Restore the clipboard watcher behavior that drops CLIPBOARD_STATE=sensitive events, which password managers use for copied secrets.
Use the same sensitive foreground clipboard path for emoji insertion instead of a custom history marker, and keep the password-manager MIME hint ignored as a fallback.
Keep the first emoji result selected whenever results exist, including after search filtering, so Enter inserts immediately.
Route emoji insertion through a hidden helper that serves a transient sensitive clipboard entry long enough for Shift+Insert, then stops that clipboard owner.
Mark transient emoji inserts so clipboard history skips only that event while continuing to record normal terminal copies.
David Heinemeier Hansson