R23-1/R23-2/R23-4：完成项目沟通回填与收口治理后端

server/src/services/notifications/imEnqueue.js

@@ -85,8 +85,9 @@ function redactImMessage(config, payload) {
   }
 
   if (effectiveType === 'project') {
+    const genericTitle = rawTitle.includes('收口') ? '有项目待收口' : '有项目待跟进';
     return {
-      title: rawTitle || '项目待处理事项',
+      title: genericTitle,
       body: '',
     };
   }