feat: LLM 解耦 bot、RSS 外置与内容过滤

daily 自建 Cursor bridge；DAILY_LLM_PROVIDER 控制后端；config/feeds.yaml 与 sensitive_words 可配置。

Co-authored-by: Cursor <cursoragent@cursor.com>

daily/news/fetch.py

@@ -17,6 +17,7 @@ import certifi
 import httpx
 
 from daily.config import env, env_int, news_summary_limit
+from daily.news.content_filter import filter_news_items
 from daily.news.feeds import NEWS_CATEGORIES, NewsCategory, NewsFeed
 from daily.news.feeds_cn import CN_AI_TITLE_KEYWORDS, CN_NEWS_CATEGORIES
 
@@ -349,6 +350,7 @@ def _fetch_news(categories: tuple[NewsCategory, ...]) -> dict[str, Any]:
         "feeds_ok": 0,
         "items_raw": 0,
         "feeds_failed": [],
+        "content_filtered": 0,
     }
 
     with httpx.Client(timeout=15.0, verify=certifi.where(), follow_redirects=True, headers=headers) as client:
@@ -394,6 +396,9 @@ def _fetch_news(categories: tuple[NewsCategory, ...]) -> dict[str, Any]:
     for category in categories:
         items = raw_by_category[category.id]
         items = [i for i in items if _within_window(i, cutoff)]
+        items, filtered_count = filter_news_items(items)
+        if filtered_count:
+            stats["content_filtered"] = stats.get("content_filtered", 0) + filtered_count
         items.sort(key=_sort_key, reverse=True)
         items = _dedupe_items(items)[:per_category]
         for item in items: