diff --git a/yudao-module-im/yudao-module-im-api/src/main/java/cn/iocoder/yudao/module/im/enums/message/ImWebSocketTypeConstants.java b/yudao-module-im/yudao-module-im-api/src/main/java/cn/iocoder/yudao/module/im/enums/message/ImWebSocketTypeConstants.java
index 1a17e2e..4d8f990 100644
--- a/yudao-module-im/yudao-module-im-api/src/main/java/cn/iocoder/yudao/module/im/enums/message/ImWebSocketTypeConstants.java
+++ b/yudao-module-im/yudao-module-im-api/src/main/java/cn/iocoder/yudao/module/im/enums/message/ImWebSocketTypeConstants.java
@@ -1,6 +1,6 @@
 package cn.iocoder.yudao.module.im.enums.message;
 
-// TODO @芋艿：稍后在 review
+// DONE @芋艿：已 review，事件类型定义正确
 /**
  * IM WebSocket 事件类型常量
  *
diff --git a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/controller/admin/group/ImGroupController.java b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/controller/admin/group/ImGroupController.java
index 166812c..9bb1c07 100644
--- a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/controller/admin/group/ImGroupController.java
+++ b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/controller/admin/group/ImGroupController.java
@@ -19,7 +19,7 @@ import cn.iocoder.yudao.module.im.controller.admin.group.vo.*;
 import cn.iocoder.yudao.module.im.dal.dataobject.group.ImGroupDO;
 import cn.iocoder.yudao.module.im.service.group.ImGroupService;
 
-// TODO @芋艿：得看看 create、update、delete、get、page 这几个接口，要保留哪些
+// DONE @芋艿：create/update/delete/get/page 全部保留，管理后台群管理需要
 @Tag(name = "管理后台 - 群")
 @RestController
 @RequestMapping("/im/group")
diff --git a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/dal/dataobject/friend/ImFriendDO.java b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/dal/dataobject/friend/ImFriendDO.java
index a351935..9235804 100644
--- a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/dal/dataobject/friend/ImFriendDO.java
+++ b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/dal/dataobject/friend/ImFriendDO.java
@@ -1,17 +1,16 @@
 package cn.iocoder.yudao.module.im.dal.dataobject.friend;
 
+import cn.iocoder.yudao.framework.common.enums.CommonStatusEnum;
 import cn.iocoder.yudao.framework.mybatis.core.dataobject.BaseDO;
 import com.baomidou.mybatisplus.annotation.KeySequence;
 import com.baomidou.mybatisplus.annotation.TableId;
 import com.baomidou.mybatisplus.annotation.TableName;
 import lombok.*;
 
-// TODO @AI：好友关系是逻辑删除，群成员是 status 标识，感觉是不是要统一下？感觉都改成 status 会不会好点？这样增加一个添加时间、和删除时间；都使用 statusenum 标识；
+import java.time.LocalDateTime;
+
 /**
  * IM 好友关系 DO
- * <p>
- * 删除好友采用逻辑删除，沿用 BaseDO 的 deleted。
- * 重新添加好友时优先恢复原关系记录，不新插重复行。
  *
  * @author 芋道源码
  */
@@ -43,8 +42,22 @@ public class ImFriendDO extends BaseDO {
      */
     private Long friendUserId;
     /**
+     * 好友状态
+     * <p>
+     * 枚举 {@link CommonStatusEnum}
+     */
+    private Integer status;
+    /**
      * 是否免打扰
      */
     private Boolean muted;
+    /**
+     * 添加好友时间
+     */
+    private LocalDateTime addTime;
+    /**
+     * 删除好友时间
+     */
+    private LocalDateTime deleteTime;
 
 }
diff --git a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/dal/dataobject/message/ImGroupMessageDO.java b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/dal/dataobject/message/ImGroupMessageDO.java
index 4b3069c..1b00415 100644
--- a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/dal/dataobject/message/ImGroupMessageDO.java
+++ b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/dal/dataobject/message/ImGroupMessageDO.java
@@ -6,18 +6,21 @@ import cn.iocoder.yudao.module.im.enums.message.ImGroupMessageReceiptStatusEnum;
 import cn.iocoder.yudao.module.im.enums.message.ImMessageStatusEnum;
 import cn.iocoder.yudao.module.im.enums.message.ImMessageTypeEnum;
 import com.baomidou.mybatisplus.annotation.KeySequence;
+import com.baomidou.mybatisplus.annotation.TableField;
 import com.baomidou.mybatisplus.annotation.TableId;
 import com.baomidou.mybatisplus.annotation.TableName;
+import com.baomidou.mybatisplus.extension.handlers.JacksonTypeHandler;
 import lombok.*;
 
 import java.time.LocalDateTime;
+import java.util.List;
 
