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/live/executor.py

@@ -37,6 +37,16 @@ class OkxLiveExecutor(Matcher):
             self._trade = OkxTradeClient()
         return self._trade
 
+    def _perp_margin_mode(self) -> str:
+        """永续全仓/逐仓；期权始终 cash，不受此设置影响。"""
+        s = get_settings()
+        raw = str(
+            self.ledger.get_setting_str("perp_margin_mode", s.perp_margin_mode)
+            or s.perp_margin_mode
+            or "cross"
+        ).strip().lower()
+        return "isolated" if raw == "isolated" else "cross"
+
     def _guard_live(self) -> str | None:
         ok, reason = live_ready()
         if not ok:
@@ -145,9 +155,10 @@ class OkxLiveExecutor(Matcher):
             else:
                 side, pos_side = "sell", "short"
             leverage = self.ledger.get_setting_float("leverage", s.leverage)
+            mgn = self._perp_margin_mode()
             try:
                 client.set_leverage(
-                    perp_inst, leverage, mgn_mode="cross", pos_side=pos_side
+                    perp_inst, leverage, mgn_mode=mgn, pos_side=pos_side
                 )
             except Exception as e_lev:
                 logger.warning("okx set_leverage failed: %s", e_lev)
@@ -155,7 +166,7 @@ class OkxLiveExecutor(Matcher):
                 inst_id=perp_inst,
                 side=side,
                 sz=str(perp_sz),
-                td_mode="cross",
+                td_mode=mgn,
                 pos_side=pos_side,
             )
         except Exception as e:
@@ -642,7 +653,7 @@ class OkxLiveExecutor(Matcher):
                 inst_id=perp_inst,
                 side=side,
                 sz=str(perp_sz),
-                td_mode="cross",
+                td_mode=self._perp_margin_mode(),
                 pos_side=pos_side,
                 reduce_only=True,
             )
@@ -927,7 +938,7 @@ class OkxLiveExecutor(Matcher):
                 inst_id=perp_inst,
                 side=side,
                 sz=str(perp_sz),
-                td_mode="cross",
+                td_mode=self._perp_margin_mode(),
                 pos_side=pos_side,
                 reduce_only=True,
             )