fix(v024): About dialog EOL + .catch (round 1 review)

Round 1 review minor + final reviewer minor 일괄:
- About dialog detail/clipboard 의 줄바꿈 → os.EOL (Windows Notepad 등에서 줄바꿈 정상)
- showMessageBox().then().catch(() => {}) — dialog reject (main crash 예외) silent
  (tray.ts 가 logger 미import — minimal swallow 패턴 채택)

skip:
- nit: 트레이 메뉴 ordering ("정보" → "종료" 한 그룹) — 현재 패턴도 흔함, 호불호 영역
- nit: process.versions.electron ?? '?' dead branch — 안전 fallback 유지

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/main/tray.ts

@@ -1,6 +1,6 @@
 import electron from 'electron';
 import type { Tray as TrayType, MenuItemConstructorOptions } from 'electron';
-import { platform, release } from 'node:os';
+import { platform, release, EOL } from 'node:os';
 const { app, Tray, Menu, nativeImage, dialog, shell, clipboard } = electron;
 
 function showAboutDialog(): void {
@@ -8,13 +8,14 @@ function showAboutDialog(): void {
   const electronVersion = process.versions.electron ?? '?';
   const nodeVersion = process.versions.node ?? '?';
   const profileDir = app.getPath('userData');
+  // OS EOL 사용 — 클립보드 → Notepad 등에서 줄바꿈 정상.
   const detail = [
     `버전: ${version}`,
     `Electron: ${electronVersion}`,
     `Node: ${nodeVersion}`,
     `OS: ${platform()} ${release()}`,
     `데이터 위치: ${profileDir}`
-  ].join('\n');
+  ].join(EOL);
   void dialog.showMessageBox({
     type: 'info',
     title: 'Inkling 정보',
@@ -25,7 +26,9 @@ function showAboutDialog(): void {
     cancelId: 0
   }).then((r) => {
     if (r.response === 1) void shell.openPath(profileDir);
-    if (r.response === 2) clipboard.writeText(`Inkling ${version}\n${detail}`);
+    if (r.response === 2) clipboard.writeText(`Inkling ${version}${EOL}${detail}`);
+  }).catch(() => {
+    // dialog reject 는 일반 사용에서 발생 X — main process crash 등 예외 케이스 silent.
   });
 }