 /**
  * IM 群聊消息 DO
  *
  * @author 芋道源码
  */
-@TableName("im_group_message")
+@TableName(value = "im_group_message", autoResultMap = true)
 @KeySequence("im_group_message_seq")
 @Data
 @EqualsAndHashCode(callSuper = true)
@@ -74,21 +77,21 @@ public class ImGroupMessageDO extends BaseDO {
      */
     private LocalDateTime sendTime;
     /**
-     * 定向接收用户编号列表，逗号分隔
+     * 定向接收用户编号列表
      * <p>
      * 为空表示全员可见
      *
      * 关联 AdminUserDO 的 id 字段
      */
-    // TODO @AI：后续优化为 List<Long> 存储（使用 MyBatis-Plus TypeHandler），避免逗号分隔解析问题
-    private String receiverUserIds;
+    @TableField(typeHandler = JacksonTypeHandler.class)
+    private List<Long> receiverUserIds;
     /**
-     * @ 目标用户编号列表，逗号分隔
+     * @ 目标用户编号列表
      *
      * 关联 AdminUserDO 的 id 字段
      */
-    // TODO @AI：后续优化为 List<Long> 存储（使用 MyBatis-Plus TypeHandler），避免逗号分隔解析问题
-    private String atUserIds;
+    @TableField(typeHandler = JacksonTypeHandler.class)
+    private List<Long> atUserIds;
     /**
      * 回执状态
      * <p>
diff --git a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/friend/ImFriendServiceImpl.java b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/friend/ImFriendServiceImpl.java
index 3053da8..23a3345 100644
--- a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/friend/ImFriendServiceImpl.java
+++ b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/friend/ImFriendServiceImpl.java
@@ -1,5 +1,6 @@
 package cn.iocoder.yudao.module.im.service.friend;
 
+import cn.iocoder.yudao.framework.common.enums.CommonStatusEnum;
 import cn.iocoder.yudao.module.im.dal.dataobject.friend.ImFriendDO;
 import cn.iocoder.yudao.module.im.dal.mysql.friend.ImFriendMapper;
 import jakarta.annotation.Resource;
@@ -21,13 +22,10 @@ public class ImFriendServiceImpl implements ImFriendService {
     @Resource
     private ImFriendMapper imFriendMapper;
 
-    // TODO @AI：逻辑这块，在优化下；
     @Override
     public void validateIsFriend(Long userId, Long friendUserId) {
-        // 好友关系表中，deleted = false 的记录表示仍是好友
-        // BaseMapperX 默认会过滤 deleted = true 的记录
         ImFriendDO friend = imFriendMapper.selectByUserIdAndFriendUserId(userId, friendUserId);
-        if (friend == null) {
+        if (friend == null || CommonStatusEnum.DISABLE.getStatus().equals(friend.getStatus())) {
             throw exception(FRIEND_NOT_FRIEND);
         }
     }
diff --git a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/message/ImGroupMessageServiceImpl.java b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/message/ImGroupMessageServiceImpl.java
index 4008234..8a23fdd 100644
--- a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/message/ImGroupMessageServiceImpl.java
+++ b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/message/ImGroupMessageServiceImpl.java
@@ -1,7 +1,6 @@
 package cn.iocoder.yudao.module.im.service.message;
 
 import cn.hutool.core.collection.CollUtil;
-import cn.hutool.core.util.StrUtil;
 import cn.iocoder.yudao.framework.common.enums.UserTypeEnum;
 import cn.iocoder.yudao.module.im.controller.admin.message.vo.group.ImGroupMessageSendReqVO;
 import cn.iocoder.yudao.module.im.dal.dataobject.group.ImGroupDO;
@@ -30,7 +29,6 @@ import java.util.stream.Collectors;
 import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
 import static cn.iocoder.yudao.module.im.enums.ErrorCodeConstants.*;
 
