diff --git a/components/codev/CodevGraph.vue b/components/codev/CodevGraph.vue
index 5d2347c..cc4acc8 100644
--- a/components/codev/CodevGraph.vue
+++ b/components/codev/CodevGraph.vue
@@ -37,9 +37,11 @@ const props = withDefaults(defineProps<{
   fiches: CodevFiche[]
   matches?: CodevMatch[]
   mode?: 'none' | 'solution' | 'alliance' | 'surprise'
+  showLabels?: boolean
 }>(), {
   matches: () => [],
   mode: 'none',
+  showLabels: false,
 })
 
 const emit = defineEmits<{
@@ -146,18 +148,15 @@ function rebuildLinks() {
   currentLinks = buildLinks(currentNodes)
   if (!gLinks || !simulation) return
 
-  const linkSel = gLinks
+  // .join() moderne D3 pour garantir le re-rendu complet
+  gLinks
     .selectAll<SVGLineElement, SimLink>('line')
-    .data(currentLinks, (d: SimLink) => {
-      const s = d.source as SimNode
-      const t = d.target as SimNode
-      return `${s.id}-${t.id}-${d.mode}`
-    })
-
-  linkSel.exit().remove()
-
-  linkSel.enter()
-    .append('line')
+    .data(currentLinks)
+    .join(
+      enter => enter.append('line'),
+      update => update,
+      exit => exit.remove()
+    )
     .attr('stroke', d => linkColor(d.mode))
     .attr('stroke-width', d => 1 + d.score * 3)
     .attr('stroke-opacity', 0.7)
@@ -223,12 +222,12 @@ function render() {
     .attr('stroke', '#fff')
     .attr('stroke-width', 1.5)
 
-  // Pastille besoin (bas-droite, orange)
+  // Pastille besoin (bas-droite, bleu)
   nodeGroups.append('circle')
     .attr('r', 6)
     .attr('cx', r * 0.65)
     .attr('cy', r * 0.65)
-    .attr('fill', '#f97316')
+    .attr('fill', '#3b82f6')
     .attr('stroke', '#fff')
     .attr('stroke-width', 1.5)
 
@@ -236,6 +235,57 @@ function render() {
   nodeGroups.append('title')
     .text(d => `${d.nom}\nOffre : ${d.offre}\nBesoin : ${d.besoin}`)
 
+  // Groupe label bulle (affiche si showLabels)
+  const labelGroups = nodeGroups.append('g')
+    .attr('class', 'label-bubble')
+    .attr('visibility', props.showLabels ? 'visible' : 'hidden')
+
+  // Fond bulle besoin (dessous du noeud)
+  labelGroups.append('rect')
+    .attr('class', 'bubble-besoin-bg')
+    .attr('x', -(r + 50))
+    .attr('y', r + 4)
+    .attr('width', 100)
+    .attr('height', 28)
+    .attr('rx', 6)
+    .attr('fill', '#eff6ff')
+    .attr('stroke', '#3b82f6')
+    .attr('stroke-width', 1)
+
+  // Texte besoin
+  labelGroups.append('text')
+    .attr('class', 'bubble-besoin-txt')
+    .attr('x', -(r) + 50)
+    .attr('y', r + 22)
+    .attr('text-anchor', 'middle')
+    .attr('font-size', 9)
+    .attr('fill', '#1e40af')
+    .attr('pointer-events', 'none')
+    .text(d => truncate(d.besoin, 18))
+
+  // Fond bulle offre (dessus du noeud)
+  labelGroups.append('rect')
+    .attr('class', 'bubble-offre-bg')
+    .attr('x', -(r + 50))
+    .attr('y', -(r + 32))
+    .attr('width', 100)
+    .attr('height', 28)
+    .attr('rx', 6)
+    .attr('fill', '#f0fdf4')
+    .attr('stroke', '#22c55e')
+    .attr('stroke-width', 1)
+
+  // Texte offre
+  labelGroups.append('text')
+    .attr('class', 'bubble-offre-txt')
+    .attr('x', -(r) + 50)
+    .attr('y', -(r + 14))
+    .attr('text-anchor', 'middle')
+    .attr('font-size', 9)
+    .attr('fill', '#166534')
+    .attr('pointer-events', 'none')
+    .text(d => truncate(d.offre, 18))
+
   // Simulation
   simulation = d3.forceSimulation<SimNode, SimLink>(currentNodes)
     .force('link', d3.forceLink<SimNode, SimLink>(currentLinks)
@@ -245,6 +295,8 @@ function render() {
     .force('charge', d3.forceManyBody<SimNode>().strength(-400))
     .force('center', d3.forceCenter(width.value / 2, height.value / 2))
     .force('collide', d3.forceCollide<SimNode>().radius(r + 12))
+    .force('x', d3.forceX(width.value / 2).strength(0.05))
+    .force('y', d3.forceY(height.value / 2).strength(0.05))
     .alphaDecay(0.02)
     .on('tick', tick)
 
