fix(rename): 剥离专辑名尾部年份，避免重命名目录重复年份 (#6355)

音频标签或下载目录常把发行年份写进专辑名（如 "欲望反光 (2018)"），
而音乐重命名模板会独立追加 ({{year}})，两者叠加生成 "欲望反光 (2018) (2018)"
这类重复年份目录，并把同一专辑拆到多个目录。

在模板上下文中统一剥离专辑名尾部的括号年份；仅当存在可独立渲染的
年份时才剥离，避免丢失只存在于专辑名中的年份信息。

app/application/messaging/message.py

@@ -29,6 +29,13 @@ from app.foundation import size as size_tools
 from app.foundation.crypto import HashUtils
 
 
+# 专辑名尾部的括号年份标记；重命名模板会独立追加 `({{year}})`，
+# 标签或目录名中自带的尾部年份若不剥离，会生成重复年份的目录名（issue #6355）
+_ALBUM_TRAILING_YEAR_RE = re.compile(
+    r"(?:[\s\u3000]*[\(\[（【]\s*(?:19|20)\d{2}\s*[\)\]）】])+$"
+)
+
+
 class AsyncMessageQueryRepository(Protocol):
     """消息查询用例依赖的异步持久化端口。"""
 
@@ -169,23 +176,32 @@ class TemplateContextBuilder:
                     aggregate_music_album
                     and mediainfo.music_type == MUSIC_ENTITY_ALBUM
             )
+            # 专辑场景以识别结果的专辑名为标题；整专年份以识别结果为准，
+            # 逐文件场景沿用 meta 解析年份，保证文件级年份优先。
+            year = (
+                mediainfo.year
+                if (is_album_context and mediainfo.year)
+                else (context.get("year") or mediainfo.year)
+            )
             if is_album_context and mediainfo.album:
-                title = cls.__convert_invalid_characters(mediainfo.album)
+                title = cls.__strip_album_trailing_year(
+                    cls.__convert_invalid_characters(mediainfo.album), year
+                )
             else:
                 title = context.get("title") or cls.__convert_invalid_characters(mediainfo.title)
             artists = context.get("artists") or [
                 cls.__convert_invalid_characters(item) for item in mediainfo.artists
             ]
             artist = context.get("artist") or cls.__convert_invalid_characters(mediainfo.artist)
-            album = context.get("album") or cls.__convert_invalid_characters(mediainfo.album)
+            # 标签/目录名自带的尾部年份会被重命名模板的 `({{year}})` 再次追加，
+            # 统一剥离避免生成 "专辑 (2018) (2018)" 这类重复年份目录（issue #6355）
+            album = cls.__strip_album_trailing_year(
+                context.get("album") or cls.__convert_invalid_characters(mediainfo.album),
+                year,
+            )
             album_artist = context.get("album_artist") or cls.__convert_invalid_characters(
                 mediainfo.album_artist
             )
-            year = (
-                mediainfo.year
-                if (is_album_context and mediainfo.year)
-                else (context.get("year") or mediainfo.year)
-            )
             disc_number = context.get("disc_number") or mediainfo.disc_number
             track_number = (
                 None
@@ -305,7 +321,10 @@ class TemplateContextBuilder:
                 "title": cls.__convert_invalid_characters(meta.title),
                 "artists": [cls.__convert_invalid_characters(item) for item in meta.artists],
                 "artist": cls.__convert_invalid_characters(meta.artist),
-                "album": cls.__convert_invalid_characters(meta.album),
+                # 标签专辑名常自带尾部年份，与模板独立追加的年份去重（issue #6355）
+                "album": cls.__strip_album_trailing_year(
+                    cls.__convert_invalid_characters(meta.album), meta.year
+                ),
                 "album_artist": cls.__convert_invalid_characters(meta.album_artist),
                 "year": meta.year,
                 "disc_number": meta.disc_number,
@@ -513,6 +532,21 @@ class TemplateContextBuilder:
             filename = filename.replace(char, char.translate(translation_table))
         return filename
 
+    @staticmethod
+    def __strip_album_trailing_year(
+            album: Optional[str], year: Optional[int]
+    ) -> Optional[str]:
+        """
+        去除专辑名尾部的括号年份标记（如 ``欲望反光 (2018)`` -> ``欲望反光``）。
+
+        音频标签或下载目录常把发行年份写进专辑名，而重命名模板会独立追加
+        ``({{year}})``，两者叠加会生成 "专辑 (2018) (2018)" 这类重复年份目录；
+        仅当存在可独立渲染的年份时才剥离，避免丢失只存在于专辑名中的年份信息。
+        """
+        if not album or not year:
+            return album
+        return _ALBUM_TRAILING_YEAR_RE.sub("", album) or album
+
 
 class TemplateHelper(metaclass=SingletonClass):
     """

tests/test_template_context_builder.py

@@ -189,3 +189,59 @@ def test_build_exposes_music_audio_specs_for_notifications() -> None:
     assert context["audio_specs"] == "FLAC · 24-bit · 96 kHz · 2,304 kbps"
     assert context["bitrate_kbps"] == 2304
     assert context["sample_rate_khz"] == "96"
+
+
+def _build_music_context(album, year):
+    """
+    构造音乐重命名上下文：标签专辑名带年份、文件/目录年份可独立渲染的场景。
+    """
+    meta = MetaMusic(
+        title="欲望反光",
+        album=album,
+        artists=["萧敬腾"],
+        album_artist="萧敬腾",
+        year=year,
+        track_number=1,
+        audio_format="FLAC",
+    )
+    return TemplateContextBuilder().build(meta=meta)
+
+
+def test_music_rename_strips_duplicate_album_year() -> None:
+    """专辑名尾部的年份标记不应与模板追加的年份重复（issue #6355）。"""
+    context = _build_music_context(album="欲望反光 (2018)", year=2018)
+
+    assert context["album"] == "欲望反光"
+    assert context["year"] == 2018
+
+
+def test_music_rename_strips_album_year_different_from_media_year() -> None:
+    """标签专辑名年份与识别年份不一致时，仅保留模板追加的识别年份。"""
+    context = _build_music_context(
+        album="洛克先生Mr.Rock演唱会Live纪实 (2010)", year=2009
+    )
+
+    assert context["album"] == "洛克先生Mr.Rock演唱会Live纪实"
+    assert context["year"] == 2009
+
+
+def test_music_rename_strips_repeated_album_year_suffixes() -> None:
+    """历史整理已生成的重复年份目录再次重命名时，所有尾部年份都应被剥离。"""
+    context = _build_music_context(album="爱的时刻自选辑 (2009) (2009)", year=2015)
+
+    assert context["album"] == "爱的时刻自选辑"
+    assert context["year"] == 2015
+
+
+def test_music_rename_keeps_album_year_when_no_standalone_year() -> None:
+    """没有独立年份可渲染时保留专辑名自带的年份，避免信息丢失。"""
+    context = _build_music_context(album="欲望反光 (2018)", year=None)
+
+    assert context["album"] == "欲望反光 (2018)"
+
+
+def test_music_rename_keeps_plain_album_title() -> None:
+    """不含年份的普通专辑名不受影响。"""
+    context = _build_music_context(album="叶惠美", year=2003)
+
+    assert context["album"] == "叶惠美"