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/strategy/strategy_trend_register.py

@@ -257,6 +257,11 @@ def precheck_trend_start(cfg: dict, conn, *, symbol: str = "", direction: str =
         pass
     sym = (symbol or "").strip()
     dir_l = (direction or "long").strip().lower()
+    validate_fn = getattr(m, "validate_trade_policy_open", None)
+    if callable(validate_fn) and sym:
+        ok_pol, pol_msg = validate_fn(sym, dir_l)
+        if not ok_pol:
+            return False, pol_msg
     if sym and dir_l in ("long", "short") and hasattr(m, "precheck_risk"):
         ok_risk, risk_msg = m.precheck_risk(conn, sym, dir_l)
         if not ok_risk: