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.

src/components/vue/CarteO.vue

@@ -25,12 +25,18 @@ interface CarteNode {
 // V1.2-O : logos plateforme via Brandfetch CDN (visible zoom > 1.5x seulement)
 const BRANDFETCH_CLIENT_ID = '4ae58bd85c8140eab0cee72f40656120'
 const LOGO_ZOOM_THRESHOLD = 1.5
+
+// V1.3-D : dimensions rectangle central (phrase manifeste 3 lignes)
+const CENTRAL_W = 300
+const CENTRAL_H = 64
+const CENTRAL_COLLIDE_RADIUS = 160  // demi-largeur + marge
 const logoUrl = (domain: string) =>
   `https://cdn.brandfetch.io/${domain}/w/64/h/64?c=${BRANDFETCH_CLIENT_ID}`
 
 interface CarteEdge {
   source: string | CarteNode
   target: string | CarteNode
+  central?: boolean  // V1.3-D : link au noeud central (court/fort)
 }
 
 const props = withDefaults(defineProps<{
@@ -118,25 +124,38 @@ function truncate(str: string, max: number): string {
   return str.length > max ? str.slice(0, max - 1) + '…' : str
 }
 
-// Split intelligent du label central sur 2-3 lignes (autour de "+")
-function splitCentralLabel(label: string): string[] {
+// V1.3-D : Wrap intelligent du label central sur 3 lignes (rectangle 300x64).
+// Phrase cible : "Une medecine du corps social pour ecrire un nouveau contrat social"
+// Heuristique : decoupe en mots, repartit sur ~3 lignes de longueur equilibree.
+function splitCentralLabel(label: string, maxLines = 3, maxCharsPerLine = 30): string[] {
   if (!label) return ['']
-  // priorite : split sur " + " si present
+  // Fallback : pivot legacy " + " (V1.2 backward compat)
   if (label.includes(' + ')) {
     const parts = label.split(' + ')
     return [parts[0].trim(), '+', parts.slice(1).join(' + ').trim()]
   }
-  // fallback : split a peu pres au milieu sur un espace
-  if (label.length > 14) {
-    const mid = Math.floor(label.length / 2)
-    const left = label.lastIndexOf(' ', mid)
-    const right = label.indexOf(' ', mid)
-    const cut = (mid - left <= right - mid && left > 0) ? left : right
-    if (cut > 0) {
-      return [label.slice(0, cut).trim(), label.slice(cut).trim()]
+  const words = label.split(/\s+/).filter(Boolean)
+  if (words.length <= 1) return [label]
+
+  // Repartit en lignes en respectant maxCharsPerLine, max maxLines lignes
+  const lines: string[] = []
+  let current = ''
+  for (const w of words) {
+    const next = current ? `${current} ${w}` : w
+    if (next.length > maxCharsPerLine && current && lines.length < maxLines - 1) {
+      lines.push(current)
+      current = w
+    } else {
+      current = next
     }
   }
-  return [label]
+  if (current) lines.push(current)
+  // Si plus de lignes que prevu (mots tres longs), concatene les dernieres
+  while (lines.length > maxLines) {
+    const last = lines.pop()!
+    lines[lines.length - 1] = `${lines[lines.length - 1]} ${last}`
+  }
+  return lines
 }
 
 function buildSimNodes(): SimNode[] {
@@ -232,18 +251,33 @@ function render() {
     .style('cursor', 'pointer')
     .on('click', (_event, d) => emit('node-click', { node: d as CarteNode, x: (d as SimNode).x || 0, y: (d as SimNode).y || 0 }))
     .on('mouseover', function (_event, d) {
-      d3.select(this).select('circle')
+      // V1.3-D : selecteur etendu rect|circle (rect pour central, circle pour autres)
+      d3.select(this).select('rect, circle')
         .transition().duration(120)
         .attr('stroke-width', strokeWidthFor(d) + 1.5)
     })
     .on('mouseout', function (_event, d) {
-      d3.select(this).select('circle')
+      d3.select(this).select('rect, circle')
         .transition().duration(120)
         .attr('stroke-width', strokeWidthFor(d))
     })
 
-  // Cercle
-  nodeGroups.append('circle')
+  // V1.3-D : nœud central = rectangle 300x64 (phrase 3 lignes), autres = cercle
+  const isCentral = (d: SimNode) => d.niveau === 0
+
+  nodeGroups.filter(isCentral)
+    .append('rect')
+    .attr('x', -CENTRAL_W / 2)
+    .attr('y', -CENTRAL_H / 2)
+    .attr('width', CENTRAL_W)
+    .attr('height', CENTRAL_H)
+    .attr('rx', 6)
+    .attr('fill', d => colorFor(d))
+    .attr('stroke', d => strokeFor(d))
+    .attr('stroke-width', d => strokeWidthFor(d))
+
+  nodeGroups.filter(d => !isCentral(d))
+    .append('circle')
     .attr('r', d => getRadius(d))
     .attr('fill', d => colorFor(d))
     .attr('stroke', d => strokeFor(d))
@@ -256,10 +290,10 @@ function render() {
     const inside = labelInsideFor(d)
 
     if (inside && d.niveau === 0) {
-      // Noeud central : label en 2 lignes inscrites au centre
-      const parts = splitCentralLabel(d.label)
-      const lineHeight = isMobile.value ? 10 : 12
-      const fs = isMobile.value ? 9 : 11
+      // V1.3-D : noeud central = rectangle, label 3 lignes 13px line-height 1.35
+      const fs = isMobile.value ? 11 : 13
+      const lineHeight = Math.round(fs * 1.35)
+      const parts = splitCentralLabel(d.label, 3, isMobile.value ? 22 : 30)
       const startY = -((parts.length - 1) * lineHeight) / 2
       parts.forEach((line, i) => {
         g.append('text')
@@ -269,7 +303,7 @@ function render() {
           .attr('y', startY + i * lineHeight)
           .attr('font-size', fs)
           .attr('font-family', 'system-ui, sans-serif')
-          .attr('font-weight', 'bold')
+          .attr('font-weight', '500')
           .attr('fill', '#FFFFFF')
           .attr('pointer-events', 'none')
           .text(line)
@@ -332,21 +366,54 @@ function render() {
   nodeGroups.append('title')
     .text(d => `${d.label}\n[${d.family}]\n${truncate(d.resume || d.intention || '', 200)}`)
 
-  // Simulation force avec charges differenciees par niveau
+  // V1.3-D : Simulation force-directed fit-cadre + animation continue subtile
+  // - link distance/strength differencies : TMIP (central) court/fort, autres essais souples
+  // - collide +12 zero overlap labels
+  // - forceX/Y faibles rappel cadre
+  // - alphaDecay 0.025 (anime sans vertige)
   simulation = d3.forceSimulation<SimNode, SimLink>(simNodes)
     .force('link', d3.forceLink<SimNode, SimLink>(simLinks)
       .id(d => d.id)
-      .distance(80)
-      .strength(0.35))
+      .distance(l => {
+        const link = l as SimLink & { central?: boolean }
+        // Lien central -> TMIP (projet) = court (90), autres centraux (essais) = standard (200)
+        if (link.central) {
+          const tgt = link.target as SimNode
+          const src = link.source as SimNode
+          const other = (tgt.niveau === 0 ? src : tgt) as SimNode
+          if (other.nature === 'projet') return 90
+          return 200
+        }
+        return 180
+      })
+      .strength(l => {
+        const link = l as SimLink & { central?: boolean }
+        if (link.central) {
+          const tgt = link.target as SimNode
+          const src = link.source as SimNode
+          const other = (tgt.niveau === 0 ? src : tgt) as SimNode
+          if (other.nature === 'projet') return 0.6
+          return 0.3
+        }
+        return 0.3
+      }))
     .force('charge', d3.forceManyBody<SimNode>().strength(d => {
-      if (d.niveau === 0) return -800
+      if (d.niveau === 0) return -1200
       if (d.niveau === 1) return -400
-      if (d.niveau === 2) return -150
+      if (d.niveau === 2) return -180
       return -220
     }))
     .force('center', d3.forceCenter(width.value / 2, height.value / 2))
-    .force('collide', d3.forceCollide<SimNode>().radius(d => getRadius(d) + 6))
-    .alphaDecay(0.03)
+    .force('x', d3.forceX<SimNode>(width.value / 2).strength(0.05))
+    .force('y', d3.forceY<SimNode>(height.value / 2).strength(0.05))
+    .force('collide', d3.forceCollide<SimNode>().radius(d => {
+      // V1.3-D : central traite comme zone large (rect 300x64 -> rayon equivalent 160)
+      if (d.niveau === 0) return CENTRAL_COLLIDE_RADIUS
+      return getRadius(d) + 12
+    }))
+    .alphaDecay(0.025)
+    .velocityDecay(0.4)
+    .alphaMin(0.001)
     .on('tick', tick)
 
   // Bind drag once simulation exists.
@@ -409,6 +476,8 @@ onMounted(() => {
     }
     if (simulation) {
       simulation.force('center', d3.forceCenter(width.value / 2, height.value / 2))
+      simulation.force('x', d3.forceX<SimNode>(width.value / 2).strength(0.05))
+      simulation.force('y', d3.forceY<SimNode>(height.value / 2).strength(0.05))
       simulation.alpha(0.3).restart()
     }
   })