fix(briefing): fetch full article content via trafilatura in discuss endpoint

src/fabledassistant/routes/briefing.py

@@ -453,7 +453,8 @@ async def discuss_article(item_id: int):
     if get_buffer(conv_id) is not None:
         return jsonify({"error": "Generation already in progress"}), 409
 
-    article_content = item.content or ""
+    from fabledassistant.services.rss import _fetch_full_article
+    article_content = await _fetch_full_article(item.url) or item.content or ""
 
     # Store synthetic assistant message with read_article tool result
     synthetic_tool_calls = [{