login: validate sessions via restoreAgent, rename --reset to --force
Instead of checking session file existence, login now calls restoreAgent()
to validate the token against the auth server. Invalid/expired sessions
fall through to the OAuth flow automatically. The --reset flag is renamed
to --force for consistency.
Changed files:
- src/cmd/login.js
- test/login.test.js
- README.md
- skills/vit/COMMANDS.md
- skills/vit/SKILL.md