简化行情数据页面，修复同步数据无法补全历史的问题

ft-app/app/routers/contracts.py

@@ -35,11 +35,6 @@ def contract_index(request: Request, db: Session = Depends(get_db)):
         if bar.contract not in contract_bars:
             contract_bars[bar.contract] = bar
 
-    total_bars = db.query(DailyBar).count()
-    latest_bar = (
-        db.query(DailyBar).order_by(DailyBar.date.desc()).first()
-    )
-
     template = request.app.state.templates.get_template("index.html")
     return HTMLResponse(
         template.render(
@@ -47,8 +42,6 @@ def contract_index(request: Request, db: Session = Depends(get_db)):
             active_nav="contracts",
             contracts=active_contracts,
             contract_bars=contract_bars,
-            total_bars=total_bars,
-            latest_date=latest_bar.date.strftime("%Y-%m-%d") if latest_bar else "—",
         )
     )