fix: preserve correction and legacy authority semantics

tests/test_asset_snapshots.py

@@ -61,7 +61,9 @@ def test_snapshot_rows_are_append_only_and_timeseries_uses_same_formula(tmp_path
 
     may = service.get_asset_snapshot_report("2026-05-31", db_path=db_path)
     assert may["success"] is True
-    assert may["source"] == "asset_snapshots"
+    assert may["source"] == "legacy_asset_snapshots"
+    assert may["is_closed_snapshot"] is False
+    assert may["close_status"] == "legacy_read_only"
     assert may["snapshot_count"] == 3
     assert may["net_worth"] == 121_000_000
 

tests/test_issue_12_regressions.py

@@ -180,6 +180,26 @@ def test_candidate_idempotency_rejects_changed_payload(tmp_path):
     assert conflict["error_code"] == "idempotency_conflict"
 
 
+def test_correction_idempotency_compares_effective_preserved_payload(tmp_path):
+    path = str(tmp_path / "ledger.sqlite3")
+    account = service.create_ledger_account("계좌", db_path=path)["account"]["id"]
+    original = service.register_account_valuation(
+        account, "2026-06-30", 100, memo="original",
+        verification_status="verified", idempotency_key="original", db_path=path,
+    )["valuation"]
+    first = service.correct_account_valuation(
+        original["id"], 200, "정정", memo="override",
+        idempotency_key="correction", db_path=path,
+    )
+    retry_with_omitted_memo = service.correct_account_valuation(
+        original["id"], 200, "정정",
+        idempotency_key="correction", db_path=path,
+    )
+    assert first["success"] is True
+    assert retry_with_omitted_memo["success"] is False
+    assert retry_with_omitted_memo["error_code"] == "idempotency_conflict"
+
+
 def test_valuation_currency_and_loan_kind_are_rejected(tmp_path):
     path = str(tmp_path / "ledger.sqlite3")
     bank = service.create_ledger_account("은행", currency="KRW", db_path=path)["account"]["id"]
@@ -331,6 +351,22 @@ def test_snapshot_rejects_bogus_selection_policy_and_manual_usd_is_excluded(tmp_
     assert any(item.get("reason") == "non_krw_without_fx" for item in report["excluded_items"])
 
 
+def test_legacy_snapshot_rows_do_not_override_live_authority_or_claim_closed(tmp_path):
+    path = str(tmp_path / "ledger.sqlite3")
+    service.create_asset_snapshot(
+        "2026-06-30", "account", "legacy", "legacy", 999, "cash", db_path=path,
+    )
+    account = service.create_ledger_account("현재 계좌", db_path=path)["account"]["id"]
+    service.register_account_valuation(
+        account, "2026-06-30", 100, verification_status="verified", db_path=path,
+    )
+    report = service.get_asset_snapshot_report("2026-06-30", db_path=path)
+    assert report["source"] == "live_authority"
+    assert report["is_closed_snapshot"] is False
+    assert report["total_assets"] == 100
+    assert report["legacy_snapshot_row_count"] == 1
+
+
 def test_account_write_rolls_back_when_conn_level_candidate_write_fails(tmp_path, monkeypatch):
     path = str(tmp_path / "ledger.sqlite3")
     import jarca_ledger_mcp.application.accounts_write_services as writes