Add Binance live trading, anti-stuck open/close recovery, and configurable rate limits.

OKX/Binance LIVE share half_open and option_closed_perp_pending repair paths; private REST throttles default to 1s and are tunable in settings.

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

backend/tests/test_live_recovery.py

@@ -0,0 +1,69 @@
+"""实盘防卡状态：half_open / option_closed_perp_pending。"""
+
+from __future__ import annotations
+
+from app.sim.ledger import Ledger
+from app.sim.matcher import BLOCKING_STATUSES, Matcher
+
+
+def test_blocking_statuses_include_repair_states() -> None:
+    assert "half_open" in BLOCKING_STATUSES
+    assert "option_closed_perp_pending" in BLOCKING_STATUSES
+    assert "open" in BLOCKING_STATUSES
+
+
+def test_has_open_position_blocks_half_open(tmp_path, monkeypatch) -> None:
+    monkeypatch.setenv("MODE", "SIM")
+    from app.models.db import Database
+
+    db = Database(tmp_path / "t.db")
+    m = Matcher(db)
+    assert m.has_open_position() is False
+
+    with db._lock:
+        db._conn.execute(
+            """UPDATE positions SET
+                group_id=?, option_inst_id=?, option_side=?, option_qty_eth=?,
+                option_qty_contracts=?, option_entry_px=?, status=?
+                WHERE id=1""",
+            ("G-test", "ETH-OPT", "call", 2.0, 200.0, 10.0, "half_open"),
+        )
+        db._conn.commit()
+
+    assert m.has_open_position() is True
+    assert m.position_status() == "half_open"
+
+    with db._lock:
+        db._conn.execute(
+            "UPDATE positions SET status='option_closed_perp_pending' WHERE id=1"
+        )
+        db._conn.commit()
+    assert m.has_open_position() is True
+
+    with db._lock:
+        db._conn.execute(
+            """UPDATE positions SET
+                group_id=NULL, option_inst_id=NULL, status='flat' WHERE id=1"""
+        )
+        db._conn.commit()
+    assert m.has_open_position() is False
+    db.close()
+
+
+def test_ledger_allow_negative(tmp_path) -> None:
+    from app.models.db import Database
+
+    db = Database(tmp_path / "l.db")
+    ledger = Ledger(db)
+    # 掏空
+    snap = ledger.snapshot()
+    ledger.apply_cash(-snap["available"], kind="drain", note="drain")
+    try:
+        ledger.apply_cash(-1.0, kind="fail", note="should fail")
+        assert False, "expected RuntimeError"
+    except RuntimeError:
+        pass
+    # LIVE 镜像允许透支
+    bal = ledger.apply_cash(-1.0, kind="live", note="ok", allow_negative=True)
+    assert bal < 0
+    db.close()