Support LIVE exchange funds and perp margin mode.

Hide sim equity when LIVE is selected; OKX funds bar uses exchange balances; add cross/isolated for perp only (options stay cash).

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

backend/app/strategy/engine.py

@@ -83,6 +83,13 @@ class StrategyEngine:
         rest_sec = self.ledger.get_setting_int("rest_seconds", s.rest_seconds)
         skip_weekends = self.ledger.get_setting_bool("skip_weekends", s.skip_weekends)
         leverage = self.ledger.get_setting_float("leverage", s.leverage)
+        perp_mm = str(
+            self.ledger.get_setting_str("perp_margin_mode", s.perp_margin_mode)
+            or s.perp_margin_mode
+            or "cross"
+        ).strip().lower()
+        if perp_mm not in ("cross", "isolated"):
+            perp_mm = "cross"
         min_hours = self.ledger.get_setting_float("min_option_hours", s.min_option_hours)
         min_opt_lev = self.ledger.get_setting_float(
             "min_option_leverage", s.min_option_leverage
@@ -140,6 +147,7 @@ class StrategyEngine:
             "premium_exit_multiple": prem_mult,
             "exit_target_usdt": exit_amt,
             "leverage": leverage,
+            "perp_margin_mode": perp_mm,
             "perp_qty_eth": perp_qty,
             "option_qty_eth": opt_qty,
             "min_option_hours": min_hours,