fix(media): 修复emby电影库混入剧集/特别篇识别/剧集合集 + 新增手动编辑元数据

emby 兼容层(hills/yamby 等客户端):
- 电影库不再混入剧集:filterLikelyEpisodicPathsFromMovieQuery 按路径
  特征(Season/S0x/Specials/电视剧/日番/国漫等)剔除误入电影库的剧集
- itemPayload 改用 mediaShouldBeEpisode:有季集号且(属剧集库或路径像剧集)
  才标记为 Episode,修正电影库里剧集被当成 Movie

特别篇识别:
- episode_parser 新增 patSpecialSeason,识别 S0/Season 0/Specials/SP/OVA/
  OAD/番外/特别篇/特典 文件夹 → 第0季;seasonFromParents 返回 found 标志,
  区分"明确第0季"与"未识别默认第1季"
- emby seasonDir 正则同步支持 Specials/SP/OVA/特别篇 等

剧集合集:
- groupSeries 抽出 isSeriesCard,卡片链接按是否剧集判定,修复剧集卡片
  跳转;每集分离的根因(季集号/分组key)随入库识别修复一并改善

手动编辑元数据(自采集视频无TMDB信息时可自定义封面/标题/简介/分类):
- 新增 MediaService.UpdateMetadata + PATCH /media/:id/metadata(需admin)
- 前端 MetadataEditDialog 接入 LibraryPage 与 MediaDetailPage

其他:scanner/scraper/nfo/local+cloud_metadata/adult 元数据识别配套改进;
.gitignore 忽略本地 .dev-cache/.dev-data 运行产物。

internal/service/external_search.go

@@ -11,24 +11,29 @@ import (
 // intentionally separate from model.Media because the item may not exist in
 // the local library yet.
 type ExternalMediaResult struct {
-	Source             string  `json:"source"`
-	MediaType          string  `json:"media_type,omitempty"`
-	Title              string  `json:"title"`
-	Overview           string  `json:"overview,omitempty"`
-	PosterURL          string  `json:"poster_url,omitempty"`
-	BackdropURL        string  `json:"backdrop_url,omitempty"`
-	Year               int     `json:"year,omitempty"`
-	Rating             float32 `json:"rating,omitempty"`
-	TMDbID             int     `json:"tmdb_id,omitempty"`
-	BangumiID          int     `json:"bangumi_id,omitempty"`
-	DoubanID           string  `json:"douban_id,omitempty"`
-	TheTVDBID          string  `json:"thetvdb_id,omitempty"`
-	SubscribeKeyword   string  `json:"subscribe_keyword"`
-	TotalEpisodes      int     `json:"total_episodes,omitempty"`
-	DownloadedEpisodes int     `json:"downloaded_episodes,omitempty"`
-	LocalMediaCount    int     `json:"local_media_count,omitempty"`
-	MissingEpisodes    []int   `json:"missing_episodes,omitempty"`
-	InLibrary          bool    `json:"in_library"`
+	Source             string   `json:"source"`
+	MediaType          string   `json:"media_type,omitempty"`
+	Title              string   `json:"title"`
+	OriginalName       string   `json:"original_name,omitempty"`
+	Overview           string   `json:"overview,omitempty"`
+	PosterURL          string   `json:"poster_url,omitempty"`
+	BackdropURL        string   `json:"backdrop_url,omitempty"`
+	Year               int      `json:"year,omitempty"`
+	Rating             float32  `json:"rating,omitempty"`
+	TMDbID             int      `json:"tmdb_id,omitempty"`
+	BangumiID          int      `json:"bangumi_id,omitempty"`
+	DoubanID           string   `json:"douban_id,omitempty"`
+	TheTVDBID          string   `json:"thetvdb_id,omitempty"`
+	SubscribeKeyword   string   `json:"subscribe_keyword"`
+	TotalEpisodes      int      `json:"total_episodes,omitempty"`
+	DownloadedEpisodes int      `json:"downloaded_episodes,omitempty"`
+	LocalMediaCount    int      `json:"local_media_count,omitempty"`
+	MissingEpisodes    []int    `json:"missing_episodes,omitempty"`
+	InLibrary          bool     `json:"in_library"`
+	Languages          []string `json:"languages,omitempty"`
+	Countries          []string `json:"countries,omitempty"`
+	Genres             []string `json:"genres,omitempty"`
+	NSFW               bool     `json:"nsfw,omitempty"`
 }
 
 // SearchExternalMedia fans out one normalized search intent to TMDb, Douban
@@ -53,6 +58,7 @@ func SearchExternalMedia(ctx context.Context, query string, year int, mediaType
 			Source:           source,
 			MediaType:        typ,
 			Title:            m.Title,
+			OriginalName:     m.OriginalName,
 			Overview:         m.Overview,
 			PosterURL:        m.PosterURL,
 			BackdropURL:      m.BackdropURL,
@@ -62,6 +68,10 @@ func SearchExternalMedia(ctx context.Context, query string, year int, mediaType
 			BangumiID:        m.BangumiID,
 			SubscribeKeyword: buildSubscribeKeyword(m.Title, m.Year),
 			TotalEpisodes:    totalEpisodes,
+			Languages:        m.Languages,
+			Countries:        m.Countries,
+			Genres:           m.Genres,
+			NSFW:             m.NSFW,
 		})
 	}