fix: 协议子资源单事务保存，并补齐样本编码/OA/质检等近期能力

锁定缴费校验失败时整单回滚，避免样本半成功落库；前端禁止删除锁定缴费样本，改码走更正编码。同步落地样本更正、采集微信通知、OA提及未读、细胞产品套餐与相关迁移文档。

Co-authored-by: Cursor <cursoragent@cursor.com>

web-admin/src/api/oaApproval.ts

@@ -488,6 +488,17 @@ export function fetchOaCcUnreadCount() {
   return request.get<{ count: number }>({ url: `${BASE}/tasks/cc/unread-count` })
 }
 
+export function fetchOaMentionUnreadCount() {
+  return request.get<{ count: number }>({ url: `${BASE}/mentions/unread-count` })
+}
+
+export function fetchMarkOaMentionRead(instanceId: string) {
+  return request.post({
+    url: `${BASE}/mentions/${instanceId}/read`,
+    showSuccessMessage: false
+  })
+}
+
 export function fetchMarkOaCcTaskRead(taskId: string) {
   return request.post({
     url: `${BASE}/tasks/${taskId}/read`,