@@ -254,16 +306,21 @@ function render() {
 }
 
 function tick() {
+  const r = nodeRadius.value
   if (!gLinks || !gNodes) return
 
   gLinks.selectAll<SVGLineElement, SimLink>('line')
-    .attr('x1', d => (d.source as SimNode).x ?? 0)
-    .attr('y1', d => (d.source as SimNode).y ?? 0)
-    .attr('x2', d => (d.target as SimNode).x ?? 0)
-    .attr('y2', d => (d.target as SimNode).y ?? 0)
+    .attr('x1', d => Math.max(r, Math.min(width.value - r, (d.source as SimNode).x ?? 0)))
+    .attr('y1', d => Math.max(r, Math.min(height.value - r, (d.source as SimNode).y ?? 0)))
+    .attr('x2', d => Math.max(r, Math.min(width.value - r, (d.target as SimNode).x ?? 0)))
+    .attr('y2', d => Math.max(r, Math.min(height.value - r, (d.target as SimNode).y ?? 0)))
 
   gNodes.selectAll<SVGGElement, SimNode>('g.node')
-    .attr('transform', d => `translate(${d.x ?? 0},${d.y ?? 0})`)
+    .attr('transform', d => {
+      const x = Math.max(r, Math.min(width.value - r, d.x ?? 0))
+      const y = Math.max(r, Math.min(height.value - r, d.y ?? 0))
+      return `translate(${x},${y})`
+    })
 }
 
 // ── Watch matches/mode (hook pour M4) ─────────────────────────────────────
@@ -271,13 +328,21 @@ function tick() {
 watch(() => [props.matches, props.mode] as const, () => {
   if (!simulation) return
   rebuildLinks()
-  simulation.force('link', d3.forceLink<SimNode, SimLink>(currentLinks)
-    .id(d => d.id)
+  const newForce = d3.forceLink<SimNode, SimLink>(currentLinks)
+    .id(d => String(d.id))
     .distance(120)
-    .strength(0.3))
-  simulation.alpha(0.5).restart()
+    .strength(0.5)
+  simulation.force('link', newForce)
+  simulation.alpha(0.8).restart()
 }, { deep: true })
 
+// ── Watch showLabels ──────────────────────────────────────────────────────
+
+watch(() => props.showLabels, (val) => {
+  if (!svgEl.value) return
+  d3.select(svgEl.value).selectAll('.label-bubble').attr('visibility', val ? 'visible' : 'hidden')
+})
+
 // ── Watch fiches (re-render si nouvelles fiches) ───────────────────────────
 
 watch(() => props.fiches, () => {
diff --git a/pages/codev/carto.vue b/pages/codev/carto.vue
index 88e11db..bb17163 100644
--- a/pages/codev/carto.vue
+++ b/pages/codev/carto.vue
@@ -11,11 +11,22 @@
       </p>
     </header>
 
+    <div class="show-labels-bar">
+      <button
+        type="button"
+        :class="{ active: showLabels }"
+        @click="showLabels = !showLabels"
+      >
+        {{ showLabels ? 'Masquer besoins/offres' : 'Montrer besoins/offres' }}
+      </button>
+    </div>
+
     <ClientOnly>
       <CodevGraph
         :fiches="fiches"
         :matches="matches"
         :mode="mode"
+        :show-labels="showLabels"
         @select-fiche="onSelectFiche"
       />
       <template #fallback>
@@ -71,6 +82,11 @@
       </button>
     </div>
 
+    <!-- FAB ajouter une fiche -->
+    <NuxtLink to="/codev/fiche" class="fab-add" title="Ajouter ma fiche" aria-label="Ajouter une fiche">
+      +
+    </NuxtLink>
+
   </div>
 </template>
 
