交易记录优化：品种合约分离展示、盈亏取整、手续费统计

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ft-app/app/routers/trades.py

@@ -3,7 +3,7 @@ from fastapi import APIRouter, Depends, Form, Request
 from fastapi.responses import HTMLResponse, RedirectResponse
 from sqlalchemy.orm import Session
 from app.database import get_db
-from app.models import Trade, Product, Contract
+from app.models import Trade, Contract, Product
 
 router = APIRouter(prefix="/trades", tags=["trades"])
 
@@ -20,11 +20,6 @@ def get_active_contracts(db: Session) -> list[str]:
     return [c[0] for c in contracts]
 
 
-def get_products(db: Session) -> list[str]:
-    products = db.query(Product.code).order_by(Product.code).all()
-    return [p[0] for p in products]
-
-
 def today_str() -> str:
     return date.today().isoformat()
 
@@ -46,7 +41,6 @@ def trades_page(request: Request, db: Session = Depends(get_db)):
             request=request,
             active_nav="trades",
             contracts=get_active_contracts(db),
-            products=get_products(db),
             directions=DIRECTIONS,
             open_trades=open_trades,
             closed_trades=closed_trades,
@@ -58,7 +52,6 @@ def trades_page(request: Request, db: Session = Depends(get_db)):
 @router.post("/open")
 def open_trade(
     request: Request,
-    product_code: str = Form(...),
     contract_code: str = Form(...),
     direction: str = Form(...),
     open_date: str = Form(...),
@@ -66,9 +59,13 @@ def open_trade(
     open_fee: float = Form(0.0),
     db: Session = Depends(get_db),
 ):
+    code = contract_code.upper()
+    contract = db.query(Contract).filter(Contract.code == code).first()
+    product_code = contract.product.code if contract else code[:2]
+
     t = Trade(
-        product_code=product_code.upper(),
-        contract_code=contract_code.upper(),
+        product_code=product_code,
+        contract_code=code,
         direction=direction,
         open_date=date.fromisoformat(open_date),
         open_price=open_price,