优化第一阶段

lib/utils/terminal.js

@@ -0,0 +1,21 @@
+export function clearScreen() {
+  process.stdout.write("\x1Bc");
+}
+
+export function strWidth(str = "") {
+  let width = 0;
+  for (const char of String(str)) {
+    width += char.charCodeAt(0) > 127 ? 2 : 1;
+  }
+  return width;
+}
+
+export function padEnd(str, width) {
+  const value = String(str);
+  return value + " ".repeat(Math.max(0, width - strWidth(value)));
+}
+
+export function centerPad(text, totalWidth) {
+  const pad = Math.max(0, Math.floor((totalWidth - strWidth(text)) / 2));
+  return " ".repeat(pad);
+}