Task 609: Jupiter Capture 3D Scene with IF Counterfactual Routes

Status: DONE

Summary

Add a dedicated Jupiter-centric 3D scene for EP01, showing the canonical perijupiter capture (1.5 RJ) and IF high-altitude capture at Ganymede orbit. This fills a gap where EP02 (Saturn), EP03 (Uranus), and EP05 all have local scenes with IF scenario toggles, but EP01 does not.

Background

EP01's analysis includes:

• ep01-diagram-04: "IF分析: ペリジュピター捕獲 vs 高高度捕獲" (2D only)
• ep01-exploration-05: Perijupiter vs Ganymede orbit altitude capture
• Canonical: 1.5 RJ, ΔV = 2.3 km/s (Oberth effect), V∞ = 12 km/s
• IF: 15.1 RJ (Ganymede orbit), ΔV = 4.13 km/s (no Oberth benefit)

Acceptance Criteria

• prepareJupiterCaptureScene() function in orbital-3d-viewer-data.ts
• Shows Jupiter as central body with Galilean moons (Io, Europa, Ganymede, Callisto)
• Canonical scenario: Mars approach → deep perijupiter capture (1.5 RJ) → Ganymede transfer
• IF scenario: Mars approach → direct high-altitude capture at Ganymede orbit
• Scenario toggle UI (following Saturn/Uranus pattern)
• Unit tests for the new function
• Registered in orbital-3d.html and templates.ts inline viewer
• E2E test verifying the scene renders

Dependencies

• Task 602 (DONE) — IF counterfactual routes pattern
• Task 607 (DONE) — target collision offset fix

Key Files

• ts/src/orbital-3d-viewer-data.ts — new scene function
• ts/src/orbital-3d-viewer-data.test.ts — unit tests
• ts/examples/orbital-3d.html — standalone viewer registration
• ts/src/templates.ts — inline viewer scene list