@@ -85,6 +101,7 @@ const fiches = computed(() => data.value?.list ?? [])
 
 const matches = ref<CodevMatch[]>([])
 const mode = ref<'none' | 'solution' | 'alliance' | 'surprise'>('none')
+const showLabels = ref(false)
 
 const MODE_LABELS: Record<string, string> = {
   solution: 'Solution',
@@ -256,6 +273,59 @@ function onSelectFiche(id: number) {
   }
 }
 
+/* ── Toggle besoins/offres ── */
+
+.show-labels-bar {
+  display: flex;
+  justify-content: center;
+  margin-bottom: 8px;
+}
+
+.show-labels-bar button {
+  border: 1px solid #d0d4dc;
+  border-radius: 8px;
+  padding: 8px 16px;
+  background: white;
+  font-size: 13px;
+  cursor: pointer;
+  color: #374151;
+  transition: background 0.15s, color 0.15s, border-color 0.15s;
+}
+
+.show-labels-bar button.active {
+  background: #1B4436;
+  color: white;
+  border-color: transparent;
+}
+
+/* ── FAB ajouter ── */
+
+.fab-add {
+  position: fixed;
+  bottom: 80px;
+  right: 16px;
+  width: 48px;
+  height: 48px;
+  border-radius: 50%;
+  background: #1B4436;
+  color: white;
+  font-size: 28px;
+  font-weight: 300;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  text-decoration: none;
+  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
+  z-index: 100;
+  transition: transform 0.15s, opacity 0.15s;
+  line-height: 1;
+}
+
+.fab-add:hover {
+  transform: scale(1.08);
+  opacity: 0.92;
+}
+
 /* ── Mobile ── */
 
 @media (max-width: 600px) {
diff --git a/pages/codev/fiche.vue b/pages/codev/fiche.vue
index 58367dd..64d03be 100644
--- a/pages/codev/fiche.vue
+++ b/pages/codev/fiche.vue
@@ -4,7 +4,7 @@
 
       <!-- En-tête -->
       <div class="fiche-header">
-        <h1>Ma fiche</h1>
+        <h1>{{ isEdit ? 'Modifier ma fiche' : 'Ma fiche' }}</h1>
         <p class="fiche-lead">3 lignes pour te présenter. Le reste se passe entre nous.</p>
       </div>
 
@@ -105,7 +105,7 @@
 
         <!-- Bouton -->
         <button type="submit" class="submit-btn" :disabled="loading">
-          {{ loading ? 'Envoi en cours...' : 'Ajouter ma fiche' }}
+          {{ isEdit ? (loading ? 'Modification...' : 'Enregistrer les modifications') : (loading ? 'Envoi en cours...' : 'Ajouter ma fiche') }}
         </button>
 
       </form>
@@ -115,12 +115,29 @@
 </template>
 
 <script setup lang="ts">
+const route = useRoute()
+const editId = computed(() => route.query.id ? Number(route.query.id) : null)
+const isEdit = computed(() => editId.value !== null)
+
 const form = ref({ nom: '', besoin: '', offre: '', hashtagsRaw: '' })
 const error = ref('')
 const loading = ref(false)
 const activeTip = ref<'besoin' | 'offre' | null>(null)
 
-useHead({ title: 'Ma fiche — Co-développement' })
+useHead({ title: computed(() => isEdit.value ? 'Modifier ma fiche — Co-développement' : 'Ma fiche — Co-développement') })
+
+onMounted(async () => {
+  if (!isEdit.value) return
+  try {
+    const fiche = await $fetch<any>(`/api/codev/fiches/${editId.value}`)
+    form.value.nom = fiche.nom
+    form.value.besoin = fiche.besoin
+    form.value.offre = fiche.offre
+    form.value.hashtagsRaw = fiche.hashtags.join(', ')
+  } catch {
+    error.value = 'Impossible de charger la fiche, elle a peut-etre ete supprimee.'
+  }
+})
 
 function toggleTip(field: 'besoin' | 'offre') {
   activeTip.value = activeTip.value === field ? null : field
@@ -136,15 +153,18 @@ async function submit() {
       .filter(Boolean)
       .slice(0, 3)
 
