feat: PC3 mindmap Carte O (D3 force-directed) + scrape AEP/Articles + tabs centre HAUT

- scripts/build-carte-o.js : scan recursif AEP/Articles/, parse YAML + legacy header, extract wikilinks, infer 5 famille
- src/components/vue/CarteO.vue : D3 v7 force-directed avec drag, zoom + pan, click handler, tooltips, ResizeObserver
- src/components/vue/CarteOModal.vue : modal recap intention avec Teleport, Esc + backdrop close, transitions
- src/components/vue/CarteOWrapper.vue : fetch /data/carte-o.json, etat selectionne, fallback mobile (msg + miniature SVG)
- src/components/astro/ColCentre.astro : tabs Carte O / Chatbot, panneaux ARIA
- package.json : prebuild + predev hooks, build:carte-o script
- public/data/carte-o.json : 84 nodes / 94 edges sur 21 themes, distribution familles equilibree

Drill-down V1 = zoom + pan seul (V2 recursif backlog).
Pattern adapte de nav-carte/components/codev/CodevGraph.vue (sans coupling Nuxt).
Build Astro 6.3.1 OK, bundle CarteOWrapper 69KB.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

package.json

@@ -6,16 +6,23 @@
     "node": ">=22.12.0"
   },
   "scripts": {
+    "predev": "node scripts/build-carte-o.js",
     "dev": "astro dev",
+    "prebuild": "node scripts/build-carte-o.js",
     "build": "astro build",
     "preview": "astro preview",
-    "astro": "astro"
+    "astro": "astro",
+    "build:carte-o": "node scripts/build-carte-o.js"
   },
   "dependencies": {
     "@astrojs/vue": "^6.0.1",
     "@tailwindcss/vite": "^4.2.4",
+    "@types/d3": "^7.4.3",
     "astro": "^6.3.1",
+    "d3": "^7.9.0",
     "embla-carousel-vue": "^8.6.0",
+    "globby": "^16.2.0",
+    "gray-matter": "^4.0.3",
     "tailwindcss": "^4.2.4",
     "vue": "^3.5.34"
   }