feat: 实现下载完成后自动触发智能分类整理

- 添加 AutoAfterDownload 配置字段到 OrganizerConfig
- 设置默认值为 false
- 修改 DownloadService 结构，添加 organizer 和 prevStates 字段
- 修改 NewDownloadService 构造函数，接受 organizer 参数
- 修改 service.go 初始化顺序，将 organizer 创建移到 downloads 之前
- 修改 poll() 方法，检测下载完成并触发整理
- 实现 onTorrentComplete() 方法，根据 savePath 查找 Media 并整理

internal/service/service.go

@@ -88,10 +88,11 @@ func New(cfg *config.Config, log *zap.Logger, repos *repository.Container) *Cont
 	thetvdb := NewTheTVDBProvider(cfg, log)
 	fanart := NewFanartProvider(cfg, log)
 	scraper := NewScraperService(cfg, log, repos, tmdb, bangumi, thetvdb, fanart, hub)
+	organizer := NewOrganizerService(cfg, log, repos)
+	downloads := NewDownloadService(log, repos, hub, organizer)
 	discover := NewDiscoverService(log, tmdb)
 	transcoder := NewTranscoderService(cfg, log, repos, hub)
 	scanner := NewScannerService(cfg, log, repos, hub, probe, scraper)
-	downloads := NewDownloadService(log, repos, hub)
 	subscription := NewSubscriptionService(log, repos, downloads, hub)
 	watcher := NewWatcherService(log, repos, scanner)
 	nfo := NewNFOService(log, repos)
@@ -109,7 +110,6 @@ func New(cfg *config.Config, log *zap.Logger, repos *repository.Container) *Cont
 	storageCfg := NewStorageConfigService(log, repos, crypto)
 	downloadClients := NewDownloadClientService(log, repos)
 	assistant := NewAssistantService(log, repos, ai)
-	organizer := NewOrganizerService(cfg, log, repos)
 	douban := NewDoubanProvider(cfg, log)
 	scheduler := NewSchedulerService(log, repos, scanner, transcoder, hub, cfg.Cache.CacheDir)