Clear trade history when resetting sim equity.

Deleting groups/fills/residuals and resetting strategy counters keeps funds reset a clean slate.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/tests/test_reset_equity_clears_trades.py

@@ -0,0 +1,62 @@
+"""模拟资金重置时同步清空交易记录。"""
+
+from __future__ import annotations
+
+from app.models.db import Database
+from app.sim.ledger import Ledger
+
+
+def test_reset_equity_clears_trade_history(tmp_path, monkeypatch) -> None:
+    monkeypatch.setenv("MODE", "SIM")
+    db = Database(tmp_path / "reset.db")
+    with db._lock:
+        db._conn.execute(
+            """INSERT INTO groups(group_id, status, open_at_ms, close_at_ms, realized_pnl)
+               VALUES ('G1','closed',1,2,-5.0)"""
+        )
+        db._conn.execute(
+            """INSERT INTO fills(group_id, leg, action, side, inst_id, qty_eth,
+               fill_px, fee, slip, notional, ts_ms)
+               VALUES ('G1','perp','open','long','ETH-SWAP',1,2000,0.1,0,2000,1)"""
+        )
+        db._conn.execute(
+            """INSERT INTO residual_options(
+                 group_id, option_inst_id, option_side, option_qty_eth,
+                 option_entry_px, status, created_at_ms
+               ) VALUES ('G1','OPT','call',2,10,'pending',1)"""
+        )
+        db._conn.execute(
+            """INSERT INTO ledger_entries(group_id, kind, amount, balance_after, note, ts_ms)
+               VALUES ('G1','pnl',-5,9995,'t',2)"""
+        )
+        db._conn.execute(
+            """UPDATE strategy_state SET rounds_done=3, window_key='w', rest_until_ms=99
+               WHERE id=1"""
+        )
+        db._conn.commit()
+    db.set_setting("risk_last_k", "1.5")
+
+    Ledger(db).reset_equity(12000.0, note="test reset")
+
+    assert db.fetchone("SELECT COUNT(*) AS c FROM groups")["c"] == 0
+    assert db.fetchone("SELECT COUNT(*) AS c FROM fills")["c"] == 0
+    assert db.fetchone("SELECT COUNT(*) AS c FROM residual_options")["c"] == 0
+    entries = db.fetchall("SELECT kind, amount FROM ledger_entries")
+    assert len(entries) == 1
+    assert entries[0]["kind"] == "reset"
+    assert float(entries[0]["amount"]) == 12000.0
+    pos = db.fetchone("SELECT status, group_id FROM positions WHERE id=1")
+    assert pos["status"] == "flat"
+    assert pos["group_id"] is None
+    st = db.fetchone(
+        "SELECT rounds_done, window_key, rest_until_ms FROM strategy_state WHERE id=1"
+    )
+    assert int(st["rounds_done"]) == 0
+    assert st["window_key"] is None
+    assert st["rest_until_ms"] is None
+    assert db.get_setting("risk_last_k") is None
+    led = db.fetchone("SELECT equity, available, reserved FROM ledger_meta WHERE id=1")
+    assert float(led["equity"]) == 12000.0
+    assert float(led["available"]) == 12000.0
+    assert float(led["reserved"]) == 0.0
+    db.close()