feat(v13-d): Carte O Option B rectangle central + bandeau sommaire + legende + TMIP relie

- YAML carte-o-source : label central -> 'Une medecine du corps social pour
  ecrire un nouveau contrat social' (phrase pleine 3 lignes)
- YAML : projet TMIP gagne lien_central:true (edge explicite centre <-> projet)
- build-carte-o.js : addEdge accepte opts.central=true pour tagger les edges
  rattachees au noeud central (permet tuning force-link cote Vue)
- carte-o.json regenere : 17 nodes, 20 edges (vs 19 V1.2-O), tous les edges
  central->thematiques + central->tmip portent flag central:true
- CarteO.vue : noeud central rendu en RECT 300x64 fill encre (vs cercle r30),
  label blanc multi-tspan 3 lignes 13px font-weight 500 line-height 1.35
- CarteO.vue : splitCentralLabel reecrit pour wrap intelligent (3 lignes
  ~30 chars), preserve compat ' + ' (V1.2)
- CarteO.vue : force tuning V1.3 -> alphaDecay 0.025, velocityDecay 0.4,
  forceCollide +12 (CENTRAL_COLLIDE_RADIUS=160 pour le rect), forceX/Y
  strength 0.05 rappel cadre, link distance/strength differencies
  (central->projet = 90/0.6, central->essai = 200/0.3)
- CarteO.vue : hover handler selector etendu rect|circle
- CarteOWrapper.vue : CarteEdge gagne champ central?:boolean
- ColCentre.astro : tabs Chatbot retires (ChatbotV2 import retire aussi),
  remplaces par header bandeau 'Sommaire editorial d'architecture
  d'ecologie politique' (gauche, monospace 12px) + legende 3 symboles
  (publie ● / a venir ○ / projet 🟠) en droite

Build SSR : 5 pages prerender, 0 warning, 4.35s.

public/data/carte-o.json

@@ -1,10 +1,10 @@
 {
   "version": "1.1",
-  "generatedAt": "2026-05-11T16:47:45.459Z",
+  "generatedAt": "2026-05-11T17:59:41.381Z",
   "nodes": [
     {
       "id": "contrat-social-medecine-corps-social",
-      "label": "Contrat social + Medecine du corps social",
+      "label": "Une medecine du corps social pour ecrire un nouveau contrat social",
       "niveau": 0,
       "nature": "essai",
       "statut": "gestation",
@@ -191,63 +191,83 @@
   "edges": [
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "systemique"
+      "target": "systemique",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "pratiques-collectives"
+      "target": "pratiques-collectives",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "art-narration"
+      "target": "art-narration",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "pouvoir-domination"
+      "target": "pouvoir-domination",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "medias-critique"
+      "target": "medias-critique",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "justice-securite"
+      "target": "justice-securite",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "sante-globale"
+      "target": "sante-globale",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "agriculture"
+      "target": "agriculture",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "post-croissance"
+      "target": "post-croissance",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "anthropocene"
+      "target": "anthropocene",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "education"
+      "target": "education",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "urbanisme"
+      "target": "urbanisme",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "geopolitique"
+      "target": "geopolitique",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "ia-technologie"
+      "target": "ia-technologie",
+      "central": true
     },
     {
       "source": "contrat-social-medecine-corps-social",
-      "target": "spiritualite"
+      "target": "spiritualite",
+      "central": true
+    },
+    {
+      "source": "contrat-social-medecine-corps-social",
+      "target": "tmip",
+      "central": true
     },
     {
       "source": "tmip",