fix(hub): show contract-based unrealized PnL in monitor and chart

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

hub_position_metrics.py

@@ -56,6 +56,69 @@ def position_side_from_ccxt(p: dict[str, Any], contracts: float | None = None) -
     return "long"
 
 
+def parse_position_entry_price(p: dict[str, Any]) -> float | None:
+    """四所 ccxt 持仓开仓均价。"""
+    if not isinstance(p, dict):
+        return None
+    info = p.get("info") or {}
+    if not isinstance(info, dict):
+        info = {}
+    return _coerce_float(
+        p.get("entryPrice"),
+        p.get("entry_price"),
+        p.get("average"),
+        info.get("entryPrice"),
+        info.get("entry_price"),
+        info.get("avgPx"),
+        info.get("avgEntryPrice"),
+        info.get("avg_entry_price"),
+        info.get("avgPrice"),
+        info.get("openAvgPx"),
+    )
+
+
+def estimate_linear_swap_upnl_usdt(
+    side: str,
+    entry: float | None,
+    mark: float | None,
+    contracts: float | None,
+    contract_size: float | None = None,
+) -> float | None:
+    """U 本位线性永续：浮盈 = (标记价 - 开仓价) × 张数 × contractSize（空头取反）。"""
+    e = _finite_or_none(entry)
+    m = _finite_or_none(mark)
+    c = _finite_or_none(contracts)
+    if e is None or m is None or c is None or c <= 0:
+        return None
+    mult = _finite_or_none(contract_size)
+    if mult is None or mult <= 0:
+        mult = 1.0
+    diff = (m - e) if (side or "long").strip().lower() == "long" else (e - m)
+    return round(diff * abs(c) * mult, 2)
+
+
+def resolve_position_display_upnl(
+    side: str,
+    entry: float | None,
+    mark: float | None,
+    contracts: float | None,
+    contract_size: float | None,
+    exchange_upnl: float | None,
+) -> float | None:
+    """展示用浮盈：优先与标记价/张数一致的推算；与交易所值偏差过大时用推算值。"""
+    computed = estimate_linear_swap_upnl_usdt(
+        side, entry, mark, contracts, contract_size
+    )
+    if computed is None:
+        return exchange_upnl
+    if exchange_upnl is None:
+        return computed
+    ref = max(abs(computed), 1.0)
+    if abs(exchange_upnl - computed) / ref > 0.2:
+        return computed
+    return exchange_upnl
+
+
 def parse_position_unrealized_pnl(p: dict[str, Any]) -> float | None:
     """四所 ccxt 持仓统一解析未实现盈亏（Gate 常在 info.unrealised_pnl）。"""
     if not isinstance(p, dict):