fix: exclude divider height from title bar overlay (#2054)

src/main/window.ts

@@ -175,7 +175,7 @@ async function createWindowInternal(): Promise<void> {
     titleBarOverlay: useWindowFrame
       ? false
       : {
-          height: 49
+          height: 47
         },
     autoHideMenuBar: true,
     // Win 显式指定 icon，避免异常/恢复路径下任务栏与窗口图标依赖默认 exe

src/renderer/src/App.tsx

@@ -102,7 +102,7 @@ const App: React.FC = () => {
 
   const setTitlebar = useCallback((): void => {
     if (!useWindowFrame && platform !== 'darwin') {
-      const options = { height: 48 } as TitleBarOverlayOptions
+      const options = { height: 47 } as TitleBarOverlayOptions
       try {
         options.color = window.getComputedStyle(document.documentElement).backgroundColor
         options.symbolColor = window.getComputedStyle(document.documentElement).color