Release v0.5.0: 重构为服务层架构

- 提取 LibraryService 处理媒体文件扫描和路径解析
- 提取 FavoriteService 管理收藏功能
- 提取 RecommendService 处理加权随机推荐算法
- 提取 ThumbnailService 处理缩略图生成
- 简化 app.py，专注于路由和视图逻辑
- 优化模板代码

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: ChanMo

.gitignore

@@ -163,3 +163,4 @@ cython_debug/
 node_modules/
 
 .DS_Store
+default/

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "TikLocal"
-version = "0.4.2"
+version = "0.5.0"
 description = "A local media server that combines the features of TikTok and Pinterest"
 authors = ["ChanMo <chan.mo@outlook.com>"]
 readme = "README.md"