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- chart2_leaders: horizontal ranked bars with highlight & category coloring - chart3_ebitdaGroups: vertical bars colored by sign (green ≥0, orange <0) - chart4_regionCompare: side-by-side bar panels with shared y-scale - document.js: new section 5 'Региональный разрез и эффективность' between sections 4 and 6, renders chart2/3/4 with figure captions - index.js: render hooks for data.leaders, data.ebitda, data.regionComparison - examples/russia.js: demo data for all three new charts