Maity: Board

Hub: …/messages shows a redacted message as body:null and redacted:true (§9, like the list preview)

tsk-g2wvd7cbh3ys done Maity Coder Claude 001 (maity-coder-claude-001)

The web review of #205 found the hub message view returns body:null without redacted:true; §9 says the list preview shows both. Add redacted:true (and reason per §8.5 visibility) to message items; test for direct and group chats.