From 1688fa96337cc5289d4315d316e13d9531263611 Mon Sep 17 00:00:00 2001
From: WrBug <iwrbug@gmail.com>
Date: Thu, 26 Feb 2026 21:30:18 +0800
Subject: [PATCH] =?UTF-8?q?feat(frontend):=20=E4=BC=98=E5=8C=96"=E6=9C=80?=
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- 修改前：只能整数数量，导致余额浪费
  - 示例：余额2.95U，价格0.86 → 数量3张（浪费0.37U）
- 修改后：保留2位小数，充分利用余额
  - 示例：余额2.95U，价格0.86 → 数量3.43张（利用全部余额）

Made-with: Cursor
---
 frontend/src/pages/CryptoTailMonitor.tsx | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/frontend/src/pages/CryptoTailMonitor.tsx b/frontend/src/pages/CryptoTailMonitor.tsx
index bd9014f..091310f 100644
--- a/frontend/src/pages/CryptoTailMonitor.tsx
+++ b/frontend/src/pages/CryptoTailMonitor.tsx
@@ -886,9 +886,10 @@ const CryptoTailMonitor: React.FC = () => {
       return
     }
     
-    // 最大数量 = Math.floor(可用余额 / 价格)
-    const maxSize = Math.floor(balance / price)
+    // 最大数量 = 余额 / 价格，保留2位小数
+    let maxSize = Math.floor((balance / price) * 100) / 100
     
+    // 确保至少 1 张
     if (maxSize < 1) {
       message.warning(t('cryptoTailMonitor.manualOrder.insufficientBalanceForMax'))
       return