Pin xattr and pgrep to absolute /usr/bin paths so quarantine clearing
and process detection cannot be hijacked through a caller-controlled
PATH. Gate the launch prompt on stdin being a TTY instead of stdout, so
piping install output through tee no longer silently skips the
handoff. Detect an already-running CCS Bar via pgrep before prompting:
a running instance gets a quit-and-reopen hint instead of a redundant
launch prompt, while --launch still proceeds explicitly.
Tam Nhu Tran
dfc8b7d1dc