fix(article-summary): only engage FSM when user explicitly asks for summary/audio

Previously any chat message containing an article URL triggered the
Blinkist FSM: Firecrawl extraction + LLM topic detection + 3-option
menu. Pasting a link as conversational context spammed the menu.

Now _check_for_url additionally requires an intent keyword (summary,
zusammenfassung, audio, mp3, blinkist, tldr, lies das, fasse zusammen,
discuss/diskutieren, etc.) before engaging. Without intent the URL
falls through to the normal AI handler.

Also bind-mount article_summary/ so future fixes survive container
recreate (matches the pattern used for bot.py/voice.py/agent.py).

article_summary/__init__.py

@@ -28,6 +28,16 @@ _DISCUSS_KW = {"discuss", "diskutieren", "besprechen", "reden", "talk", "chat"}
 _TEXT_KW = {"text", "zusammenfassung", "summary", "lesen", "read", "schriftlich", "written"}
 _AUDIO_KW = {"audio", "mp3", "anhören", "vorlesen", "hören", "listen", "blinkist", "abspielen", "podcast"}
 
+# Words that signal the user actually wants the article-summary FSM to engage.
+# Without one of these, a pasted URL is left alone (chat-as-usual).
+# Union of discuss/text/audio keywords + explicit summary asks.
+_INTENT_KW = (
+    _DISCUSS_KW | _TEXT_KW | _AUDIO_KW |
+    {"tldr", "tl;dr", "fasse zusammen", "fass zusammen", "zusammenfassen",
+     "summarise", "summarize", "worum geht", "was steht", "what does it say",
+     "kannst du das lesen", "lies das", "lies mir", "read this", "read it"}
+)
+
 # Simple German detection: common words that appear frequently in German text
 _DE_INDICATORS = {"der", "die", "das", "und", "ist", "ein", "eine", "für", "mit", "auf", "den", "dem", "sich", "nicht", "von", "wird", "auch", "nach", "wie", "aber"}
 
@@ -160,13 +170,21 @@ class ArticleSummaryHandler:
     async def _check_for_url(
         self, room_id: str, sender: str, body: str
     ) -> str | None:
-        """Check if message contains an article URL."""
+        """Check if message contains an article URL AND explicit summary intent."""
         urls = URL_PATTERN.findall(body)
         # Filter to article-like URLs
         article_urls = [u for u in urls if is_article_url(u)]
         if not article_urls:
             return None
 
+        # Only engage the FSM if the user explicitly asked for a summary /
+        # discussion / audio. Otherwise a pasted URL is just context for normal
+        # chat and we shouldn't burn a Firecrawl + LLM topic-detection call,
+        # nor interrupt with the 3-option menu.
+        body_lower = body.lower()
+        if not any(kw in body_lower for kw in _INTENT_KW):
+            return None
+
         url = article_urls[0]
         session = self.sessions.get(sender, room_id)