pi-convos

Use --home for isolated state, add new tools (rename, update-profile, lock/unlock, explode), switch send_file to stdin protocol, add heartbeat/description/permissions/log-level support

Merge pull request #1 from yewreeka/feat/headless-mode

feat: add headless mode with auto-start, catch-up, and file send

Add image attachment support: download and pass to LLM

Remove debug logging