Help participants follow and understand agent work in a channel. This came from Nate's product feedback: raw, folded tool groups make active runs look idle and are hard to audit, and participants also want to learn from the work, not just watch it.

Three separately actionable pieces, in dependency order:

- [ ] #99: **Visibility.** A live, plain-language account of progress, outcomes, and blockers, with the raw audit trail kept underneath. - [ ] #100: **Educational explanation.** An optional, disableable split pane that explains what was built, why, and how it fits together. Depends on #99. - [ ] #101: **Personalization (design proposal).** Participant-controlled marks of known concepts that tailor explanations, without hiding progress or audit information. Depends on #100.

Related: #54 (live tool progress, a prerequisite for #99), #12, and #23 (completed supporting capability: channel names and rolling summaries; it does not complete #99).

Tracked under #5.