Revert "memory Heurísticamente"

This reverts commit 70c3587bb8eb46efbf4a14decfbbadf65194091f.

app.py

@@ -466,22 +466,6 @@ def detect_chart_preferences(question: str) -> Tuple[bool, str]:
     except Exception:
         return False, "bar"
 
-def is_db_intent(question: str) -> bool:
-    """Heurísticamente detecta si la intención del usuario requiere la BD/SQL."""
-    try:
-        q = (question or "").lower()
-        keywords = [
-            "sql", "consulta", "query", "tabla", "tablas", "columna",
-            "columnas", "registro", "registros", "bd", "base de datos",
-            "database", "select", "insert", "update", "delete", "from",
-            "where", "join", "group by", "order by", "count(", "avg(",
-            "sum(", "min(", "max(", "gráfico" , "grafico", "gráfica",
-            "grafica", "visualización", "visualizacion"
-        ]
-        return any(k in q for k in keywords)
-    except Exception:
-        return False
-
 def generate_plot(data, x_col, y_col, title, x_label, y_label):
     """Generate a plot from data and return the file path."""
     plt.figure(figsize=(10, 6))
@@ -553,20 +537,6 @@ async def stream_agent_response(question: str, chat_history: List[List[str]], se
     # Add current user's question
     user_message = HumanMessage(content=question)
     messages.append(user_message)
-
-    # If the user is NOT asking about DB/SQL and not requesting a chart,
-    # answer conversationally using the raw LLM with the accumulated history.
-    wants_chart, _ = detect_chart_preferences(question)
-    if not is_db_intent(question) and not wants_chart:
-        try:
-            llm_messages = prev_messages + [user_message]
-            llm_resp = await llm.ainvoke(llm_messages)
-            if isinstance(llm_resp, (AIMessage,)) and getattr(llm_resp, "content", None):
-                return llm_resp.content, None
-            return str(llm_resp), None
-        except Exception as e:
-            logger.error(f"Conversational LLM failed: {e}")
-            # Fallback to agent path if LLM direct fails
     
     active_agent = session_agent if session_agent is not None else agent
     if not active_agent: