feat: deliver schema 15 monthly settlement lifecycle

tests/test_comprehensive_settlement_adapters.py

@@ -283,6 +283,8 @@ def test_saved_monthly_panel_renders_real_conditional_exclusion_carry_and_approv
     monkeypatch.setattr(reconciliation_gateway, "get_balance_reconciliation_report", lambda *a, **k: {"success": True, "items": []})
     monkeypatch.setattr(settlement_gateway, "list_settlement_drafts", lambda *a, **k: {"success": True, "drafts": []})
     app = AppTest.from_string(
+        f"import streamlit as st\n"
+        f"st.query_params.update(page='월정산', month='2026-09')\n"
         f"from dashboard.page_views.monthly_settlement import page_monthly_settlement\n"
         f"page_monthly_settlement({path!r})", default_timeout=30).run()
     assert not app.exception, f"saved panel AppTest failed before field assertions: {app.exception}"
@@ -368,6 +370,8 @@ def test_saved_monthly_snapshot_renders_close_legacy_and_asset_evidence(monkeypa
     monkeypatch.setattr(settlement_gateway, "get_monthly_settlement_snapshot", lambda *a, **k: {"success": True, **snapshot})
     monkeypatch.setattr(settlement_gateway, "list_settlement_drafts", lambda *a, **k: {"success": True, "drafts": []})
     app = AppTest.from_string(
+        "import streamlit as st\n"
+        "st.query_params.update(page='월정산', month='2026-09')\n"
         "from dashboard.page_views.monthly_settlement import page_monthly_settlement\n"
         "page_monthly_settlement('synthetic-unused.sqlite3')", default_timeout=30)
     app.run()