-    await $fetch('/api/codev/fiches', {
-      method: 'POST',
-      body: {
-        nom: form.value.nom,
-        besoin: form.value.besoin,
-        offre: form.value.offre,
-        hashtags,
-      },
-    })
+    const payload = {
+      nom: form.value.nom,
+      besoin: form.value.besoin,
+      offre: form.value.offre,
+      hashtags,
+    }
+
+    if (isEdit.value) {
+      await $fetch(`/api/codev/fiches/${editId.value}`, { method: 'PATCH', body: payload })
+    } else {
+      await $fetch('/api/codev/fiches', { method: 'POST', body: payload })
+    }
     await navigateTo('/codev/carto')
   } catch (e: any) {
     error.value = e?.data?.message || e?.statusMessage || 'Erreur, reessaie'
diff --git a/server/api/codev/fiches/[id].get.ts b/server/api/codev/fiches/[id].get.ts
new file mode 100644
index 0000000..e7425ea
--- /dev/null
+++ b/server/api/codev/fiches/[id].get.ts
@@ -0,0 +1,34 @@
+import type { CodevFiche } from '~/types/codev'
+
+export default defineEventHandler(async (event): Promise<CodevFiche> => {
+  const config = useRuntimeConfig()
+  const tableId = config.codevTableId
+  const baseId = config.codevBaseId || 'pipilvsi7dibo80'
+  const id = getRouterParam(event, 'id')
+
+  if (!tableId || !id) {
+    throw createError({ statusCode: 400, message: 'Parametre manquant' })
+  }
+
+  const url = `${config.nocodbUrl}/api/v1/db/data/noco/${baseId}/${tableId}/${id}`
+
+  const r: any = await $fetch(url, {
+    headers: { 'xc-token': config.nocodbToken },
+  }).catch(() => null)
+
+  if (!r) {
+    throw createError({ statusCode: 404, message: 'Fiche introuvable' })
+  }
+
+  return {
+    id: r.Id ?? r.id,
+    nom: r.nom || '',
+    besoin: r.besoin || '',
+    offre: r.offre || '',
+    hashtags: (r.hashtags || '')
+      .split(',')
+      .map((h: string) => h.trim().toLowerCase().replace(/^#/, ''))
+      .filter(Boolean),
+    created_at: r.created_at || r.CreatedAt || '',
+  }
+})
diff --git a/server/api/codev/fiches/[id].patch.ts b/server/api/codev/fiches/[id].patch.ts
new file mode 100644
index 0000000..80409fe
--- /dev/null
+++ b/server/api/codev/fiches/[id].patch.ts
@@ -0,0 +1,59 @@
+import { z } from 'zod'
+
+const PatchSchema = z.object({
+  nom: z.string().min(2).max(50).trim(),
+  besoin: z.string().min(5).max(300).trim(),
+  offre: z.string().min(5).max(300).trim(),
+  hashtags: z.array(z.string().max(30)).max(3).default([]),
+})
+
+export default defineEventHandler(async (event) => {
+  const config = useRuntimeConfig()
+  const tableId = config.codevTableId
+  const baseId = config.codevBaseId || 'pipilvsi7dibo80'
+  const id = getRouterParam(event, 'id')
+  const body = await readBody(event)
+
+  if (!tableId || !id) {
+    throw createError({ statusCode: 400, message: 'Parametre manquant' })
+  }
+
+  const parsed = PatchSchema.safeParse(body)
+  if (!parsed.success) {
+    throw createError({
+      statusCode: 422,
+      statusMessage: 'Validation echouee',
+      data: parsed.error.flatten().fieldErrors,
+    })
+  }
+
+  const payload = {
+    nom: parsed.data.nom,
+    besoin: parsed.data.besoin,
+    offre: parsed.data.offre,
+    hashtags: parsed.data.hashtags
+      .map((h) => h.trim().toLowerCase().replace(/^#/, ''))
+      .filter(Boolean)
+      .slice(0, 3)
+      .join(','),
+  }
+
+  // NocoDB v1 PATCH par Id
+  const url = `${config.nocodbUrl}/api/v1/db/data/noco/${baseId}/${tableId}/${id}`
+
+  try {
+    await $fetch(url, {
+      method: 'PATCH',
+      headers: {
+        'xc-token': config.nocodbToken,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify(payload),
+    })
+  } catch (e: any) {
+    console.error('[codev/fiches.patch] NocoDB patch error:', e?.message ?? e)
+    throw createError({ statusCode: 502, statusMessage: 'Erreur serveur' })
+  }
+
+  return { status: 200, ok: true }
+})