[Init] Initial commit - NetMesh terminal manager

components/terminal/runtime/terminalInputSanitize.ts

@@ -0,0 +1,39 @@
+/**
+ * Strip zero-width / invisible Unicode formatting characters from terminal
+ * input before it reaches the PTY.
+ *
+ * CJK IMEs (notably Microsoft Pinyin / Sogou on Windows) occasionally emit
+ * zero-width characters when switching composition modes. xterm.js sends
+ * these to the PTY via `onData`, and with the `15-graphemes` Unicode
+ * version they render at width 0 — so the command line looks normal but
+ * contains hidden characters that cause the executed command to fail (#3138).
+ *
+ * ZWNJ (U+200C) and ZWJ (U+200D) are intentionally preserved: they carry
+ * meaning in Persian orthography and emoji sequences, and PTYs / remote
+ * programs can process those raw bytes even though they occupy no display
+ * width. Stripping them would corrupt command arguments, filenames, and
+ * passwords that legitimately contain them.
+ */
+
+// U+00AD  SOFT HYPHEN
+// U+200B  ZERO WIDTH SPACE
+// U+200E  LEFT-TO-RIGHT MARK
+// U+200F  RIGHT-TO-LEFT MARK
+// U+2060  WORD JOINER
+// U+2061  FUNCTION APPLICATION
+// U+2062  INVISIBLE TIMES
+// U+2063  INVISIBLE SEPARATOR
+// U+2064  INVISIBLE PLUS
+// U+FEFF  ZERO WIDTH NO-BREAK SPACE / BOM
+//
+// U+200C (ZWNJ) and U+200D (ZWJ) are intentionally excluded.
+const ZERO_WIDTH_INPUT_RE = /[\u00ad\u200b\u200e-\u200f\u2060-\u2064\ufeff]/g;
+
+/**
+ * Remove zero-width / invisible formatting characters from terminal input.
+ * Returns an empty string when the input consisted solely of such characters.
+ */
+export function sanitizeTerminalInput(data: string): string {
+  if (!data) return data;
+  return data.replace(ZERO_WIDTH_INPUT_RE, "");
+}