feat: adaptive bitrate support, engine improvements, demo updates, and electron preload

electron/main.js

@@ -27,7 +27,8 @@ app.whenReady().then(async () => {
       autoHideMenuBar: false,
       webPreferences: {
         nodeIntegration: false,
-        contextIsolation: true
+        contextIsolation: true,
+        preload: path.join(__dirname, 'preload.js')
       },
       icon: path.join(__dirname, '..', 'public', 'icon.png') // 应用图标
     })

electron/preload.js

@@ -0,0 +1,3 @@
+const { contextBridge } = require('electron')
+
+contextBridge.exposeInMainWorld('__ELECTRON__', true)