- Migrated OAuth provider authentication from standalone `pi-ai` CLI to in-process `AuthStorage.login()` flow in coding-agent.
- Made provider argument optional for `login` and `logout` commands with interactive provider picker when omitted.
- Added `list` command to enumerate registered OAuth providers with optional `--json` output format.
- Removed `pi-ai` CLI binary and `bin` entry from @oh-my-pi/ai package; library API remains unchanged.
- Updated documentation and examples to reflect new `omp auth-broker` command interface and in-process OAuth flow.