feat: 完善后端架构和service层实现

- 创建完整的entity实体类体系，包括所有业务实体
- 实现BaseEntity基类，统一管理公共字段
- 创建雪花算法ID生成器和自动填充处理器
- 简化所有mapper接口，只继承BaseMapper
- 重构service层，使用LambdaQueryWrapper进行数据库操作
- 创建BasePageRequest分页查询基类
- 完善用户上下文管理和JWT认证
- 新增WebSocket聊天功能和相关控制器
- 更新前端配置和组件，完善用户认证流程
- 同步数据库建表脚本

backend-single/src/main/java/com/emotion/mapper/AchievementMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.Achievement;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 成就Mapper接口
+ * 
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface AchievementMapper extends BaseMapper<Achievement> {
+}

backend-single/src/main/java/com/emotion/mapper/CommentMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.Comment;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 评论Mapper接口
+ * 
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface CommentMapper extends BaseMapper<Comment> {
+}

backend-single/src/main/java/com/emotion/mapper/CommunityPostMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.CommunityPost;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 社区帖子Mapper接口
+ * 
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface CommunityPostMapper extends BaseMapper<CommunityPost> {
+}

backend-single/src/main/java/com/emotion/mapper/ConversationMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.Conversation;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 会话Mapper接口
+ *
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface ConversationMapper extends BaseMapper<Conversation> {
+}

backend-single/src/main/java/com/emotion/mapper/CozeApiCallMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.CozeApiCall;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * Coze API调用记录Mapper接口
+ *
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface CozeApiCallMapper extends BaseMapper<CozeApiCall> {
+}

backend-single/src/main/java/com/emotion/mapper/EmotionAnalysisMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.EmotionAnalysis;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 情绪分析Mapper接口
+ *
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface EmotionAnalysisMapper extends BaseMapper<EmotionAnalysis> {
+}

backend-single/src/main/java/com/emotion/mapper/EmotionRecordMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.EmotionRecord;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 情绪记录Mapper接口
+ * 
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface EmotionRecordMapper extends BaseMapper<EmotionRecord> {
+}

backend-single/src/main/java/com/emotion/mapper/GrowthTopicMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.GrowthTopic;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 成长课题Mapper接口
+ * 
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface GrowthTopicMapper extends BaseMapper<GrowthTopic> {
+}

backend-single/src/main/java/com/emotion/mapper/GuestUserMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.GuestUser;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 访客用户Mapper接口
+ * 
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface GuestUserMapper extends BaseMapper<GuestUser> {
+}

backend-single/src/main/java/com/emotion/mapper/LocationPinMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.LocationPin;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 地点标记Mapper接口
+ * 
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface LocationPinMapper extends BaseMapper<LocationPin> {
+}

backend-single/src/main/java/com/emotion/mapper/MessageMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.Message;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 消息Mapper接口
+ *
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface MessageMapper extends BaseMapper<Message> {
+}

backend-single/src/main/java/com/emotion/mapper/TopicInteractionMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.TopicInteraction;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 课题互动Mapper接口
+ * 
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface TopicInteractionMapper extends BaseMapper<TopicInteraction> {
+}

backend-single/src/main/java/com/emotion/mapper/UserMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.User;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 用户Mapper接口
+ *
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface UserMapper extends BaseMapper<User> {
+}

backend-single/src/main/java/com/emotion/mapper/UserStatsMapper.java

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+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.UserStats;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 用户统计Mapper接口
+ * 
+ * @author emotion-museum
+ * @date 2025-07-23
+ */
+@Mapper
+public interface UserStatsMapper extends BaseMapper<UserStats> {
+}