新增会话管理功能，包括获取会话列表、获取会话详情和删除会话的API，更新AI教练模块以支持会话模型，调整相关服务和数据传输对象。

src/ai-coach/ai-coach.controller.ts

@@ -1,5 +1,5 @@
-import { Body, Controller, Post, Res, StreamableFile, UseGuards } from '@nestjs/common';
-import { ApiTags, ApiOperation, ApiBody } from '@nestjs/swagger';
+import { Body, Controller, Delete, Get, Param, Post, Query, Res, StreamableFile, UseGuards } from '@nestjs/common';
+import { ApiTags, ApiOperation, ApiBody, ApiQuery, ApiParam } from '@nestjs/swagger';
 import { Response } from 'express';
 import { JwtAuthGuard } from '../common/guards/jwt-auth.guard';
 import { CurrentUser } from '../common/decorators/current-user.decorator';
@@ -70,6 +70,37 @@ export class AiCoachController {
 
     return;
   }
+
+  @Get('conversations')
+  @ApiOperation({ summary: '获取会话列表' })
+  async listConversations(
+    @CurrentUser() user: AccessTokenPayload,
+    @Query() query: { page?: number, pageSize?: number },
+  ) {
+    return this.aiCoachService.listConversations(user.sub, { page: query.page, pageSize: query.pageSize });
+  }
+
+  @Get('conversations/:conversationId')
+  @ApiOperation({ summary: '获取会话详情（包含消息）' })
+  @ApiParam({ name: 'conversationId' })
+  async getConversationDetail(
+    @CurrentUser() user: AccessTokenPayload,
+    @Param('conversationId') conversationId: string,
+  ) {
+    const data = await this.aiCoachService.getConversationDetail(user.sub, conversationId);
+    return data || { code: 404, message: '会话不存在' };
+  }
+
+  @Delete('conversations/:conversationId')
+  @ApiOperation({ summary: '删除会话（级联删除消息）' })
+  @ApiParam({ name: 'conversationId' })
+  async deleteConversation(
+    @CurrentUser() user: AccessTokenPayload,
+    @Param('conversationId') conversationId: string,
+  ) {
+    const ok = await this.aiCoachService.deleteConversation(user.sub, conversationId);
+    return { success: ok };
+  }
 }
 
 

src/ai-coach/ai-coach.module.ts

@@ -4,13 +4,14 @@ import { ConfigModule } from '@nestjs/config';
 import { AiCoachController } from './ai-coach.controller';
 import { AiCoachService } from './ai-coach.service';
 import { AiMessage } from './models/ai-message.model';
+import { AiConversation } from './models/ai-conversation.model';
 import { UsersModule } from '../users/users.module';
 
 @Module({
   imports: [
     ConfigModule,
     UsersModule,
-    SequelizeModule.forFeature([AiMessage]),
+    SequelizeModule.forFeature([AiConversation, AiMessage]),
   ],
   controllers: [AiCoachController],
   providers: [AiCoachService],

src/ai-coach/ai-coach.service.ts

@@ -3,14 +3,9 @@ import { ConfigService } from '@nestjs/config';
 import { OpenAI } from 'openai';
 import { Readable } from 'stream';
 import { AiMessage, RoleType } from './models/ai-message.model';
+import { AiConversation } from './models/ai-conversation.model';
 
-const SYSTEM_PROMPT = `你是一位资深的普拉提与运动康复教练（Pilates Coach），具备运动解剖学、体态评估、疼痛预防、功能性训练、力量与柔韧性、营养与饮食建议等专业知识。
-请遵循以下规则作答：
-1) 话题范围仅限：健康、健身、普拉提、康复、形体训练、柔韧性、力量训练、运动损伤预防与恢复、营养与饮食。
-2) 拒绝回答医疗诊断、情感心理、时政金融、编程等不相关或高风险话题，礼貌解释并引导回合适范围。
-3) 语言风格：亲切、专业、简洁分点回答；必要时提供可在家执行的分步骤方案与注意事项；给出不同水平与疼痛人群的替代动作与安全提示。
-4) 强调循序渐进与个体差异，避免绝对化表述；涉及疼痛或既往伤病时，建议在医生评估后进行训练。
-5) 所有训练建议默认不需要器械或仅需常见小器械（瑜伽垫、弹力带、泡沫轴等），估算时长与频率，并提供跟踪与自测方法。`;
+const SYSTEM_PROMPT = `作为一名资深的普拉提与运动康复教练（Pilates Coach），我拥有丰富的专业知识，包括但不限于运动解剖学、体态评估、疼痛预防、功能性训练、力量与柔韧性训练以及营养与饮食建议。请遵循以下指导原则进行交流： - **话题范围**：讨论将仅限于健康、健身、普拉提、康复、形体训练、柔韧性提升、力量训练、运动损伤预防与恢复、营养与饮食等领域。 - **拒绝回答的内容**：对于医疗诊断、情感心理支持、时政金融分析或编程等非相关或高风险问题，我会礼貌地解释为何这些不在我的专业范围内，并尝试将对话引导回上述合适的话题领域内。 - **语言风格**：我的回复将以亲切且专业的态度呈现，尽量做到条理清晰、分点阐述；当需要时，会提供可以在家轻松实践的具体步骤指南及注意事项；同时考虑到不同水平参与者的需求，特别是那些可能有轻微不适或曾受过伤的人群，我会给出相应的调整建议和安全提示。 - **个性化与安全性**：强调每个人的身体状况都是独一无二的，在提出任何锻炼计划之前都会提醒大家根据自身情况适当调整强度；如果涉及到具体的疼痛问题或是旧伤复发的情况，则强烈建议先咨询医生的意见再开始新的训练项目。 - **设备要求**：所有推荐的练习都假设参与者只有基础的家庭健身器材可用，比如瑜伽垫、弹力带或者泡沫轴等；此外还会对每项活动的大致持续时间和频率做出估计，并分享一些自我监测进步的方法。 请告诉我您具体想了解哪方面的信息，以便我能更好地为您提供帮助。`;
 