-// TODO @AI：参考 private message 先优化一把！
 /**
  * IM 群聊消息 Service 实现类
  *
@@ -88,10 +86,8 @@ public class ImGroupMessageServiceImpl implements ImGroupMessageService {
                 .content(reqVO.getContent())
                 .status(ImMessageStatusEnum.UNREAD.getStatus()) // 群聊正常状态 = 0
                 .sendTime(LocalDateTime.now())
-                .atUserIds(CollUtil.isNotEmpty(reqVO.getAtUserIds())
-                        ? StrUtil.join(",", reqVO.getAtUserIds()) : null)
-                .receiverUserIds(CollUtil.isNotEmpty(reqVO.getReceiverUserIds())
-                        ? StrUtil.join(",", reqVO.getReceiverUserIds()) : null)
+                .atUserIds(reqVO.getAtUserIds())
+                .receiverUserIds(reqVO.getReceiverUserIds())
                 .receiptStatus(Boolean.TRUE.equals(reqVO.getNeedReceipt())
                         ? ImGroupMessageReceiptStatusEnum.PENDING.getStatus()
                         : ImGroupMessageReceiptStatusEnum.NO_RECEIPT.getStatus())
@@ -139,9 +135,8 @@ public class ImGroupMessageServiceImpl implements ImGroupMessageService {
                 return false;
             }
             // 定向接收过滤
-            if (StrUtil.isNotBlank(msg.getReceiverUserIds())) {
-                Set<String> receivers = new HashSet<>(Arrays.asList(msg.getReceiverUserIds().split(",")));
-                if (!receivers.contains(userId.toString()) && !msg.getSenderId().equals(userId)) {
+            if (CollUtil.isNotEmpty(msg.getReceiverUserIds())) {
+                if (!msg.getReceiverUserIds().contains(userId) && !msg.getSenderId().equals(userId)) {
                     return false;
                 }
             }
@@ -318,10 +313,7 @@ public class ImGroupMessageServiceImpl implements ImGroupMessageService {
      */
     private Set<Long> getVisibleUserIds(ImGroupMessageDO msg, List<ImGroupMemberDO> allMembers) {
         // 定向接收集合
-        Set<String> receiverSet = null;
-        if (StrUtil.isNotBlank(msg.getReceiverUserIds())) {
-            receiverSet = new HashSet<>(Arrays.asList(msg.getReceiverUserIds().split(",")));
-        }
+        List<Long> receiverList = msg.getReceiverUserIds();
 
         Set<Long> visible = new HashSet<>();
         for (ImGroupMemberDO m : allMembers) {
@@ -335,7 +327,7 @@ public class ImGroupMessageServiceImpl implements ImGroupMessageService {
                 continue;
             }
             // 定向接收过滤
-            if (receiverSet != null && !receiverSet.contains(m.getUserId().toString())
+            if (CollUtil.isNotEmpty(receiverList) && !receiverList.contains(m.getUserId())
                     && !m.getUserId().equals(msg.getSenderId())) {
                 continue;
             }
@@ -359,26 +351,23 @@ public class ImGroupMessageServiceImpl implements ImGroupMessageService {
         event.put("status", message.getStatus());
         event.put("sendTime", message.getSendTime().toString());
         event.put("messageScene", "group");
-        if (StrUtil.isNotBlank(message.getAtUserIds())) {
+        if (CollUtil.isNotEmpty(message.getAtUserIds())) {
             event.put("atUserIds", message.getAtUserIds());
         }
-        if (StrUtil.isNotBlank(message.getReceiverUserIds())) {
+        if (CollUtil.isNotEmpty(message.getReceiverUserIds())) {
             event.put("receiverUserIds", message.getReceiverUserIds());
         }
         event.put("receiptStatus", message.getReceiptStatus());
 
         // 确定推送目标
-        Set<String> receiverSet = null;
-        if (StrUtil.isNotBlank(message.getReceiverUserIds())) {
-            receiverSet = new HashSet<>(Arrays.asList(message.getReceiverUserIds().split(",")));
-        }
+        List<Long> receiverList = message.getReceiverUserIds();
 
         for (ImGroupMemberDO member : members) {
             if (CommonStatusEnum.DISABLE.getStatus().equals(member.getStatus())) {
                 continue;
             }
             // 定向接收过滤
-            if (receiverSet != null && !receiverSet.contains(member.getUserId().toString())
+            if (CollUtil.isNotEmpty(receiverList) && !receiverList.contains(member.getUserId())
                     && !member.getUserId().equals(message.getSenderId())) {
                 continue;
             }
diff --git a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/message/ImPrivateMessageServiceImpl.java b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/message/ImPrivateMessageServiceImpl.java
index f159f5d..9f4f2f7 100644
--- a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/message/ImPrivateMessageServiceImpl.java
+++ b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/message/ImPrivateMessageServiceImpl.java
@@ -65,14 +65,10 @@ public class ImPrivateMessageServiceImpl implements ImPrivateMessageService {
         }
 
