Improve options order estimates and chain filter defaults.

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

lib/options/options_pricing_lib.py

@@ -298,16 +298,15 @@ def format_options_breakeven_line(
     return " ".join(parts)
 
 
-def estimate_expiry_profit_at_index(
+def estimate_expiry_value_at_index(
     *,
     opt_type: str,
     strike: float | None,
     target_idx: float | None,
-    entry_px: float | None,
     eth_amount: float | None,
 ) -> float | None:
-    """到期测算:目标指数价下按内在价值减权利金(每 1 币报价 × 币量)."""
-    if strike is None or target_idx is None or entry_px is None or eth_amount is None:
+    """到期测算:目标指数价下期权内在价值总额(不含已付权利金)."""
+    if strike is None or target_idx is None or eth_amount is None:
         return None
     if eth_amount <= 0:
         return None
@@ -318,7 +317,33 @@ def estimate_expiry_profit_at_index(
         intrinsic = max(0.0, float(strike) - float(target_idx))
     else:
         return None
-    return round((intrinsic - float(entry_px)) * float(eth_amount), 4)
+    return round(intrinsic * float(eth_amount), 2)
+
+
+def estimate_expiry_profit_at_index(
+    *,
+    opt_type: str,
+    strike: float | None,
+    target_idx: float | None,
+    entry_px: float | None,
+    eth_amount: float | None,
+    total_premium: float | None = None,
+) -> float | None:
+    """到期测算:目标指数价下净盈利 = 预计价值 − 权利金."""
+    value = estimate_expiry_value_at_index(
+        opt_type=opt_type,
+        strike=strike,
+        target_idx=target_idx,
+        eth_amount=eth_amount,
+    )
+    if value is None:
+        return None
+    prem = total_premium
+    if prem is None and entry_px is not None and eth_amount is not None:
+        prem = float(entry_px) * float(eth_amount)
+    if prem is None:
+        return None
+    return round(float(value) - float(prem), 2)
 
 
 def equivalent_contract_leverage(