refactor(types): 重构类型系统，统一共享类型定义

feat(types): 新增共享类型中心，包含用户、产品、订单等核心领域类型
fix(types): 修复类型定义错误，统一各模块类型引用
style(types): 优化类型文件格式和注释
docs(types): 更新类型文档和变更日志
test(types): 添加类型测试用例
build(types): 配置类型共享路径
chore(types): 清理重复类型定义文件

dashboard/src/pages/Merchant/MerchantSettlementManage.tsx

@@ -9,7 +9,7 @@ const { RangePicker } = DatePicker;
 const { Item } = Form;
 
 const MerchantSettlementManage: React.FC = () => {
-  const [settlements, setSettlements] = useState<Settlement[]>([]);
+  const [settlements, setSettlements] = useState<MerchantSettlement[]>([]);
   const [merchants, setMerchants] = useState<{ id: string; companyName: string }[]>([]);
   const [loading, setLoading] = useState(false);
   const [searchText, setSearchText] = useState('');
@@ -17,7 +17,7 @@ const MerchantSettlementManage: React.FC = () => {
   const [statusFilter, setStatusFilter] = useState<string>('');
   const [dateRange, setDateRange] = useState<[string, string] | null>(null);
   const [isModalVisible, setIsModalVisible] = useState(false);
-  const [selectedSettlement, setSelectedSettlement] = useState<Settlement | null>(null);
+  const [selectedSettlement, setSelectedSettlement] = useState<MerchantSettlement | null>(null);
   const [form] = Form.useForm();
 
   const fetchSettlements = async () => {