fix(ai): supersede old product picks

tests/test_frontend_v2_assets.py

@@ -197,6 +197,8 @@ def test_ai_product_pick_agent_uses_real_competitor_data_and_dashboard_action():
     assert "evidence_quality" in agent_source
     assert "opportunity_score" in agent_source
     assert "margin_rate" in agent_source
+    assert "_supersede_old_picks" in agent_source
+    assert "status = 'superseded'" in agent_source
     assert "{date_col}::date" in agent_source
     assert "conn.rollback()" in agent_source