feat: unify media source identity flow (#6129)

tests/test_message_media_identity.py

@@ -0,0 +1,41 @@
+from app.core.context import MediaInfo
+from app.helper.message import TemplateContextBuilder
+from app.schemas.types import MediaType
+
+
+def test_message_context_contains_all_media_identity_fields() -> None:
+    """消息模板上下文应向插件暴露全部媒体源 ID 和当前主身份。"""
+    context = {}
+    media = MediaInfo(
+        source="anilist",
+        type=MediaType.TV,
+        title="测试动画",
+        tmdb_id=24680,
+        douban_id="35000000",
+        bangumi_id=499390,
+        anilist_id=170942,
+    )
+
+    TemplateContextBuilder._add_media_info(context, media)
+
+    assert context["tmdbid"] == 24680
+    assert context["doubanid"] == "35000000"
+    assert context["bangumiid"] == 499390
+    assert context["anilistid"] == 170942
+    assert context["media_source"] == "anilist"
+    assert context["media_id"] == "170942"
+    assert media.to_dict()["mediaid_prefix"] == "anilist"
+    assert media.to_dict()["media_id"] == "170942"
+
+
+def test_media_info_preserves_plugin_source_identity() -> None:
+    """核心媒体对象应原样保留插件自定义数据源的原生 ID。"""
+    media = MediaInfo(
+        source="plugin_source",
+        media_id="custom-100",
+        type=MediaType.MOVIE,
+        title="插件电影",
+    )
+
+    assert media.media_id == "custom-100"
+    assert media.to_dict()["media_id"] == "custom-100"