Windows 메뉴바 제거, Windows 빌드 환경 적용

- Windows 빌드(npm run build) 실행을 위해서는 VScode를 관리자 권한으로 실행해야 함

src/renderer/style.css

@@ -67,6 +67,40 @@ header h1 {
   font-size: 13px; font-weight: 600; color: var(--muted);
   letter-spacing: .08em; text-transform: uppercase;
 }
+
+/* 커스텀 창 컨트롤 버튼 (Windows) */
+.window-controls {
+  display: none;
+  position: absolute;
+  right: 0;
+  top: 0;
+  height: 44px;
+  -webkit-app-region: no-drag;
+}
+body.platform-win32 .window-controls {
+  display: flex;
+}
+.wc-btn {
+  width: 46px;
+  height: 44px;
+  border: none;
+  background: transparent;
+  color: var(--muted);
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: background 0.1s, color 0.1s;
+}
+.wc-btn:hover {
+  background: rgba(255,255,255,0.1);
+  color: var(--fg);
+}
+.wc-close:hover {
+  background: #c42b1c;
+  color: #fff;
+}
+
 .dir-path {
   font-family: 'JetBrains Mono', monospace;
   font-size: 11px; color: var(--muted); opacity: .7;