feat(slack): add SLACK_LIST_DMS tool and sender name in DMs

[JonasJesus42]

Summary

• Adds SLACK_LIST_DMS tool that lists all bot DM conversations with resolved user names and channel IDs
• Injects the sender's display name into DM messages sent to the LLM ([Mensagem de {name}]) so the agent knows who it's talking to
• Adds user? field to SlackChannel type to support IM channel data from Slack API

Test plan

• Deploy and call SLACK_LIST_DMS — should return DM conversations with user names
• Use a returned channel_id with SLACK_GET_CHANNEL_HISTORY to read DM messages
• Send a DM to the bot and verify the LLM receives the sender name in the message

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Summary by cubic

Add SLACK_LIST_DMS to list the bot’s DM conversations with resolved user names and channel IDs, and inject the sender’s display name into DM messages so the agent knows who is speaking. Also remove deprecated tsconfig path settings to keep CI green on TypeScript 7.0.

• New Features

  • SLACK_LIST_DMS returns DMs with { channel_id, user_id, user_name } and optional limit.
  • DM messages include “[Mensagem de {name}]” when the sender is resolved via getUserInfo.
  • SlackChannel adds user? for IM channel data; tool registered in channelTools.

• Bug Fixes

  • Removed unused baseUrl/paths from tsconfig.json (deprecated in TS 7.0).

^{Written for commit 989175f. Summary will update on new commits.}

[cubic-dev-ai]

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