Implement dual target-close paths and residual option expiry.

Document and enforce: A full dual-leg close, B perp-only when deep OTM with residual archive that does not block next open, and expiry settlement when target is missed.

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

frontend/src/labels.ts

@@ -3,6 +3,7 @@
 const STATUS_ZH: Record<string, string> = {
   open: "持仓中",
   closed: "已平仓",
+  option_residual: "期权残留待到期",
 };
 
 const SIDE_ZH: Record<string, string> = {
@@ -23,9 +24,10 @@ const ACTION_ZH: Record<string, string> = {
 };
 
 const CLOSE_REASON_ZH: Record<string, string> = {
-  fixed_usdt: "固定净盈利达标",
-  premium_multiple: "权利金倍数达标",
-  expiry: "到期自动全平",
+  fixed_usdt: "固定净盈利达标·双腿全平",
+  premium_multiple: "权利金倍数达标·双腿全平",
+  target_perp_only: "净盈利达标·只平永续(期权归档)",
+  expiry: "到期结算",
   emergency: "紧急全平",
   manual: "手动平仓",
   liquidity_retry: "流动性等待后续平仓",