Show bid/ask liquidity as price per sheet in options chain.

Display OKX askSz and bidSz beside top-of-book prices in the chain table and order panel using price/sheets format.

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

lib/options/options_pricing_lib.py

@@ -28,6 +28,24 @@ def premium_per_sheet(quote_per_unit: float, ct_mult: float = 0.01) -> float:
     return float(quote_per_unit) * float(ct_mult)
 
 
+def format_quote_liquidity(px: float | None, sz: float | None, *, px_decimals: int = 4) -> str | None:
+    """盘口展示：价格/张数，如 17.2/150。"""
+    if px is None:
+        return None
+    try:
+        price = f"{float(px):.{px_decimals}f}".rstrip("0").rstrip(".")
+    except (TypeError, ValueError):
+        return None
+    if sz is None:
+        return price
+    try:
+        s = float(sz)
+        size = str(int(s)) if abs(s - int(s)) < 1e-9 else str(s).rstrip("0").rstrip(".")
+    except (TypeError, ValueError):
+        return price
+    return f"{price}/{size}"
+
+
 def total_premium(quote_per_unit: float, eth_amount: float, ct_mult: float = 0.01) -> float:
     return float(quote_per_unit) * float(eth_amount)