feat: 优化AI教练聊天逻辑，增加用户聊天次数检查和响应内容

- 在AI教练控制器中添加用户聊天次数检查，若次数用完则返回相应提示信息。
- 更新AI聊天响应DTO，新增用户剩余聊天次数和AI回复文本字段，提升用户体验。
- 修改用户服务，支持初始体重和目标体重字段的更新，增强用户资料的完整性。

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

@@ -28,15 +28,11 @@ export class AiCoachController {
     @Res({ passthrough: false }) res: Response,
   ): Promise<StreamableFile | AiChatResponseDto | void> {
     const userId = user.sub;
+    this.logger.log(`chat: ${userId} chat body ${JSON.stringify(body, null, 2)}`);
     const stream = body.stream !== false; // 默认流式
     const userContent = body.messages?.[body.messages.length - 1]?.content || '';
 
-    // 判断用户是否有聊天次数
-    const usageCount = await this.usersService.getUserUsageCount(userId);
-    if (usageCount <= 0) {
-      this.logger.error(`chat: ${userId} has no usage count`);
-      throw new HttpException('用户没有聊天次数', HttpStatus.FORBIDDEN);
-    }
+
 
     // 创建或沿用会话ID，并保存用户消息
     const { conversationId } = await this.aiCoachService.createOrAppendMessages({
@@ -45,8 +41,20 @@ export class AiCoachController {
       userContent,
     });
 
-    // 体重和饮食指令处理现在已经集成到 streamChat 方法中
-    // 通过 # 字符开头的指令系统进行统一处理
+    // 判断用户是否有聊天次数
+    const usageCount = await this.usersService.getUserUsageCount(userId);
+    if (usageCount <= 0) {
+      this.logger.warn(`chat: ${userId} has no usage count`);
+
+      res.setHeader('Content-Type', 'application/json; charset=utf-8');
+      res.send({
+        conversationId,
+        text: '聊天次数用完了，明天再来吧～',
+      });
+      return
+    }
+
+
 
     const result = await this.aiCoachService.streamChat({
       userId,
@@ -59,6 +67,9 @@ export class AiCoachController {
 
     await this.usersService.deductUserUsageCount(userId);
 
+    // 普通流式/非流式响应
+    const readable = result as any;
+
     // 检查是否返回结构化数据（如确认选项）
     // 结构化数据必须使用非流式模式返回
     if (typeof result === 'object' && 'type' in result) {
@@ -70,8 +81,7 @@ export class AiCoachController {
       return;
     }
 
-    // 普通流式/非流式响应
-    const readable = result as any;
+
 
     if (!stream) {
       // 非流式：聚合后一次性返回文本

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

@@ -674,7 +674,7 @@ export class AiCoachService {
     const cleanText = restText.trim();
 
     // 识别体重记录指令
-    if (/^记体重$|^体重$|^称重$/.test(commandPart)) {
+    if (/^记体重$/.test(commandPart)) {
       return {
         isCommand: true,
         command: 'weight',
@@ -684,7 +684,7 @@ export class AiCoachService {
     }
 
     // 识别饮食记录指令
-    if (/^记饮食$|^饮食$|^记录饮食$/.test(commandPart)) {
+    if (/^记饮食$/.test(commandPart)) {
       return {
         isCommand: true,
         command: 'diet',

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

@@ -98,6 +98,14 @@ export class AiChatResponseDto {
   @ApiProperty({ type: AiResponseDataDto, description: '响应数据（非流式时返回）', required: false })
   @IsOptional()
   data?: AiResponseDataDto;
+
+  @ApiProperty({ description: '用户剩余的AI聊天次数', required: false })
+  @IsOptional()
+  usageCount?: number;
+
+  @ApiProperty({ description: 'AI回复的文本内容（非流式时返回）', required: false })
+  @IsOptional()
+  text?: string;
 }
 
 // 营养分析相关的DTO

src/users/dto/update-user.dto.ts

@@ -48,6 +48,14 @@ export class UpdateUserDto {
   @ApiProperty({ description: '体重（公斤）', example: 55.5 })
   weight?: number;
 
