fix(gate-bot): format mark price with exchange symbol precision

Use price_to_precision in price_snapshot so live mark price matches entry/SL display instead of fixed 8 decimals.

order_monitor_display_lib.py

@@ -119,6 +119,33 @@ def enrich_order_display_fields(item: dict[str, Any], calc_rr_ratio_fn: Callable
     return item
 
 
+def apply_order_live_price_display(
+    payload: dict[str, Any],
+    symbol: Any,
+    ticker_price: Any,
+    exchange_mark_price: Any,
+    format_price_fn: Callable[[Any, Any], str],
+) -> dict[str, Any]:
+    """标记价/现价展示：与交易所 price_to_precision 对齐，避免前端 toFixed(8)。"""
+    px_for_fmt = ticker_price
+    mark_raw = exchange_mark_price
+    if mark_raw is not None:
+        try:
+            px_for_fmt = float(mark_raw)
+        except (TypeError, ValueError):
+            pass
+    px_disp = format_price_fn(symbol, px_for_fmt)
+    payload["price_display"] = px_disp
+    if mark_raw is not None:
+        try:
+            payload["exchange_mark_price_display"] = format_price_fn(symbol, float(mark_raw))
+        except (TypeError, ValueError):
+            payload["exchange_mark_price_display"] = px_disp
+    else:
+        payload["exchange_mark_price_display"] = None
+    return payload
+
+
 def apply_order_price_display_fields(
     payload: dict[str, Any],
     *,