初始化技术博客项目

功能特性:
- 前端文章展示 (Markdown渲染、代码高亮)
- 后台管理系统 (文章、分类、标签、作者管理)
- 图片上传 (点击、拖拽、粘贴)
- 网站设置 (Logo、底部宣传图片上传)
- 访问统计 (IP记录、趋势图表)
- 参考来源、附件支持
- 单端口部署 (16012)

技术栈:
- Flask 3.0 + SQLAlchemy
- SQLite数据库
- marked.js + highlight.js (Markdown渲染)
- Chart.js (统计图表)

app/services/__init__.py

@@ -0,0 +1,10 @@
+"""服务层模块"""
+from app.services.article_service import ArticleService
+from app.services.category_service import CategoryService
+from app.services.tag_service import TagService
+from app.services.admin_service import AdminService
+from app.services.site_config_service import SiteConfigService
+from app.services.visit_service import VisitService
+from app.services.upload_service import UploadService, AuthorService, ReferenceService, AttachmentService
+
+__all__ = ['ArticleService', 'CategoryService', 'TagService', 'AdminService', 'SiteConfigService', 'VisitService', 'UploadService', 'AuthorService', 'ReferenceService', 'AttachmentService']