factored out window styling to app.vue and other style improvments

src/background/window.ts

@@ -55,6 +55,9 @@ export const createWindow = async (options: WindowSettings): Promise<void> => {
       width: options.width,
       height: options.height,
       resizable: options.resizable,
+      frame: false,
+      minWidth: 350,
+      minHeight: 500,
       webPreferences: {
         // Use pluginOptions.nodeIntegration, leave this alone
         // See nklayman.github.io/vue-cli-plugin-electron-builder/guide/security.html#node-integration for more info