attachments.length > 0 && (
               <>
                 <Divider>Attachments</Divider>
                 <Space>
-                  {selectedContract.attachments.map((file, index) => (
+                  {selectedContract.attachments.map((file: string, index: number) => (
                     <Button
                       key={index}
                       icon={<DownloadOutlined />}