修改

backend/app/routers/month_locks.py

@@ -14,7 +14,7 @@ def get_month_locks():
                 fiscal_year,
                 month,
                 is_locked,
-                locked_at,
+                (locked_at AT TIME ZONE 'UTC') AT TIME ZONE 'Asia/Tokyo' as locked_at,
                 locked_by
             FROM month_locks
             ORDER BY fiscal_year, month
@@ -39,11 +39,11 @@ def lock_month(fiscal_year: int, month: int):
                 locked_at,
                 locked_by
             )
-            VALUES (%s, %s, true, NOW(), %s)
+            VALUES (%s, %s, true, CURRENT_TIMESTAMP AT TIME ZONE 'Asia/Tokyo', %s)
             ON CONFLICT (fiscal_year, month)
             DO UPDATE
                SET is_locked = true,
-                   locked_at = NOW(),
+                   locked_at = CURRENT_TIMESTAMP AT TIME ZONE 'Asia/Tokyo',
                    locked_by = EXCLUDED.locked_by
         """, (
             fiscal_year,