♻️ refactor(classroom): 清理未使用的代码和类型定义

- 删除未使用的ImLogLevel和ImMessageLevel类型导入
- 移除未使用的ImGroupMessage接口定义
- 删除未使用的retryOperation、saveImMessageToDatabase和saveMessagesToDatabase函数
- 精简Im相关类型引用，只保留必要的类型定义

src/client/mobile/components/Classroom/useClassroom.ts

@@ -1,5 +1,5 @@
 import { useState, useEffect, useRef } from 'react';
-import { useParams, useSearchParams } from 'react-router';
+import { useParams } from 'react-router';
 // import { ClassroomAPI } from '../../api/index.ts';
 // @ts-types="../../../share/aliyun-rtc-sdk.d.ts"
 // @ts-types="./alivc-im.iife.d.ts"
@@ -17,8 +17,6 @@ export enum Role {
 type ImEngine = InstanceType<typeof AliVCInteraction.ImEngine>;
 type ImGroupManager = AliVCInteraction.AliVCIMGroupManager;
 type ImMessageManager = AliVCInteraction.AliVCIMMessageManager;
-type ImLogLevel = AliVCInteraction.ImLogLevel;
-type ImMessageLevel = AliVCInteraction.ImMessageLevel;
 const { ERROR } = AliVCInteraction.ImLogLevel;
 const { NORMAL, HIGH } = AliVCInteraction.ImMessageLevel;
 
@@ -27,14 +25,6 @@ interface ImUser {
   userExtension?: string;
 }
 
-interface ImGroupMessage {
-  groupId: string;
-  type: number;
-  data: string;
-  sender?: ImUser;
-  timestamp?: number;
-}
-
 // 互动消息类型
 enum InteractionAction {
   HandUp = 'hand_up',
@@ -197,63 +187,6 @@ export const useClassroom = ({ user }:{ user : User }) => {
     }
   };
 
-  // 重试操作函数
-  const retryOperation = async <T>(
-    operation: () => Promise<T>,
-    maxRetries = 3,
-    delay = 1000
-  ): Promise<T> => {
-    for (let i = 0; i < maxRetries; i++) {
-      try {
-        return await operation();
-      } catch (error) {
-        if (i === maxRetries - 1) throw error;
-        await new Promise(resolve => setTimeout(resolve, delay * (i + 1)));
-      }
-    }
-    throw new Error('Max retries exceeded');
-  };
-
-  // 保存IM消息到数据库（直接从IM消息对象创建）
-  const saveImMessageToDatabase = async (
-    msg: AliVCInteraction.ImMessage, 
-    type: 'text' | 'image' | 'system',
-    content: string,
-    senderName?: string
-  ): Promise<void> => {
-    if (!classId) return;
-    
-    try {
-      await chatMessageClient.$post({
-        json: {
-          classId,
-          type,
-          content,
-          senderId: msg.sender?.userId || null,
-          senderName: senderName || msg.sender?.userId || '系统',
-          timestamp: msg.timestamp || Date.now()
-        }
-      });
-    } catch (error) {
-      console.error('保存IM消息到数据库失败:', error);
-      // 静默失败，不影响用户体验
-    }
-  };
-
-  // 批量保存消息到数据库
-  const saveMessagesToDatabase = async (messages: Message[]): Promise<void> => {
-    if (!classId || messages.length === 0) return;
-    
-    try {
-      // 由于API只支持单条创建，这里逐条保存
-      for (const message of messages) {
-        await saveMessageToDatabase(message);
-      }
-    } catch (error) {
-      console.error('批量保存消息到数据库失败:', error);
-    }
-  };
-
   const showToast = (type: 'info' | 'success' | 'error', message: string): void => {
     if (type === 'info') {
       toast.info(message);
@@ -264,9 +197,6 @@ export const useClassroom = ({ user }:{ user : User }) => {
     }
   };
 
-
-
-
   // 事件监听函数
   const listenImEvents = (): void => {
     if (!imEngine.current) return;