feat: extend comprehensive monthly settlement snapshots (#18)

dashboard/page_views/monthly_settlement.py

@@ -9,6 +9,7 @@ import streamlit as st
 
 from jarca_ledger_mcp.adapters.streamlit import overview_gateway
 from jarca_ledger_mcp.adapters.streamlit import reconciliation_gateway
+from jarca_ledger_mcp.adapters.streamlit import settlement_gateway
 from dashboard.page_views.settlement_drafts import render_settlement_drafts
 from dashboard.common import *  # noqa: F403, F405
 
@@ -267,6 +268,20 @@ def page_monthly_settlement(db_path: str) -> None:
         st.markdown(f"- {action}")
 
     st.divider()
+    st.markdown("### 저장된 월정산 스냅샷")
+    st.caption("아래는 저장 시점의 불변 기록이며 위의 live KPI/리포트와 별도입니다.")
+    exact_run = st.text_input("정확한 run ID (선택)", key="saved_settlement_run_id")
+    saved = settlement_gateway.get_monthly_settlement_snapshot(month=selected_month, run_id=exact_run, db_path=db_path)
+    if not saved.get("success"):
+        st.info("저장된 스냅샷이 없거나 조회할 수 없습니다.")
+    else:
+        snapshot = saved.get("snapshot", saved)
+        st.caption(f"run {snapshot.get('run_id', '미보존')} · 버전 {snapshot.get('aggregation_version', 'legacy')} · 출처 {snapshot.get('source', '미보존')}")
+        for key, label in (("income_total", "수입"), ("expense_total", "지출"), ("net_cashflow", "순현금흐름"), ("total_assets", "자산"), ("total_liabilities", "부채"), ("net_worth", "순자산")):
+            st.write(label, snapshot.get(key) if snapshot.get(key) is not None else "미보존")
+        rows = snapshot.get("cashflow_items", [])
+        if isinstance(rows, list): st.dataframe([{k: row.get(k) for k in ("cashflow_kind", "category", "subcategory", "amount", "transaction_count", "currency")} for row in rows if isinstance(row, dict)])
+    st.divider()
     render_settlement_drafts(db_path=db_path, month=selected_month)
 
     st.divider()