feat: 新增甲方客户管理模块及配套功能

1. 新增甲方客户CRUD接口、前端页面与权限控制
2. 新增发货单管理模块，包含订单状态流转
3. 修复系统菜单名称乱码问题
4. 新增项目启动脚本与数据库初始化脚本
5. 新增相关实体类、Mapper、Service实现
6. 补充项目设计文档与忽略配置

sql/fix_menu_garbled.sql

@@ -0,0 +1,30 @@
+SET NAMES utf8mb4;
+
+-- 修复菜单名称乱码问题
+-- 根据截图中显示的权限字符，还原正确的菜单名称
+
+-- 订单管理相关菜单
+UPDATE sys_menu SET menu_name = '订单管理' WHERE perms = 'bid:order:list' AND menu_name LIKE '%璁㈠%';
+UPDATE sys_menu SET menu_name = '待发订单' WHERE perms = 'bid:order:pending' AND menu_name LIKE '%寰%';
+UPDATE sys_menu SET menu_name = '在途订单' WHERE perms = 'bid:order:transit' AND menu_name LIKE '%鍦ㄩ%';
+UPDATE sys_menu SET menu_name = '历史订单' WHERE perms = 'bid:order:history' AND menu_name LIKE '%鍘嗗彶%';
+UPDATE sys_menu SET menu_name = '结单时间' WHERE perms = 'bid:order:closeDate' AND menu_name LIKE '%缁撳崟%';
+
+-- 甲方客户管理
+UPDATE sys_menu SET menu_name = '甲方客户' WHERE perms = 'bid:client:list' AND menu_name LIKE '%鐢插彛%';
+
+-- 操作记录
+UPDATE sys_menu SET menu_name = '操作记录' WHERE perms = 'bid:operationlog:list' AND menu_name LIKE '%鎿嶄綔%';
+UPDATE sys_menu SET menu_name = '查询' WHERE perms = 'bid:operationlog:query' AND menu_name LIKE '%鏌ヨ%';
+
+-- 如果上述更新没有匹配到，使用menu_id直接更新（根据截图中的排序号判断）
+-- 订单管理目录（排序号10）
+UPDATE sys_menu SET menu_name = '订单管理' WHERE menu_id IN (
+    SELECT menu_id FROM (SELECT menu_id FROM sys_menu WHERE parent_id = 0 AND order_num = 10) AS t
+);
+
+-- 查询更新结果
+SELECT menu_id, menu_name, perms, order_num 
+FROM sys_menu 
+WHERE perms LIKE 'bid:order:%' OR perms LIKE 'bid:client:%' OR perms LIKE 'bid:operationlog:%'
+ORDER BY menu_id;