Implement clickable links when chatbot cites a public-facing article

app.py

@@ -113,6 +113,22 @@ def ensure_kb(client):
         return True, ""
     return False, (KB.error or "Knowledge base could not be initialized.")
 
+def link_document_titles(text):
+    """
+    Turn document titles with participant-facing URLs into clickable
+    Markdown links. Sources without URLs stay as plain text.
+    """
+    if not text or not KB.ready:
+        return text
+
+    for title, url in KB.source_link_map().items():
+        text = text.replace(
+            title,
+            f"[{title}]({url})"
+        )
+
+    return text
+
 # ----------------------------------------------------------------------
 # Supabase persistence — every participant is identified by their email.
 # Their 16 answers and their whole conversation are written to Supabase as
@@ -813,6 +829,8 @@ def respond(user_msg, chat_display, convo, n_followups, api_key, email,
             "\n\n_This summary reflects what you shared. Please bring it to your care team. "
             "It is not medical advice._"
         )
+
+    display_reply = link_document_titles(display_reply)
     
     chat_display = chat_display + [{"role": "assistant", "content": display_reply}]