fix(hub): merge mark price from Flask snapshot and fix board refresh

Sync hub positions with instance price_snapshot (order_prices and position_marks).
Fix monitor board UI when hub restarts (version rewind) and queue snapshot fetches.
Expose board aggregate status on /api/ping for diagnostics.

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

manual_trading_hub/agent.py

@@ -31,6 +31,7 @@ _REPO_ROOT = Path(__file__).resolve().parents[1]
 if str(_REPO_ROOT) not in sys.path:
     sys.path.insert(0, str(_REPO_ROOT))
 from hub_ohlcv_lib import format_price_by_tick, price_tick_from_market
+from hub_position_metrics import parse_position_mark_price
 
 import ccxt
 from fastapi import FastAPI, Header, HTTPException, Request
@@ -409,29 +410,8 @@ def _position_entry_price(p: dict[str, Any]) -> float | None:
 
 
 def _position_mark_price(p: dict[str, Any]) -> float | None:
-    """四所 ccxt 持仓统一解析标记价（用于强平/浮盈计算）。"""
-    info = p.get("info") or {}
-    if not isinstance(info, dict):
-        info = {}
-    for key in (
-        p.get("markPrice"),
-        p.get("mark_price"),
-        p.get("mark"),
-        info.get("markPx"),
-        info.get("mark_price"),
-        info.get("markPrice"),
-        info.get("last"),
-        info.get("lastPrice"),
-    ):
-        px = _finite_or_none(key)
-        if px is not None and px > 0:
-            return px
-    contracts = _position_contracts(p)
-    if abs(contracts) >= 1e-12:
-        notional = _finite_or_none(p.get("notional"))
-        if notional is not None and abs(notional) > 0:
-            return abs(notional) / abs(contracts)
-    return None
+    """四所 ccxt 持仓统一解析标记价（与实例 parse_ccxt_position_metrics 一致）。"""
+    return parse_position_mark_price(p)
 
 
 def _ticker_mark_price(ex: Any, symbol: str) -> float | None: