- Add support for bot tokens as an alternative authentication method
- Conditionally register search tool only for non-bot tokens (bots cannot use search.messages API)
- Update isOAuth definition to include both xoxp and xoxb tokens for cleaner implementation
- Add bot token configuration to manifest-dxt.json for DXT extension
- Document bot token limitations in README and authentication setup guide
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Co-Authored-By: Claude <noreply@anthropic.com>