feat: 账户方向与币种白名单 env 开关（三所）

Per-instance TRADE_DIRECTION / TRADE_SYMBOL_WHITELIST restricts UI and API for manual orders, key monitors, and strategies; includes sync script for deployment profiles.

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

lib/trade/trade_policy_app_lib.py

@@ -0,0 +1,52 @@
+"""Flask 实例接入 trade policy（三所 app.py 共用）。"""
+from __future__ import annotations
+
+from typing import Callable, Tuple
+
+from lib.trade.trade_policy_lib import (
+    TradePolicy,
+    assert_direction_allowed,
+    assert_symbol_allowed,
+    assert_trade_policy_open,
+    trade_policy_to_dict,
+)
+
+
+def trade_policy_template_context(policy: TradePolicy) -> dict:
+    return trade_policy_to_dict(policy)
+
+
+def default_symbol_for_policy(policy: TradePolicy, raw_default: str) -> str:
+    d = (raw_default or "BTC/USDT").strip() or "BTC/USDT"
+    if policy.symbol_restrict_enabled and policy.symbol_whitelist:
+        from lib.trade.trade_policy_lib import symbol_base_coin
+
+        base = symbol_base_coin(d)
+        if base not in policy.symbol_whitelist:
+            return f"{policy.symbol_whitelist[0]}/USDT"
+    return d
+
+
+def check_symbol_policy(
+    policy: TradePolicy,
+    symbol: str,
+    normalize_symbol_fn: Callable[[str], str],
+) -> Tuple[bool, str]:
+    return assert_symbol_allowed(
+        policy, symbol, normalize_symbol_fn=normalize_symbol_fn
+    )
+
+
+def check_direction_policy(policy: TradePolicy, direction: str) -> Tuple[bool, str]:
+    return assert_direction_allowed(policy, direction)
+
+
+def check_open_policy(
+    policy: TradePolicy,
+    symbol: str,
+    direction: str,
+    normalize_symbol_fn: Callable[[str], str],
+) -> Tuple[bool, str]:
+    return assert_trade_policy_open(
+        policy, symbol, direction, normalize_symbol_fn=normalize_symbol_fn
+    )