Added

• --error-format json (global, or PCLI2_ERROR_FORMAT=json) - Everything on stderr becomes one JSON object per line: errors with their hint and, for API errors, the HTTP status; warnings and log lines; the --stats summary. The final error object carries the process exit code and its class (usage, not_found, auth, api, ...), so a script reads one line instead of parsing prose. Usage errors clap reports before the command runs are JSON too.
• --no-input (global, or PCLI2_NO_INPUT=1) - Never prompt. A confirmation that would otherwise be asked fails with exit 64 and names --yes; tenant use and env use without --name fail instead of opening a menu; auth login falls back to its missing-argument error. The same now happens without the flag whenever stdin is not a terminal.

Fixed

• cache clear without a terminal exited 0 as "cancelled" - It read end-of-file as "no" and reported success to the calling script. It now refuses with exit 64 and asks for --yes. folder delete, asset delete and the environment commands already refused; all five prompts now go through one function and give the same message.