Task 195: EP05 Navigation Accuracy Analysis + Cross-Episode Timeline Fix

Status: DONE

Goal

1. Quantify EP05's navigation accuracy claim: 20km positional error over 18.2 AU (Uranus→Earth) using autonomous stellar navigation only. Compare with EP03's 99.8% navigation error analysis.
2. Fix cross-episode timeline table to include EP5 row (currently listed in episodes array but only has "—" in all data rows).

Changes Made

EP05 Report (ep05.md)

• Added ep05-exploration-09: "天王星から20km精度の自律航法は、どの程度驚異的な精度か？"

- 4 scenarios: EP05 actual (20km/18.2AU), New Horizons Pluto (184km/DSN), NH autonomous stellar (6.6M km), EP03 crisis (1.23°)

- Angular accuracy: 7.35 nrad (0.00152 arcsec) — DSN DDOR grade, but autonomous

- Cross-episode narrative: EP03 crisis → EP05 precision (290万倍改善)

- References ep05-quote-03 and ep05-quote-24 (previously unreferenced)

EP05 Analysis Code (ep05-analysis.ts)

• Added navigationAccuracyAnalysis() function

- Computes angular accuracy, relative precision, real-world comparisons

- Integrated into analyzeEpisode5() return value

Tests (analysis-reproduction.test.ts)

• Added "EP05 reproduction: navigation accuracy" test suite (7 tests)

- Angular accuracy ≈ 7.35 nrad

- EP03 comparison: ~2.9M times better

- New Horizons Pluto comparison: ~9.2x better

- New Horizons autonomous: >100,000x better

Cross-Episode Report (cross-episode.md)

• Fixed timeline table: Split EP4 row into EP4 (departure) + EP5 (transit+arrival)
• Added "航法精度の進化 — EP03危機からEP05達成へ" section

- Comparison table: EP03 vs EP05 vs real-world navigation

- Narrative connecting EP03 navigation crisis to EP05 achievement

Test Results

• 1608 TS tests pass (7 new)
• Rust tests pass
• TypeScript typecheck clean
• Build succeeds