Make the app feel more native & use transparency on windows & macos

package.json

@@ -11,7 +11,6 @@
     "tauri": "tauri"
   },
   "dependencies": {
-    "@fontsource/lexend": "5.2.11",
     "@tailwindcss/vite": "4.3.0",
     "@tauri-apps/api": "2.11.0",
     "@tauri-apps/plugin-clipboard-manager": "2.3.2",