fix: add try/except to capture pipeline visual error message

app.py

@@ -906,24 +906,15 @@ def api_xau_brief():
 @app.route("/api/pipeline/visual/<asset>", methods=["GET"])
 def pipeline_visual_asset(asset):
     """Pipeline visual específico por ativo (USD/XAU simulado via DB)."""
+    try:
         conn = _db_conn(DB_PATH)
         conn.row_factory = sqlite3.Row
         c = conn.cursor()
 
         last = c.execute("SELECT * FROM pipeline_runs ORDER BY started_at DESC LIMIT 1").fetchone()
         last_5 = c.execute("SELECT * FROM pipeline_runs ORDER BY started_at DESC LIMIT 5").fetchall()
-
-    stats = c.execute("""
-        SELECT agent, COUNT(*) as total,
-               SUM(CASE WHEN status='success' THEN 1 ELSE 0 END) as ok,
-               MAX(timestamp) as last_ts
-        FROM executions GROUP BY agent
-    """).fetchall()
-
         conn.close()
 
-    # Busca último pipeline do ativo ou genérico
-    current_state = state.get_all()
         last_run = dict(last) if last else {}
 
         asset_labels = {"btc": "Bitcoin", "usd": "Dólar USD/BRL", "xau": "Ouro XAU/USD"}
@@ -963,6 +954,9 @@ def pipeline_visual_asset(asset):
         } for r in last_5]
 
         return jsonify({"nodes": nodes, "recent_runs": recent_runs, "asset": asset})
+    except Exception as e:
+        app.logger.error(f"Pipeline visual asset error: {e}")
+        return jsonify({"error": str(e), "asset": asset}), 500
 
 # ── Multi-Asset: Portfolio Live ──────────────────────────────────────────────
 @app.route("/api/portfolio/<asset>", methods=["GET"])