feat: chart2/3/4 + section 5 (regional breakdown)

- 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

src/index.js

@@ -3,6 +3,9 @@
  */
 
 const { chart1_priceAndMargin } = require('./charts/chart1')
+const { chart2_leaders } = require('./charts/chart2')
+const { chart3_ebitdaGroups } = require('./charts/chart3')
+const { chart4_regionCompare } = require('./charts/chart4')
 const { chart5_scenarioMargins } = require('./charts/chart5')
 const { buildDocument } = require('./generators/document')
 const { PALETTE } = require('./data/palette')
@@ -42,6 +45,34 @@ async function generateReport (config) {
     })
   }
 
+  if (data.leaders && data.leaders.items) {
+    charts.chart2 = await chart2_leaders({
+      items: data.leaders.items,
+      categories: data.leaders.categories || null,
+      highlightName: data.leaders.highlightName || null,
+      unit: data.leaders.unit || 'руб./кг',
+      sort: data.leaders.sort !== false,
+      regionLabel: `${subject.name} · ${data.leaders.title || 'Лидеры по закупочной цене'} · ${data.leaders.unit || 'руб./кг'}`
+    })
+  }
+
+  if (data.ebitda) {
+    charts.chart3 = await chart3_ebitdaGroups({
+      groups: data.ebitda.groups || data.ebitda,
+      unit: (data.ebitda.unit) || 'EBITDA-маржа, %',
+      regionLabel: `${subject.name} · Эффективность по группам хозяйств · %`
+    })
+  }
+
+  if (data.regionComparison) {
+    charts.chart4 = await chart4_regionCompare({
+      left: data.regionComparison.left,
+      right: data.regionComparison.right,
+      unit: data.regionComparison.unit || 'руб./кг',
+      regionLabel: `${subject.name} · Сравнение регионов · ${data.regionComparison.unit || 'руб./кг'}`
+    })
+  }
+
   // 2) Собираем DOCX
   return buildDocument({ subject, period, data, text, meta, charts })
 }
@@ -52,6 +83,9 @@ module.exports = {
   // Экспортируем внутренности для возможности кастомизации
   charts: {
     chart1_priceAndMargin,
+    chart2_leaders,
+    chart3_ebitdaGroups,
+    chart4_regionCompare,
     chart5_scenarioMargins,
   }
 }