fix: NHK 源配置改 ja(seed 写错了); translate_article 加强 lang_src 兜底

backend/app/scripts/seed_sources.py

@@ -64,7 +64,7 @@ SEEDS = [
         "kind": "rss",
         "url": "https://www3.nhk.or.jp/rss/news/cat0.xml",
         "region": "asia",
-        "language_src": "en",
+        "language_src": "ja",
         "priority": 70,
         "fetch_interval_min": 60,
         "translate_to": "zh",

backend/app/workers/pipeline.py

@@ -155,7 +155,12 @@ async def translate_article(article_id: int) -> None:
             return
         title = art.title
         body_text = (art.body_text or "")[:TRANSLATE_BODY_MAX]
-        lang_src = art.lang_src or "auto"
+        # lang_src 优先级:article.lang_src > source.language_src > "auto"
+        # (article 入库时已经优先用了 feedparser 的 lang,这里再做一次兜底)
+        if not art.lang_src and art.source and art.source.language_src:
+            lang_src = art.source.language_src
+        else:
+            lang_src = art.lang_src or "auto"
         target = "zh"
         article_id_ref = art.id