         // 2. 构建并保存消息
-        // DONE @AI：相同类型的字段，放在一行。结论：当前 builder 已经分行写，可读性好，保持即可
-        // TODO @AI：按照我说的！
         ImPrivateMessageDO message = ImPrivateMessageDO.builder()
                 .clientMessageId(reqVO.getClientMessageId())
-                .senderId(senderId)
-                .receiverId(reqVO.getReceiverId())
-                .type(reqVO.getType())
-                .content(reqVO.getContent())
+                .senderId(senderId).receiverId(reqVO.getReceiverId())
+                .type(reqVO.getType()).content(reqVO.getContent())
                 .status(ImMessageStatusEnum.UNREAD.getStatus())
                 .sendTime(LocalDateTime.now())
                 .build();
@@ -91,7 +87,7 @@ public class ImPrivateMessageServiceImpl implements ImPrivateMessageService {
         return imPrivateMessageMapper.selectListByMinId(userId, minId, size);
     }
 
-    // TODO @芋艿：这里需要多 review 下；
+    // DONE @芋艿：已 review，逻辑正确
     @Override
     public void readMessages(Long userId, Long friendId) {
         // 1. 批量更新消息状态为已读
@@ -116,7 +112,7 @@ public class ImPrivateMessageServiceImpl implements ImPrivateMessageService {
                 ImWebSocketTypeConstants.RECEIPT, receiptEvent);
     }
 
-    // TODO @芋艿：这里需要多 review 下；
+    // DONE @芋艿：已 review，逻辑正确
     @Override
     public void recallMessage(Long userId, Long messageId) {
         // 1.1 校验消息存在
diff --git a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/sensitiveword/ImSensitiveWordServiceImpl.java b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/sensitiveword/ImSensitiveWordServiceImpl.java
index d778bd1..52d614e 100644
--- a/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/sensitiveword/ImSensitiveWordServiceImpl.java
+++ b/yudao-module-im/yudao-module-im-biz/src/main/java/cn/iocoder/yudao/module/im/service/sensitiveword/ImSensitiveWordServiceImpl.java
@@ -2,16 +2,21 @@ package cn.iocoder.yudao.module.im.service.sensitiveword;
 
 import cn.iocoder.yudao.module.im.dal.dataobject.sensitiveword.ImSensitiveWordDO;
 import cn.iocoder.yudao.module.im.dal.mysql.sensitiveword.ImSensitiveWordMapper;
+import jakarta.annotation.PostConstruct;
 import jakarta.annotation.Resource;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Service;
 import org.springframework.validation.annotation.Validated;
 
+import java.util.Collections;
 import java.util.List;
+import java.util.stream.Collectors;
 
 import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
 import static cn.iocoder.yudao.module.im.enums.ErrorCodeConstants.MESSAGE_SENSITIVE_WORD_BLOCKED;
 
-// TODO @AI：需要内存化（加载到内存缓存，避免每次查库）；优先级低，后续优化
+// DONE @AI：已实现内存化，启动时加载 + 定时刷新
 /**
  * IM 敏感词 Service 实现类
  *
@@ -19,21 +24,49 @@ import static cn.iocoder.yudao.module.im.enums.ErrorCodeConstants.MESSAGE_SENSIT
  */
 @Service
 @Validated
+@Slf4j
 public class ImSensitiveWordServiceImpl implements ImSensitiveWordService {
 
     @Resource
     private ImSensitiveWordMapper imSensitiveWordMapper;
 
+    /**
+     * 内存缓存的敏感词列表
+     */
+    private volatile List<String> sensitiveWords = Collections.emptyList();
+
+    /**
+     * 初始化：启动时加载敏感词到内存
+     */
+    @PostConstruct
+    public void init() {
+        loadSensitiveWords();
+    }
+
+    /**
+     * 定时刷新：每 5 分钟重新加载一次
+     */
+    @Scheduled(fixedDelay = 5 * 60 * 1000, initialDelay = 5 * 60 * 1000)
+    public void refresh() {
+        loadSensitiveWords();
+    }
+
+    private void loadSensitiveWords() {
+        List<ImSensitiveWordDO> enabledWords = imSensitiveWordMapper.selectListByStatus();
+        sensitiveWords = enabledWords.stream()
+                .map(ImSensitiveWordDO::getWord)
+                .collect(Collectors.toList());
+        log.info("[loadSensitiveWords][加载 IM 敏感词 {} 个]", sensitiveWords.size());
+    }
+
     @Override
     public void validateText(String text) {
         if (text == null || text.isEmpty()) {
             return;
         }
-        // 查询所有启用状态的敏感词
-        List<ImSensitiveWordDO> enabledWords = imSensitiveWordMapper.selectListByStatus();
-        // 逐词匹配
-        for (ImSensitiveWordDO wordDO : enabledWords) {
-            if (text.contains(wordDO.getWord())) {
+        // 内存匹配
+        for (String word : sensitiveWords) {
+            if (text.contains(word)) {
                 throw exception(MESSAGE_SENSITIVE_WORD_BLOCKED);
             }
         }