From c6b930b6d6b4af947be5a2d6bb3bb16e5003119c Mon Sep 17 00:00:00 2001
From: hz4th_coder <hz4th_coder@tphai.com>
Date: Fri, 17 Jul 2026 13:30:26 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=E8=A1=A8=E6=A0=BC?=
 =?UTF-8?q?=E5=BA=95=E9=83=A8=E5=A4=9A=E4=BD=99=E7=A9=BA=E7=99=BD?=
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- 去掉高度计算中多余的 borderWidth * 2
- 调整边框绘制，向内偏移半个线宽
- 边框紧贴表格内容，无额外空白
---
 server.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/server.js b/server.js
index 3cd6ac7..027328e 100644
--- a/server.js
+++ b/server.js
@@ -694,7 +694,7 @@ function generateTableImage(params) {
     const headerHeight = fontSize * 2.5;
     const rowHeight = fontSize * 2.2;
     const titleHeight = title ? fontSize * 3 : 0;
-    const tableHeight = headerHeight + rows.length * rowHeight + borderWidth * 2;
+    const tableHeight = headerHeight + rows.length * rowHeight;
     const finalHeight = tableHeight + titleHeight;
 
     // 创建正式 canvas
@@ -763,8 +763,9 @@ function generateTableImage(params) {
     ctx.strokeStyle = themeConfig.borderColor;
     ctx.lineWidth = borderWidth;
 
-    // 外边框
-    ctx.strokeRect(0, startY, finalWidth, tableHeight);
+    // 外边框（向内偏移半个线宽，确保边框完全在画布内）
+    const offset = borderWidth / 2;
+    ctx.strokeRect(offset, startY + offset, finalWidth - borderWidth, tableHeight - borderWidth);
 
     // 横线
     ctx.beginPath();