Fix Gate mark/PnL/TP-SL snapshot and intraday order UI

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

lib/hub/price_snapshot_lib.py

@@ -0,0 +1,75 @@
+"""price_snapshot 共用：订单行情价兜底，避免 get_price 失败时整单不入 order_prices。"""
+from __future__ import annotations
+
+from typing import Any, Callable, Mapping, Optional
+
+from lib.hub.hub_position_metrics import parse_position_mark_price
+
+
+def resolve_order_snapshot_price(
+    symbol: str,
+    prices: Mapping[str, float],
+    *,
+    position_row: Optional[dict[str, Any]] = None,
+    order_leverage=None,
+    parse_position_metrics_fn: Callable[..., dict[str, Any] | None] | None = None,
+    get_mark_price_fn: Callable[[str], float | None] | None = None,
+    fallback_entry: float | None = None,
+) -> float | None:
+    """
+    解析下单监控轮询用的现价/标记价，优先级：
+    1. 已批量拉取的 ticker last
+    2. get_symbol_mark_price（含 mark）
+    3. 交易所持仓 mark（parse_ccxt_position_metrics / parse_position_mark_price）
+    4. 计划成交价 trigger_price
+    """
+    sym = (symbol or "").strip()
+    if not sym:
+        return None
+
+    cached = prices.get(sym)
+    if cached is not None:
+        try:
+            v = float(cached)
+            if v > 0:
+                return v
+        except (TypeError, ValueError):
+            pass
+
+    if get_mark_price_fn is not None:
+        try:
+            mp = get_mark_price_fn(sym)
+            if mp is not None and float(mp) > 0:
+                return float(mp)
+        except Exception:
+            pass
+
+    if position_row:
+        mark = None
+        if parse_position_metrics_fn is not None:
+            try:
+                metrics = parse_position_metrics_fn(
+                    position_row, order_leverage=order_leverage
+                )
+                if isinstance(metrics, dict) and metrics.get("mark_price") is not None:
+                    mark = float(metrics["mark_price"])
+            except Exception:
+                mark = None
+        if mark is None or mark <= 0:
+            try:
+                mp = parse_position_mark_price(position_row)
+                if mp is not None and mp > 0:
+                    mark = float(mp)
+            except Exception:
+                mark = None
+        if mark is not None and mark > 0:
+            return mark
+
+    if fallback_entry is not None:
+        try:
+            entry = float(fallback_entry)
+            if entry > 0:
+                return entry
+        except (TypeError, ValueError):
+            pass
+    return None