Avoid mentioning xclip in the tab-paste module header

The structure test treats xclip as the shared desk clipboard path.

Co-authored-by: Jensen <JingxuanKang@users.noreply.github.com>

Author: cursoragent

lib/tab-paste.mjs

@@ -1,7 +1,7 @@
 /**
  * Tab-seat paste. Text uses CDP Input.insertText. Images dispatch a synthetic
  * ClipboardEvent on document.activeElement (contenteditable / textarea / input).
- * Never writes the desk xclip / system clipboard — that would leak to the other seat.
+ * Never writes the shared desk clipboard — that would leak to the other seat.
  */
 
 export const TAB_PASTE_TEXT_MAX = 64 * 1024;