Task 593: Cross-Episode Review Lower-Priority Fixes

Status: DONE

Description

Address remaining lower-priority items from Task 592's external review of cross-episode.md:

1. 3D viewer caption: Currently only describes controls, not content — add description of what the viewer shows
2. Speed profile chart description: Should note that brachistochrone peak velocities are omitted from the chart

Source

• Remaining items from Task 592 external review (Task agent, Sonnet)
• Review date: 2026-03-03