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/legislation-timeline.html

@@ -0,0 +1,82 @@
+{{ $lang := .Page.Language.Lang }}
+
+<style>
+.ifk-timeline-wrap { margin: 2rem 0; }
+.ifk-timeline-wrap h3 { text-align: center; margin-bottom: 1rem; font-size: 1.25rem; }
+.ifk-mermaid-container {
+  background: #fafbfc; border: 1px solid #e2e8f0; border-radius: 10px;
+  padding: 1.5rem; overflow-x: auto;
+}
+</style>
+
+<div class="ifk-timeline-wrap">
+  <h3>{{ if eq $lang "de" }}Meilensteine der Gesetzgebung{{ else if eq $lang "fr" }}Jalons législatifs{{ else }}Legislation Milestones{{ end }}</h3>
+  <div class="ifk-mermaid-container">
+    <pre class="mermaid">
+timeline
+    {{ if eq $lang "de" -}}
+    title Kinderschutzgesetze — Meilensteine
+    2020 : 🇰🇷 Südkorea Jugendschutzgesetz
+    2021 : 🇩🇪 JuSchG-Novelle (Online)
+         : 🇨🇳 Minderjährigenschutzgesetz
+    2022 : 🇮🇪 Online Safety Act
+    2023 : 🇬🇧 Online Safety Act
+         : 🇮🇳 DPDP Act
+    2024 : 🇦🇺 Social Media Ban (unter 16)
+         : 🇳🇱 DSA + Kinderkodex
+         : 🇸🇪 DSA + Jugendrichtlinien
+         : 🇯🇵 Regulierung Kontaktaufnahme
+    2025 : 🇧🇷 ECA Digital
+         : 🇮🇹 Einwilligungsgesetz (14+)
+         : 🇪🇸 Digitaler Kinderschutz
+         : 🇳🇴 Social-Media-Altersgrenze (15)
+    2026 : 🇫🇷 Social-Media-Verbot (unter 15)
+         : 🇺🇸 KOSA + COPPA-Update
+         : 🇨🇦 Online Harms Act
+    {{- else if eq $lang "fr" -}}
+    title Lois de protection de l'enfance — Jalons
+    2020 : 🇰🇷 Loi protection jeunesse
+    2021 : 🇩🇪 JuSchG en ligne
+         : 🇨🇳 Loi protection mineurs
+    2022 : 🇮🇪 Online Safety Act
+    2023 : 🇬🇧 Online Safety Act
+         : 🇮🇳 DPDP Act
+    2024 : 🇦🇺 Interdiction réseaux sociaux (-16)
+         : 🇳🇱 DSA + Code enfance
+         : 🇸🇪 DSA + Directives jeunesse
+         : 🇯🇵 Régulation sollicitation
+    2025 : 🇧🇷 ECA Digital
+         : 🇮🇹 Consentement (14+)
+         : 🇪🇸 Protection enfance numérique
+         : 🇳🇴 Limite âge réseaux (15)
+    2026 : 🇫🇷 Interdiction réseaux (-15)
+         : 🇺🇸 KOSA + COPPA
+         : 🇨🇦 Online Harms Act
+    {{- else -}}
+    title Child Protection Laws — Milestones
+    2020 : 🇰🇷 South Korea Youth Protection Act
+    2021 : 🇩🇪 Germany JuSchG Online Extension
+         : 🇨🇳 China Minor Protection Law
+    2022 : 🇮🇪 Ireland Online Safety Act
+    2023 : 🇬🇧 UK Online Safety Act
+         : 🇮🇳 India DPDP Act
+    2024 : 🇦🇺 Australia Social Media Ban (under 16)
+         : 🇳🇱 Netherlands DSA + Children's Code
+         : 🇸🇪 Sweden DSA + Youth Guidelines
+         : 🇯🇵 Japan Solicitation Regulation
+    2025 : 🇧🇷 Brazil ECA Digital
+         : 🇮🇹 Italy Consent Law (14+)
+         : 🇪🇸 Spain Digital Child Protection
+         : 🇳🇴 Norway Social Media Age (15)
+    2026 : 🇫🇷 France Social Media Ban (under 15)
+         : 🇺🇸 USA KOSA + COPPA Update
+         : 🇨🇦 Canada Online Harms Act
+    {{- end }}
+    </pre>
+  </div>
+</div>
+
+<script src="https://cdn.jsdelivr.net/npm/mermaid@11/dist/mermaid.min.js"></script>
+<script>
+mermaid.initialize({ startOnLoad: true, theme: 'neutral', timeline: { useMaxWidth: true } });
+</script>