fix: 修复首页、订单和成交记录页面的空行问题

Author: jamiesun

dashboard/pages/home.py

@@ -24,7 +24,7 @@ def show_home_page(api):
             with col1:
                 st.metric("👥 用户总数", total_users)
             with col2:
-                st.metric("📈 交易对", "2", delta="BTC/USDT, ETH/USDT")
+                st.metric("📈 交易对", "2")
             with col3:
                 # 尝试获取订单统计
                 try:

dashboard/pages/orders.py

@@ -61,7 +61,7 @@ def show_orders_page(api):
         if isinstance(orders, str):
             st.error(f"❌ API 返回错误: {orders}")
             return
-        
+
         if not orders or not isinstance(orders, list) or len(orders) == 0:
             st.info("📭 暂无订单数据")
         else:

dashboard/pages/trades.py

@@ -37,7 +37,7 @@ def show_trades_page(api):
         if isinstance(trades, str):
             st.error(f"❌ API 返回错误: {trades}")
             return
-        
+
         if not trades or not isinstance(trades, list) or len(trades) == 0:
             st.info(f"📭 暂无 {symbol_filter} 的成交记录")
         else: