fix(expert): 编辑保存失败 Updates:0 + 错误 toast 弹两次

两个根因:

1. 后端 Updates: 0
   - ExpertNew.vue (admin+manager) onSave 编辑分支里 delete payload.expertId
   - 后端 BizExpertMapper.updateByPrimaryKey 是 where expert_id = #{expertId}
   - 没有 expertId → WHERE 不匹配 → 0 updates → 抛 "操作失败" 500
   - 修复: 不再 delete expertId (后端 insert/update 都依赖该字段)

2. 前端操作失败弹两次
   - request.js 响应拦截器在 code != 200 时自动 ElMessage.error
   - onSave 的 catch 又 ElMessage.error 一次
   - 修复: 加 __silentError 请求配置项, 拦截器遇此 flag 不自动 toast
   - api/public.js bizAdd/bizUpdate 加第 3 参数 opts 透传给 request
   - ExpertNew.vue onSave 调用时传 __silentError: true, 由 catch 块按业务语义
     决定 黄警 (手机号重复) 还是 红错 (其它)

Co-Authored-By: Claude <noreply@anthropic.com>

ry-vue3/src/api/public.js

@@ -88,8 +88,9 @@ export const markMessageRead = (msgId) => request.put(`/business/message/read/${
 export const markAllMessagesRead = () => request.put('/business/message/readAll')
 
 export const bizGet = (entity, id) => request.get(`/business/${entity}/${id}`)
-export const bizAdd = (entity, data) => request.post(`/business/${entity}`, data)
-export const bizUpdate = (entity, data) => request.put(`/business/${entity}`, data)
+// opts 透传给 request (例如 { __silentError: true } 让拦截器不自动 toast, 由调用方控制)
+export const bizAdd = (entity, data, opts) => request.post(`/business/${entity}`, data, opts)
+export const bizUpdate = (entity, data, opts) => request.put(`/business/${entity}`, data, opts)
 export const bizDelete = (entity, ids) => request.delete(`/business/${entity}/${ids}`)
 
 // 人员批量导入 (unitType: 'sponsor' | 'executor')