Task 225: Apply diagram angle corrections for EP04/EP05

Status: DONE

Description

Now that Task 224 added MDX episode support to update-diagram-angles, run the script to sync EP04 and EP05 planet orbit positions with the computed ephemeris timeline.

Changes

1. EP04 diagram angles: All 5 planet orbits updated to match computed positions at EP04 departure epoch (2241-12-17). Departure/arrival burn markers updated accordingly.
2. EP05 diagram angles: All 5 planet orbits updated across 3 diagrams (direct brachistochrone, composite flyby, direct nozzle-failure). Departure/arrival/flyby burn markers updated.
3. EP05 Oberth burn fix: The "Oberth加速（+3%）" burn at Jupiter wasn't updated by the script (intermediate planet safety), so it was manually corrected to match Jupiter's new orbit angle (3.6104→3.1254).
4. Cross-episode burn script fix: updateCrossEpisodeDiagram() now snaps burn markers to the orbit's static angle instead of computing from the actual departure JD. This is correct because orbits have meanMotion for animation — the animation handles the temporal offset, and the static burn marker should match the orbit's t=0 position.

Files

• reports/data/episodes/ep04.md — orbit angles + burn markers
• reports/data/episodes/ep05.md — orbit angles + burn markers
• ts/src/update-diagram-angles.ts — cross-episode burn snapping fix