refactor(cli): improve terminal clearing in interactive menu

index.ts

@@ -283,9 +283,13 @@ async function showMenu(): Promise<void> {
   const actions = MENU_ACTIONS;
   let cursor = 0;
 
-  console.log(`\n  ${BOLD}gai${RESET}\n`);
+  const headerLines = 4;
+
+  process.stdout.write(`\n  ${BOLD}gai${RESET}\n`);
   process.stdout.write(`  ${DIM}↑/↓ navigate, space/enter select${RESET}\n\n`);
 
+  const totalLines = headerLines + actions.length;
+
   function render() {
     for (let i = 0; i < actions.length; i++) {
       process.stdout.write("\x1b[2K\r");
@@ -296,11 +300,15 @@ async function showMenu(): Promise<void> {
       const desc = i === cursor ? a.description : `${DIM}${a.description}${RESET}`;
       process.stdout.write(`${pointer} ${dot} ${name}${" ".repeat(Math.max(1, 14 - a.label.length))}${desc}\n`);
     }
-    moveUp(actions.length);
+    process.stdout.write(`\x1b[${actions.length}A`);
   }
 
-  function moveUp(n: number) {
-    process.stdout.write(`\x1b[${n}A`);
+  function clearMenu() {
+    process.stdout.write(`\x1b[${totalLines}A`);
+    for (let i = 0; i < totalLines; i++) {
+      process.stdout.write("\x1b[2K\x1b[1B");
+    }
+    process.stdout.write(`\x1b[${totalLines}A`);
   }
 
   if (!process.stdin.isTTY) {
@@ -339,8 +347,7 @@ async function showMenu(): Promise<void> {
         process.stdin.setRawMode(savedRaw === true);
         process.stdin.pause();
         process.stdin.removeAllListeners("data");
-        for (let i = 0; i < actions.length; i++) process.stdout.write("\x1b[2K\n");
-        moveUp(actions.length);
+        clearMenu();
         process.stdout.write("\x1b[?25h");
         resolve();
         return;
@@ -372,8 +379,7 @@ async function showMenu(): Promise<void> {
         process.stdin.pause();
         process.stdin.removeAllListeners("data");
 
-        for (let i = 0; i < actions.length; i++) process.stdout.write("\x1b[2K\n");
-        moveUp(actions.length);
+        clearMenu();
         process.stdout.write("\x1b[?25h");
 
         if (selected.key === "commit") {