 @Injectable()
 export class AiCoachService {
@@ -19,7 +14,7 @@ export class AiCoachService {
   private readonly model: string;
 
   constructor(private readonly configService: ConfigService) {
-    const dashScopeApiKey = this.configService.get<string>('DASHSCOPE_API_KEY') || '';
+    const dashScopeApiKey = this.configService.get<string>('DASHSCOPE_API_KEY') || 'sk-e3ff4494c2f1463a8910d5b3d05d3143';
     const baseURL = this.configService.get<string>('DASHSCOPE_BASE_URL') || 'https://dashscope.aliyuncs.com/compatible-mode/v1';
 
     this.client = new OpenAI({
@@ -27,7 +22,7 @@ export class AiCoachService {
       baseURL,
     });
     // 默认选择通义千问对话模型（OpenAI兼容名），可通过环境覆盖
-    this.model = this.configService.get<string>('DASHSCOPE_MODEL') || 'qwen-plus';
+    this.model = this.configService.get<string>('DASHSCOPE_MODEL') || 'qwen-flash';
   }
 
   async createOrAppendMessages(params: {
@@ -35,7 +30,13 @@ export class AiCoachService {
     conversationId?: string;
     userContent: string;
   }): Promise<{ conversationId: string }> {
-    const conversationId = params.conversationId || `${params.userId}-${Date.now()}`;
+    let conversationId = params.conversationId;
+    if (!conversationId) {
+      conversationId = `${params.userId}-${Date.now()}`;
+      await AiConversation.create({ id: conversationId, userId: params.userId, title: null, lastMessageAt: new Date() });
+    } else {
+      await AiConversation.upsert({ id: conversationId, userId: params.userId, lastMessageAt: new Date() });
+    }
     await AiMessage.create({
       conversationId,
       userId: params.userId,
@@ -95,6 +96,7 @@ export class AiCoachService {
           content: assistantContent,
           metadata: { model: this.model },
         });
+        await AiConversation.update({ lastMessageAt: new Date(), title: this.deriveTitleIfEmpty(assistantContent) }, { where: { id: params.conversationId, userId: params.userId } });
       } catch (error) {
         this.logger.error(`stream error: ${error?.message || error}`);
         readable.push('\n[对话发生错误，请稍后重试]');
@@ -105,6 +107,59 @@ export class AiCoachService {
 
     return readable;
   }
+
+  private deriveTitleIfEmpty(assistantReply: string): string | null {
+    if (!assistantReply) return null;
+    const firstLine = assistantReply.split(/\r?\n/).find(Boolean) || '';
+    return firstLine.slice(0, 50) || null;
+  }
+
+  async listConversations(userId: string, params: { page?: number; pageSize?: number }) {
+    const page = Math.max(1, params.page || 1);
+    const pageSize = Math.min(50, Math.max(1, params.pageSize || 20));
+    const offset = (page - 1) * pageSize;
+    const { rows, count } = await AiConversation.findAndCountAll({
+      where: { userId },
+      order: [['last_message_at', 'DESC']],
+      offset,
+      limit: pageSize,
+    });
+    return {
+      page,
+      pageSize,
+      total: count,
+      items: rows.map((c) => ({
+        conversationId: c.id,
+        title: c.title,
+        lastMessageAt: c.lastMessageAt,
+        createdAt: c.createdAt,
+      })),
+    };
+  }
+
+  async getConversationDetail(userId: string, conversationId: string) {
+    const conv = await AiConversation.findOne({ where: { id: conversationId, userId } });
+    if (!conv) return null;
+    const messages = await AiMessage.findAll({
+      where: { userId, conversationId },
+      order: [['created_at', 'ASC']],
+    });
+    return {
+      conversationId: conv.id,
+      title: conv.title,
+      lastMessageAt: conv.lastMessageAt,
+      createdAt: conv.createdAt,
+      messages: messages.map((m) => ({ role: m.role, content: m.content, createdAt: m.createdAt })),
+    };
+  }
+
+  async deleteConversation(userId: string, conversationId: string): Promise<boolean> {
+    const conv = await AiConversation.findOne({ where: { id: conversationId, userId } });
+    if (!conv) return false;
+    await AiMessage.destroy({ where: { userId, conversationId } });
+    await AiConversation.destroy({ where: { id: conversationId, userId } });
+    return true;
+  }
 }
 
