feat(persistence): C-S3实走跨日状态—paper_pending_orders+positions/last_balance存取

tests/trader/test_persistence.py

@@ -3,6 +3,8 @@ from sanguo_trader.persistence import (
     init_db, save_account, save_trade, save_daily_balance,
     update_account_status, update_checkpoint, load_checkpoint,
     list_trades, list_daily_balance,
+    save_pending_orders, load_pending_orders,
+    save_positions, load_positions, load_last_balance,
 )
 
 
@@ -13,6 +15,36 @@ def test_init_and_save_account(tmp_path):
     assert aid > 0
 
 
+def test_pending_orders_roundtrip(tmp_path):
+    """C-S3 实走跨日 pending 订单持久化（覆盖式）。"""
+    db = str(tmp_path / "p.db")
+    init_db(db)
+    aid = save_account(db, {"name": "t"})
+    save_pending_orders(db, aid, [
+        {"strategy_id": "s1", "symbol": "600000", "side": "buy", "price": 10.5,
+         "volume": 100, "is_market": True, "match_session": "next_open", "listing_days": 0},
+    ])
+    loaded = load_pending_orders(db, aid)
+    assert len(loaded) == 1 and loaded[0]["symbol"] == "600000"
+    assert loaded[0]["is_market"] is True and loaded[0]["volume"] == 100
+    save_pending_orders(db, aid, [])   # 覆盖式清空
+    assert load_pending_orders(db, aid) == []
+
+
+def test_positions_and_last_balance_roundtrip(tmp_path):
+    """C-S3 实走 positions 快照 + 最后余额恢复。"""
+    db = str(tmp_path / "p.db")
+    init_db(db)
+    aid = save_account(db, {"name": "t", "initial_capital": 1_000_000})
+    save_positions(db, aid, "account",
+                   {"600000": {"volume": 200, "frozen": 0, "avg_price": 10.5}}, "2024-01-02")
+    pos = load_positions(db, aid, "account")
+    assert pos["600000"]["volume"] == 200 and pos["600000"]["avg_price"] == 10.5
+    save_daily_balance(db, aid, "2024-01-02", 99795.0, 2100.0, 101895.0)
+    bal = load_last_balance(db, aid)
+    assert bal["cash"] == 99795.0 and bal["date"] == "2024-01-02"
+
+
 def test_save_trade_and_list(tmp_path):
     db = str(tmp_path / "p.db")
     init_db(db)