chore(vendor): import pi 1.3.0

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: 71023aec1546d6d677a65669c5665c0927ce0dd0

third_party/pi/packages/coding-agent/src/utils/shell.ts

@@ -153,40 +153,11 @@ export function getShellEnv(): NodeJS.ProcessEnv {
  * Sanitize binary output for display/storage.
  * Removes characters that crash string-width or cause display issues:
  * - Control characters (except tab, newline, carriage return)
- * - Lone surrogates
- * - Unicode Format characters (crash string-width due to a bug)
- * - Characters with undefined code points
+ * - Unicode interlinear annotation characters U+FFF9..U+FFFB (crash string-width due to a bug)
  */
 export function sanitizeBinaryOutput(str: string): string {
-	// Use Array.from to properly iterate over code points (not code units)
-	// This handles surrogate pairs correctly and catches edge cases where
-	// codePointAt() might return undefined
-	return Array.from(str)
-		.filter((char) => {
-			// Filter out characters that cause string-width to crash
-			// This includes:
-			// - Unicode format characters
-			// - Lone surrogates (already filtered by Array.from)
-			// - Control chars except \t \n \r
-			// - Characters with undefined code points
-
-			const code = char.codePointAt(0);
-
-			// Skip if code point is undefined (edge case with invalid strings)
-			if (code === undefined) return false;
-
-			// Allow tab, newline, carriage return
-			if (code === 0x09 || code === 0x0a || code === 0x0d) return true;
-
-			// Filter out control characters (0x00-0x1F, except 0x09, 0x0a, 0x0x0d)
-			if (code <= 0x1f) return false;
-
-			// Filter out Unicode format characters
-			if (code >= 0xfff9 && code <= 0xfffb) return false;
-
-			return true;
-		})
-		.join("");
+	// All removed characters are single UTF-16 code units, so surrogate pairs are never split.
+	return str.replace(/[\x00-\x08\x0B\x0C\x0E-\x1F\uFFF9-\uFFFB]/g, "");
 }
 
 /**