Task 75: 解説の図・グラフ追加

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Task 075: 解説の図・グラフ追加

Status: DONE

Motivation

Human directive: 「解説としての分かりやすさのために、もっと図やグラフがほしい」

Implementation

New report types

BarChart and BarChartItem interfaces in report-types.ts
barChart optional field on SummarySection
comparisonTable (custom headers) optional field on SummarySection

Renderer

renderBarChartFromData(): Delegates to existing renderBarChart() SVG renderer
renderCustomComparisonTable(): Non-episode-keyed comparison tables
Both wired into renderSummaryPage() section renderer
CSS: .bar-chart-container, .chart-caption

Charts added to cross-episode.json

Transit duration chart (航路の連続性): Log-scale bar chart showing EP01-05 transit times (72h → 455d → 143h → 507h)
ΔV comparison chart (Brachistochrone ΔVスケーリング): EP01/03/04/05 ΔV values with distance/time annotations
Margin cascade chart (マージン連鎖分析): EP02-05 margin percentages showing contraction (2.9% → 1.23% → 43% → 0.78%)

Charts added to infrastructure.json

Custom comparison tables for ships and governance bodies (via comparisonTable field)