feat: 意见反馈功能

新增完整反馈闭环:
- 后端: Feedback 模块 (schema+service+controller+module)
  - POST /api/feedback (用户提交)
  - GET /api/feedback (管理员列表)
  - PATCH /api/feedback/:id/resolve (管理员标记已处理)
- 前端: pages/feedback/feedback.vue
  - 三种反馈类型: 问题反馈/改进建议/点赞鼓励
  - 文本输入 + 联系方式选填
  - 提交后显示成功提示
- 用户页新增'意见反馈'菜单入口
- 管理后台可通过 API 查看和管理反馈

backend/src/app.module.ts

@@ -9,6 +9,7 @@ import { APP_GUARD } from '@nestjs/core'
 import { JwtStrategy } from './common/strategies/jwt.strategy'
 import { JwtAuthGuard } from './common/guards/jwt-auth.guard'
 import { AiModule } from './modules/ai/ai.module'
+import { FeedbackModule } from './modules/feedback/feedback.module'
 import { UserModule } from './modules/user/user.module'
 import { InterviewModule } from './modules/interview/interview.module'
 import { ResumeModule } from './modules/resume/resume.module'
@@ -47,6 +48,7 @@ const MONGODB_URI = process.env.MONGODB_URI || 'mongodb://localhost:27017/zhiyin
     }]),
     NestScheduleModule.forRoot(),
     UserModule,
+    FeedbackModule,
     AiModule,
     InterviewModule,
     AnalyzeModule,

backend/src/modules/feedback/feedback.controller.ts

@@ -0,0 +1,31 @@
+import { Controller, Post, Get, Patch, Param, Body, Query, UseGuards, HttpException, HttpStatus } from '@nestjs/common'
+import { FeedbackService } from './feedback.service'
+import { JwtAuthGuard } from '../../common/guards/jwt-auth.guard'
+import { AdminGuard } from '../../common/guards/admin.guard'
+import { CurrentUser } from '../../common/decorators/current-user.decorator'
+
+@Controller('feedback')
+export class FeedbackController {
+  constructor(private service: FeedbackService) {}
+
+  @UseGuards(JwtAuthGuard)
+  @Post()
+  async create(@CurrentUser('userId') userId: string, @Body() body: { type?: string; content: string; contact?: string }) {
+    if (!body.content || body.content.length < 2) {
+      throw new HttpException('请填写反馈内容', HttpStatus.BAD_REQUEST)
+    }
+    return this.service.create({ userId, type: body.type || 'suggestion', content: body.content, contact: body.contact })
+  }
+
+  @UseGuards(JwtAuthGuard, AdminGuard)
+  @Get()
+  async list(@Query('page') page?: string, @Query('limit') limit?: string) {
+    return this.service.findAll(Number(page) || 1, Number(limit) || 20)
+  }
+
+  @UseGuards(JwtAuthGuard, AdminGuard)
+  @Patch(':id/resolve')
+  async resolve(@Param('id') id: string) {
+    return this.service.markResolved(id)
+  }
+}

backend/src/modules/feedback/feedback.module.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common'
+import { MongooseModule } from '@nestjs/mongoose'
+import { FeedbackController } from './feedback.controller'
+import { FeedbackService } from './feedback.service'
+import { Feedback, FeedbackSchema } from './feedback.schema'
+
+@Module({
+  imports: [MongooseModule.forFeature([{ name: Feedback.name, schema: FeedbackSchema }])],
+  controllers: [FeedbackController],
+  providers: [FeedbackService],
+  exports: [FeedbackService],
+})
+export class FeedbackModule {}

backend/src/modules/feedback/feedback.schema.ts

@@ -0,0 +1,24 @@
+import { Prop, Schema, SchemaFactory } from '@nestjs/mongoose'
+import { Document, Types } from 'mongoose'
+
+export type FeedbackDocument = Feedback & Document
+
+@Schema({ timestamps: true })
+export class Feedback {
+  @Prop({ type: Types.ObjectId, ref: 'User', required: true })
+  userId: Types.ObjectId
+
+  @Prop({ default: 'suggestion' })
+  type: string
+
+  @Prop({ required: true })
+  content: string
+
+  @Prop({ default: '' })
+  contact: string
+
+  @Prop({ default: 'pending' })
+  status: string
+}
+
+export const FeedbackSchema = SchemaFactory.createForClass(Feedback)

backend/src/modules/feedback/feedback.service.ts

@@ -0,0 +1,26 @@
+import { Injectable } from '@nestjs/common'
+import { InjectModel } from '@nestjs/mongoose'
+import { Model } from 'mongoose'
+import { Feedback } from './feedback.schema'
+
+@Injectable()
+export class FeedbackService {
+  constructor(@InjectModel(Feedback.name) private model: Model<Feedback>) {}
+
+  async create(data: { userId: string; type: string; content: string; contact?: string }) {
+    return this.model.create(data)
+  }
+
+  async findAll(page = 1, limit = 20) {
+    const skip = (page - 1) * limit
+    const [items, total] = await Promise.all([
+      this.model.find().sort({ createdAt: -1 }).skip(skip).limit(limit).populate('userId', 'nickname phone email').lean(),
+      this.model.countDocuments(),
+    ])
+    return { items, total, page, limit }
+  }
+
+  async markResolved(id: string) {
+    return this.model.findByIdAndUpdate(id, { status: 'resolved' }, { new: true })
+  }
+}