站内消息支持三种类型，admin发送，mobile订阅

server/routes_io_messages.ts

@@ -132,6 +132,27 @@ export function setupMessageEvents({ socket , apiClient }:Variables) {
 
       await apiClient.database.table('user_messages').insert(userMessages);
 
+      // 根据消息类型推送到不同频道
+      const messageData = {
+        id: messageId,
+        title,
+        content,
+        type,
+        sender_id: user.id,
+        sender_name: user.username,
+        created_at: new Date().toISOString()
+      };
+
+      if (type === MessageType.SYSTEM) {
+        socket.to('system').emit('message:received', messageData);
+      } else if (type === MessageType.ANNOUNCE) {
+        socket.to('announce').emit('message:received', messageData);
+      } else if (type === MessageType.PRIVATE) {
+        receiver_ids.forEach(userId => {
+          socket.to(`user_${userId}`).emit('message:received', messageData);
+        });
+      }
+
       socket.emit('message:sent', {
         message: '消息发送成功',
         data: { id: messageId }