Improve mobile UI responsiveness, touch tap-to-translate, and PWA icon

server/index.js

@@ -196,6 +196,7 @@ app.use((req, res, next) => {
   next();
 });
 app.use('/data', express.static(path.join(PUBLIC_DIR, 'data')));
+app.get('/icon.svg', (_req, res) => res.sendFile(path.join(PUBLIC_DIR, 'icon.svg')));
 app.get('/styles.css', (_req, res) => res.sendFile(path.join(PUBLIC_DIR, 'styles.css')));
 app.get('/app.js', (_req, res) => res.sendFile(path.join(PUBLIC_DIR, 'app.js')));
 app.get('/', (_req, res) => res.sendFile(path.join(PUBLIC_DIR, 'index.html')));