feat: 更新分期方案初始化脚本，匹配最新表结构

- 更新表名和字段名为小写格式
- 修正字段类型以匹配实体类定义
- 新增缺失字段：scheme_type, down_payment_ratio等
- 添加索引优化查询性能
- 完善表和字段注释

LCXiaoguan-ui/src/api/system/client/index.ts

@@ -0,0 +1,80 @@
+import request from '@/utils/request';
+import { AxiosPromise } from 'axios';
+import { ClientVO, ClientForm, ClientQuery } from '@/api/system/client/types';
+
+/**
+ * 查询客户端管理列表
+ * @param query
+ * @returns {*}
+ */
+
+export const listClient = (query?: ClientQuery): AxiosPromise<ClientVO[]> => {
+  return request({
+    url: '/system/client/list',
+    method: 'get',
+    params: query
+  });
+};
+
+/**
+ * 查询客户端管理详细
+ * @param id
+ */
+export const getClient = (id: string | number): AxiosPromise<ClientVO> => {
+  return request({
+    url: '/system/client/' + id,
+    method: 'get'
+  });
+};
+
+/**
+ * 新增客户端管理
+ * @param data
+ */
+export const addClient = (data: ClientForm) => {
+  return request({
+    url: '/system/client',
+    method: 'post',
+    data: data
+  });
+};
+
+/**
+ * 修改客户端管理
+ * @param data
+ */
+export const updateClient = (data: ClientForm) => {
+  return request({
+    url: '/system/client',
+    method: 'put',
+    data: data
+  });
+};
+
+/**
+ * 删除客户端管理
+ * @param id
+ */
+export const delClient = (id: string | number | Array<string | number>) => {
+  return request({
+    url: '/system/client/' + id,
+    method: 'delete'
+  });
+};
+
+/**
+ * 状态修改
+ * @param clientId 客户端id
+ * @param status 状态
+ */
+export function changeStatus(clientId: string, status: string) {
+  const data = {
+    clientId,
+    status
+  };
+  return request({
+    url: '/system/client/changeStatus',
+    method: 'put',
+    data: data
+  });
+}