From 574a6ee27798dff091da9e506df8a42bde1ad12f Mon Sep 17 00:00:00 2001
From: tolelom <98kimsungmin@naver.com>
Date: Fri, 13 Mar 2026 21:40:12 +0900
Subject: [PATCH] =?UTF-8?q?fix:=20DPI=20=EC=8A=A4=EC=BC=80=EC=9D=BC?=
 =?UTF-8?q?=EB=A7=81=20=EC=A0=95=EB=B0=80=EB=8F=84=20=EA=B0=9C=EC=84=A0=20?=
 =?UTF-8?q?=EB=B0=8F=20=ED=86=A0=ED=81=B0=20=ED=98=95=EC=8B=9D=20=EA=B2=80?=
 =?UTF-8?q?=EC=A6=9D?=
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- DPI 계산을 float64 기반으로 변경하여 반올림 정확도 향상
- JWT 토큰 3-part 형식 사전 검증 추가

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 main.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/main.go b/main.go
index fc4501b..0fccfef 100644
--- a/main.go
+++ b/main.go
@@ -220,8 +220,9 @@ func getSystemDPI() uint32 {
 }
 
 // dpiScale scales a base-96-DPI pixel value to the system DPI.
+// Uses floating-point to avoid precision loss on non-standard DPI values.
 func dpiScale(px int, dpi uint32) uintptr {
-	return uintptr(px * int(dpi) / 96)
+	return uintptr(int(float64(px)*float64(dpi)/96.0 + 0.5))
 }
 
 // ── Font helpers ─────────────────────────────────────────────────────────────
@@ -898,6 +899,10 @@ func handleURI(rawURI string) error {
 	if token == "" {
 		return fmt.Errorf("토큰이 없습니다")
 	}
+	// JWT는 점(.)으로 구분된 3파트 형식이어야 함
+	if parts := strings.Split(token, "."); len(parts) != 3 {
+		return fmt.Errorf("유효하지 않은 토큰 형식입니다")
+	}
 
 	gameDir, err := installDir()
 	if err != nil {