feat(字体处理): 优化字体与文案，修复文档隔离

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/tdewolff/font v0.0.0-20260913163313-54f98bb59ee6
 	github.com/xiaoqidun/j2kgo v0.0.0-20261009063910-4865a21ef893
 	github.com/xiaoqidun/jbig2 v1.1.4
-	github.com/xiaoqidun/pdfgo v0.0.0-20261010014421-57af90cea2c6
+	github.com/xiaoqidun/pdfgo v0.0.0-20261010042215-c8c66c83f031
 	golang.org/x/crypto v0.58.0
 	golang.org/x/image v0.47.0
 	golang.org/x/text v0.43.0