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/api/funds.py

@@ -115,9 +115,13 @@ async def funds_summary(_user: Annotated[str, Depends(require_user)]) -> dict[st
                 trading_usdt = bal.get("trading_usdt")
                 funding_usdc = bal.get("funding_usdc")
                 trading_usdc = bal.get("trading_usdc")
-                parts = [funding_usdt, trading_usdt, funding_usdc, trading_usdc]
-                vals = [float(x) for x in parts if x is not None]
-                total = round(sum(vals), 2) if vals else None
+                r = float(rate) if rate and rate > 0 else 1.0
+                total = round(
+                    (funding_usdt or 0.0)
+                    + (trading_usdt or 0.0)
+                    + ((funding_usdc or 0.0) + (trading_usdc or 0.0)) * r,
+                    2,
+                )
             except Exception as e:
                 return {
                     "ok": False,
@@ -128,11 +132,13 @@ async def funds_summary(_user: Annotated[str, Depends(require_user)]) -> dict[st
             finally:
                 client.close()
         else:
-            # 非 OKX LIVE：回退本地账本
-            led = Ledger(db).snapshot()
-            trading_usdt = float(led["equity"])
-            total = trading_usdt
-
+            # 非 OKX LIVE：暂无统一资金接口，不回退模拟账本（避免实盘显示假资金）
+            return {
+                "ok": False,
+                "mode": mode,
+                "exchange": exchange,
+                "detail": f"{exchange} 实盘资金摘要暂未接入，请用 OKX 或交易所 App 查看",
+            }
     return {
         "ok": True,
         "mode": mode,

backend/app/api/settings.py

@@ -37,6 +37,7 @@ KEYS = (
     "skip_weekends",
     "initial_equity",
     "leverage",
+    "perp_margin_mode",
     "min_option_hours",
     "min_option_leverage",
     "atm_open_offset_enabled",
@@ -61,6 +62,7 @@ class StrategySettingsBody(BaseModel):
     skip_weekends: bool | None = None
     initial_equity: float | None = Field(default=None, ge=1000, le=10_000_000)
     leverage: float | None = Field(default=None, ge=1, le=125)
+    perp_margin_mode: str | None = Field(default=None, pattern="^(cross|isolated)$")
     min_option_hours: float | None = Field(default=None, ge=1, le=720)
     min_option_leverage: float | None = Field(default=None, ge=1, le=10000)
     atm_open_offset_enabled: bool | None = None
@@ -117,6 +119,20 @@ def _read_settings() -> dict:
             db.get_setting("initial_equity", str(s.initial_equity)) or s.initial_equity
         ),
         "leverage": float(db.get_setting("leverage", str(s.leverage)) or s.leverage),
+        "perp_margin_mode": (
+            mm
+            if (
+                mm := str(
+                    db.get_setting("perp_margin_mode", s.perp_margin_mode)
+                    or s.perp_margin_mode
+                    or "cross"
+                )
+                .strip()
+                .lower()
+            )
+            in ("cross", "isolated")
+            else "cross"
+        ),
         "min_option_hours": float(
             db.get_setting("min_option_hours", str(s.min_option_hours))
             or s.min_option_hours