chore: import upstream snapshot with attribution

scripts/copy-built-package/ui.ts

@@ -0,0 +1,44 @@
+export function termSize(): { cols: number; rows: number } {
+  return {
+    cols: process.stdout.columns || 80,
+    rows: process.stdout.rows || 24,
+  };
+}
+
+export function truncateEnd(str: string, maxLen: number): string {
+  if (str.length <= maxLen) return str;
+  return str.slice(0, maxLen - 1) + '…';
+}
+
+export const centerStringInWidth = (str: string, width: number): string => {
+  const padding = Math.max(0, width - str.length);
+  const padStart = Math.floor(padding / 2);
+  const padEnd = padding - padStart;
+  return ' '.repeat(padStart) + str + ' '.repeat(padEnd);
+};
+
+export function asciiBlock(
+  w: number,
+  px: number,
+  py: number,
+  text: string
+): string[] {
+  const lines = text.split('\n');
+  const contentWidth = w - px * 2 - 2;
+  const paddedLines = lines.map((line) => {
+    const truncatedLine =
+      line.length > contentWidth
+        ? line.slice(0, contentWidth - 3) + '...'
+        : line;
+    return centerStringInWidth(truncatedLine, w - 2);
+  });
+  const emptyLine = ' '.repeat(w - 2);
+  const blockLines = [
+    '┌' + '─'.repeat(w - 2) + '┐',
+    ...Array(py).fill('│' + emptyLine + '│'),
+    ...paddedLines.map((line) => '│' + line + '│'),
+    ...Array(py).fill('│' + emptyLine + '│'),
+    '└' + '─'.repeat(w - 2) + '┘',
+  ];
+  return blockLines;
+}