titlebar switching

src/main/main.ts

@@ -20,6 +20,7 @@ import {
     Tray,
     Menu,
     nativeImage,
+    nativeTheme,
     BrowserWindowConstructorOptions,
     protocol,
     net,
@@ -414,6 +415,11 @@ const createWindow = async () => {
         // eslint-disable-next-line
         new AppUpdater();
     }
+
+    const theme = store.get('theme') as 'dark' | 'light' | 'system' | undefined;
+    if (theme) {
+        nativeTheme.themeSource = theme;
+    }
 };
 
 app.commandLine.appendSwitch('disable-features', 'HardwareMediaKeyHandling,MediaSessionService');