距平衡改为行权价到平衡价的价差

Call 为 BE−K、Put 为 K−BE；链/下单/持仓统一；顺带修复 format_position_row 中 row_mode 引用顺序。

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

lib/options/options_pricing_lib.py

@@ -531,6 +531,25 @@ def idx_distance_to_be(idx_px: float | None, be_px: float | None) -> float | Non
     return round(float(be_px) - float(idx_px), 2)
 
 
+def strike_distance_to_be(
+    strike: float | None,
+    be_px: float | None,
+    *,
+    opt_type: str | None = None,
+) -> float | None:
+    """行权价到到期平衡价的价差(Call:BE−K, Put:K−BE)."""
+    if strike is None or be_px is None:
+        return None
+    k = float(strike)
+    be = float(be_px)
+    o = (opt_type or "").upper()
+    if o == "C":
+        return round(be - k, 2)
+    if o == "P":
+        return round(k - be, 2)
+    return round(abs(be - k), 2)
+
+
 def format_options_breakeven_line(
     *,
     expiry_be_px: float | None,

lib/options/templates/options_panel.html

@@ -380,4 +380,4 @@
     </div>
 </div>
 <script src="/static/options_expiry_countdown.js?v=1"></script>
-<script src="/static/options_panel.js?v=69"></script>
+<script src="/static/options_panel.js?v=70"></script>