Fix semi moneyness reset and show Call/Put ladder by view.

Use dirty ref so refresh cannot overwrite unsaved params; ladder fetches books for the selected side.

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

backend/app/api/market.py

@@ -21,14 +21,15 @@ async def market_snapshot(_user: Annotated[str, Depends(require_user)]) -> dict:
 @router.get("/option-ladder")
 async def market_option_ladder(
     _user: Annotated[str, Depends(require_user)],
-    wings: int = Query(default=4, ge=1, le=12),
+    wings: int = Query(default=5, ge=1, le=12),
+    side: str = Query(default="call", pattern="^(call|put)$"),
 ) -> dict:
-    """半自动页 T 型报价：ATM 上下各 wings 档。"""
+    """半自动页单边报价列表：ATM 上下各 wings 档；side=call|put。"""
     gw = get_gateway()
     ladder = getattr(gw, "option_ladder", None)
     if not callable(ladder):
         raise HTTPException(status_code=501, detail="当前会话不支持 option-ladder")
-    return ladder(wings=wings)
+    return ladder(wings=wings, side=side)
 
 
 @router.post("/realign")