AI Implementation feature(823): Landing Page and Login/Register Modal (#11)

backend/src/modules/blog/blog.controller.ts

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+import { Controller, Get } from '@nestjs/common';
+import { ApiTags, ApiOperation } from '@nestjs/swagger';
+import { Public } from '../../common/decorators/public.decorator';
+import { BlogService } from './blog.service';
+import { PublicBlogList } from './dto/blog.dto';
+
+@ApiTags('blog')
+@Controller('api/v1/blog')
+export class BlogController {
+  constructor(private readonly blog: BlogService) {}
+
+  @Public()
+  @Get('posts')
+  @ApiOperation({ summary: 'Public list of published blog posts' })
+  async listPosts(): Promise<PublicBlogList> {
+    const posts = await this.blog.listPublished();
+    return { posts };
+  }
+}

backend/src/modules/blog/blog.module.ts

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+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { BlogPostEntity } from '../../database/entities/blog-post.entity';
+import { BlogController } from './blog.controller';
+import { BlogService } from './blog.service';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([BlogPostEntity])],
+  controllers: [BlogController],
+  providers: [BlogService],
+})
+export class BlogModule {}

backend/src/modules/blog/blog.service.ts

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+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { BlogPostEntity } from '../../database/entities/blog-post.entity';
+import { PublicBlogPost } from './dto/blog.dto';
+
+@Injectable()
+export class BlogService {
+  constructor(
+    @InjectRepository(BlogPostEntity)
+    private readonly posts: Repository<BlogPostEntity>,
+  ) {}
+
+  async listPublished(): Promise<PublicBlogPost[]> {
+    const rows = await this.posts.find({
+      where: { status: 'published' },
+      order: { publishedAt: 'DESC' },
+    });
+    return rows.map((row) => ({
+      id: row.id,
+      title: row.title,
+      publishedAt: row.publishedAt ?? row.createdAt,
+      bodyMd: row.bodyMd ?? '',
+    }));
+  }
+}

backend/src/modules/blog/dto/blog.dto.ts

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+import { z } from 'zod';
+
+export const PublicBlogPostSchema = z.object({
+  id: z.string(),
+  title: z.string(),
+  publishedAt: z.string(),
+  bodyMd: z.string(),
+});
+export type PublicBlogPost = z.infer<typeof PublicBlogPostSchema>;
+
+export const PublicBlogListSchema = z.object({
+  posts: z.array(PublicBlogPostSchema),
+});
+export type PublicBlogList = z.infer<typeof PublicBlogListSchema>;