Task 591: Localize 3D Viewer Labels to Japanese

Status: DONE

Problem

The 3D orbital viewer has mixed-language labels:

• Planet labels: Japanese (火星, 木星, etc.) ✓
• Orbit labels: Japanese (火星軌道, 木星軌道, etc.) ✓
• Transfer route labels: English (Mars→Jupiter, Jupiter→Saturn, etc.) ✗
• Full-route planet labels: English (Mars, Jupiter, etc.) ✗

Per CLAUDE.md: "All reports published to GitHub Pages must be written in Japanese"

Root Cause

1. ts/src/orbital-3d-analysis.ts LEGS array has English label values
2. ts/src/orbital-3d-viewer-data.ts prepareFullRouteScene generates English planet labels at line 439

Fix

1. Change LEGS labels in orbital-3d-analysis.ts to Japanese
2. Fix prepareFullRouteScene planet labels to use PLANET_LABELS
3. Regenerate 3d_orbital_analysis.json
4. Update tests

Files

• ts/src/orbital-3d-analysis.ts — source of leg labels
• ts/src/orbital-3d-viewer-data.ts — planet label generation
• reports/data/calculations/3d_orbital_analysis.json — generated output
• ts/src/orbital-3d-viewer-data.test.ts — tests
• ts/src/orbital-3d-analysis.test.ts — tests