+  @IsOptional()
+  @ApiProperty({ description: '初始体重（公斤）', example: 60.0 })
+  initialWeight?: number;
+
+  @IsOptional()
+  @ApiProperty({ description: '目标体重（公斤）', example: 50.0 })
+  targetWeight?: number;
+
   @IsOptional()
   @ApiProperty({ description: '身高（厘米）', example: 168 })
   height?: number;

src/users/dto/user-response.dto.ts

@@ -25,7 +25,7 @@ export interface UserWithPurchaseStatus {
   maxUsageCount: number;
   favoriteTopicCount: number;
   isVip: boolean;
-  profile?: Pick<UserProfile, 'dailyStepsGoal' | 'dailyCaloriesGoal' | 'pilatesPurposes' | 'weight' | 'height' | 'activityLevel'>;
+  profile?: Pick<UserProfile, 'dailyStepsGoal' | 'dailyCaloriesGoal' | 'pilatesPurposes' | 'weight' | 'initialWeight' | 'targetWeight' | 'height' | 'activityLevel'>;
 }
 
 export class UserResponseDto implements BaseResponseDto<UserWithPurchaseStatus> {

src/users/models/user-profile.model.ts

@@ -54,6 +54,20 @@ export class UserProfile extends Model {
   })
   declare weight: number | null;
 
+  @Column({
+    type: DataType.FLOAT,
+    allowNull: true,
+    comment: '初始体重（公斤）',
+  })
+  declare initialWeight: number | null;
+
+  @Column({
+    type: DataType.FLOAT,
+    allowNull: true,
+    comment: '目标体重（公斤）',
+  })
+  declare targetWeight: number | null;
+
   @Column({
     type: DataType.FLOAT,
     allowNull: true,

src/users/users.service.ts

@@ -108,6 +108,8 @@ export class UsersService {
         dailyCaloriesGoal: profile?.dailyCaloriesGoal,
         pilatesPurposes: profile?.pilatesPurposes,
         weight: profile?.weight,
+        initialWeight: profile?.initialWeight,
+        targetWeight: profile?.targetWeight,
         height: profile?.height,
         activityLevel: profile?.activityLevel,
       }
@@ -179,7 +181,7 @@ export class UsersService {
 
   // 更新用户昵称、头像
   async updateUser(updateUserDto: UpdateUserDto): Promise<UpdateUserResponseDto> {
-    const { userId, name, avatar, gender, birthDate, dailyStepsGoal, dailyCaloriesGoal, pilatesPurposes, weight, height, activityLevel } = updateUserDto;
+    const { userId, name, avatar, gender, birthDate, dailyStepsGoal, dailyCaloriesGoal, pilatesPurposes, weight, initialWeight, targetWeight, height, activityLevel } = updateUserDto;
 
     this.logger.log(`updateUser: ${JSON.stringify(updateUserDto, null, 2)}`);
 
@@ -215,7 +217,7 @@ export class UsersService {
     await user.save();
 
     // 更新或创建扩展信息
-    if (dailyStepsGoal !== undefined || dailyCaloriesGoal !== undefined || pilatesPurposes !== undefined || weight !== undefined || height !== undefined || activityLevel !== undefined) {
+    if (dailyStepsGoal !== undefined || dailyCaloriesGoal !== undefined || pilatesPurposes !== undefined || weight !== undefined || initialWeight !== undefined || targetWeight !== undefined || height !== undefined || activityLevel !== undefined) {
       const [profile] = await this.userProfileModel.findOrCreate({
         where: { userId },
         defaults: { userId },
@@ -232,6 +234,14 @@ export class UsersService {
         }
         profileChanges.weight = weight;
       }
+      if (initialWeight !== undefined) {
+        profile.initialWeight = initialWeight;
+        profileChanges.initialWeight = initialWeight;
+      }
+      if (targetWeight !== undefined) {
+        profile.targetWeight = targetWeight;
+        profileChanges.targetWeight = targetWeight;
+      }
       if (height !== undefined) {
         profile.height = height;
         profileChanges.height = height;
@@ -650,6 +660,8 @@ export class UsersService {
           dailyCaloriesGoal: profileForLogin.dailyCaloriesGoal,
           pilatesPurposes: profileForLogin.pilatesPurposes,
           weight: profileForLogin.weight,
+          initialWeight: profileForLogin.initialWeight,
+          targetWeight: profileForLogin.targetWeight,
           height: profileForLogin.height,
           activityLevel: profileForLogin.activityLevel,
         } : undefined,
@@ -862,6 +874,8 @@ export class UsersService {
           dailyCaloriesGoal: profileForGuest.dailyCaloriesGoal,
           pilatesPurposes: profileForGuest.pilatesPurposes,
           weight: profileForGuest.weight,
+          initialWeight: profileForGuest.initialWeight,
+          targetWeight: profileForGuest.targetWeight,
           height: profileForGuest.height,
           activityLevel: profileForGuest.activityLevel,
         } : undefined,