feat(IFK-9): interactive world map, charts, stats banner, timeline

- Add centralized data/countries.json with all 17 countries (EN/DE/FR)
- Add Leaflet choropleth world map with TopoJSON boundaries
- Add stats banner shortcode (enforced/passed/progress/guidelines counts)
- Add Chart.js charts (status donut, age limits bar, legislation timeline)
- Add Mermaid timeline of legislation milestones 2020-2026
- Refactor child-safety-map table to use data file (DRY)
- Update all 3 language articles (EN/DE/FR)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

layouts/shortcodes/stats-banner.html

@@ -0,0 +1,49 @@
+{{ $lang := .Page.Language.Lang }}
+{{ $countries := hugo.Data.countries }}
+
+{{ $enforced := 0 }}{{ $passed := 0 }}{{ $progress := 0 }}{{ $guidelines := 0 }}
+{{ range $countries }}
+  {{ if eq .status "enforced" }}{{ $enforced = add $enforced 1 }}
+  {{ else if eq .status "passed" }}{{ $passed = add $passed 1 }}
+  {{ else if eq .status "progress" }}{{ $progress = add $progress 1 }}
+  {{ else if eq .status "guidelines" }}{{ $guidelines = add $guidelines 1 }}
+  {{ end }}
+{{ end }}
+
+<style>
+.ifk-stats {
+  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem;
+  margin: 2rem 0; text-align: center;
+}
+.ifk-stat {
+  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
+  border-radius: 10px; padding: 1.25rem 0.75rem;
+  border: 1px solid #e2e8f0; transition: transform 0.15s;
+}
+.ifk-stat:hover { transform: translateY(-2px); }
+.ifk-stat-num { font-size: 2rem; font-weight: 800; line-height: 1.1; }
+.ifk-stat-label { font-size: 0.75rem; color: #64748b; margin-top: 0.25rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }
+@media (max-width: 480px) {
+  .ifk-stats { grid-template-columns: repeat(2, 1fr); }
+  .ifk-stat-num { font-size: 1.5rem; }
+}
+</style>
+
+<div class="ifk-stats">
+  <div class="ifk-stat">
+    <div class="ifk-stat-num" style="color:#1e40af">{{ $enforced }}</div>
+    <div class="ifk-stat-label">{{ if eq $lang "de" }}In Kraft{{ else if eq $lang "fr" }}En vigueur{{ else }}Enforced{{ end }}</div>
+  </div>
+  <div class="ifk-stat">
+    <div class="ifk-stat-num" style="color:#3b82f6">{{ $passed }}</div>
+    <div class="ifk-stat-label">{{ if eq $lang "de" }}Verabschiedet{{ else if eq $lang "fr" }}Adoptées{{ else }}Passed{{ end }}</div>
+  </div>
+  <div class="ifk-stat">
+    <div class="ifk-stat-num" style="color:#6366f1">{{ $progress }}</div>
+    <div class="ifk-stat-label">{{ if eq $lang "de" }}In Bearbeitung{{ else if eq $lang "fr" }}En cours{{ else }}In Progress{{ end }}</div>
+  </div>
+  <div class="ifk-stat">
+    <div class="ifk-stat-num" style="color:#8b5cf6">{{ $guidelines }}</div>
+    <div class="ifk-stat-label">{{ if eq $lang "de" }}Richtlinien{{ else if eq $lang "fr" }}Directives{{ else }}Guidelines{{ end }}</div>
+  </div>
+</div>