 

src/ai-coach/dto/ai-chat.dto.ts

@@ -1,5 +1,5 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { IsArray, IsBoolean, IsNotEmpty, IsOptional, IsString, MaxLength } from 'class-validator';
+import { IsArray, IsBoolean, IsNotEmpty, IsOptional, IsString, MaxLength, IsInt, Min, Max } from 'class-validator';
 
 export class AiChatMessageDto {
   @ApiProperty({ enum: ['user', 'assistant', 'system'] })
@@ -35,3 +35,4 @@ export class AiChatResponseDto {
 }
 
 
+

src/ai-coach/models/ai-conversation.model.ts

@@ -0,0 +1,53 @@
+import { Column, DataType, HasMany, Index, Model, PrimaryKey, Table } from 'sequelize-typescript';
+import { AiMessage } from './ai-message.model';
+
+@Table({
+  tableName: 't_ai_conversations',
+  underscored: true,
+})
+export class AiConversation extends Model {
+  @PrimaryKey
+  @Column({
+    type: DataType.STRING,
+    allowNull: false,
+  })
+  declare id: string;
+
+  @Column({
+    type: DataType.STRING,
+    allowNull: false,
+    comment: '用户ID',
+  })
+  declare userId: string;
+
+  @Column({
+    type: DataType.STRING,
+    allowNull: true,
+    comment: '会话标题（可选）',
+  })
+  declare title: string | null;
+
+  @Column({
+    type: DataType.DATE,
+    allowNull: true,
+    comment: '最后一条消息时间',
+  })
+  declare lastMessageAt: Date | null;
+
+  @Column({
+    type: DataType.DATE,
+    defaultValue: DataType.NOW,
+  })
+  declare createdAt: Date;
+
+  @Column({
+    type: DataType.DATE,
+    defaultValue: DataType.NOW,
+  })
+  declare updatedAt: Date;
+
+  @HasMany(() => AiMessage)
+  declare messages?: AiMessage[];
+}
+
+

src/ai-coach/models/ai-message.model.ts

@@ -1,4 +1,5 @@
-import { Column, DataType, Index, Model, PrimaryKey, Table } from 'sequelize-typescript';
+import { BelongsTo, Column, DataType, ForeignKey, Model, PrimaryKey, Table } from 'sequelize-typescript';
+import { AiConversation } from './ai-conversation.model';
 
 export enum RoleType {
   System = 'system',
@@ -12,11 +13,11 @@ export enum RoleType {
 })
 export class AiMessage extends Model {
   @PrimaryKey
+  @ForeignKey(() => AiConversation)
   @Column({
     type: DataType.STRING,
     allowNull: false,
     comment: '会话ID',
-    primaryKey: true,
   })
   declare conversationId: string;
 
@@ -57,6 +58,9 @@ export class AiMessage extends Model {
     defaultValue: DataType.NOW,
   })
   declare updatedAt: Date;
+
+  @BelongsTo(() => AiConversation)
+  declare conversation?: AiConversation;
 }
 
 

src/users/users.service.ts

@@ -80,18 +80,19 @@ export class UsersService {
         };
       }
 
-      const profile = await this.userProfileModel.findByPk(existingUser.id);
+      const [profile] = await this.userProfileModel.findOrCreate({
+        where: { userId: existingUser.id },
+        defaults: { userId: existingUser.id },
+      });
       const returnData = {
         ...existingUser.toJSON(),
         maxUsageCount: DEFAULT_FREE_USAGE_COUNT,
         isVip: existingUser.isVip,
-        profile: profile ? {
-          dailyStepsGoal: profile.dailyStepsGoal,
-          dailyCaloriesGoal: profile.dailyCaloriesGoal,
-          pilatesPurposes: profile.pilatesPurposes,
-          weight: profile.weight,
-          height: profile.height,
-        } : undefined,
+        dailyStepsGoal: profile?.dailyStepsGoal,
+        dailyCaloriesGoal: profile?.dailyCaloriesGoal,
+        pilatesPurposes: profile?.pilatesPurposes,
+        weight: profile?.weight,
+        height: profile?.height,
       }
 
       this.logger.log(`getProfile returnData: ${JSON.stringify(returnData, null, 2)}`);