diff --git a/frontend/i18n/locales/fr.json b/frontend/i18n/locales/fr.json
index 4fa1c99..c09f4e9 100644
--- a/frontend/i18n/locales/fr.json
+++ b/frontend/i18n/locales/fr.json
@@ -10,7 +10,11 @@
         "confirm": "Confirmer",
         "yes": "Oui",
         "no": "Non",
-        "actions": "Actions"
+        "actions": "Actions",
+        "comingSoon": {
+            "title": "En cours de dev",
+            "subtitle": "Cette fonctionnalité arrive bientôt."
+        }
     },
     "sidebar": {
         "administration": {
@@ -95,8 +99,6 @@
                 "back": "Retour au répertoire",
                 "loading": "Chargement du client…",
                 "notFound": "Client introuvable.",
-                "emptyContacts": "Aucun contact enregistré.",
-                "emptyAddresses": "Aucune adresse enregistrée.",
                 "confirmArchive": {
                     "title": "Archiver le client",
                     "message": "Ce client n'apparaîtra plus dans le répertoire actif. Confirmer l'archivage ?"
@@ -111,8 +113,6 @@
                 "back": "Retour au répertoire",
                 "loading": "Chargement du client…",
                 "notFound": "Client introuvable.",
-                "emptyContacts": "Aucun contact enregistré.",
-                "emptyAddresses": "Aucune adresse enregistrée.",
                 "save": "Valider"
             },
             "validation": {
diff --git a/frontend/modules/commercial/components/TabPlaceholderBlank.vue b/frontend/modules/commercial/components/TabPlaceholderBlank.vue
deleted file mode 100644
index 5375cb6..0000000
--- a/frontend/modules/commercial/components/TabPlaceholderBlank.vue
+++ /dev/null
@@ -1,14 +0,0 @@
-<template>
-    <!--
-        Placeholder des onglets non encore implementes (Transport, Statistiques,
-        Rapports, Echanges). Frame vide blanche : aucun champ, aucun bouton,
-        aucun message « En cours » (decision Tristan 28/05). L'orchestrateur passe
-        automatiquement a l'onglet suivant — ce composant n'est qu'une coquille
-        visuelle reutilisee par 1.11/1.12.
-    -->
-    <div class="min-h-[240px] rounded-md bg-white" />
-</template>
-
-<script setup lang="ts">
-// Composant purement presentationnel : aucune prop, aucun event.
-</script>
diff --git a/frontend/modules/commercial/pages/clients/[id]/edit.vue b/frontend/modules/commercial/pages/clients/[id]/edit.vue
index e1f64e5..d1614ec 100644
--- a/frontend/modules/commercial/pages/clients/[id]/edit.vue
+++ b/frontend/modules/commercial/pages/clients/[id]/edit.vue
@@ -179,9 +179,6 @@
                             @update:model-value="(v) => contacts[index] = v"
                             @remove="askRemoveContact(index)"
                         />
-                        <p v-if="contacts.length === 0" class="text-center text-black/60">
-                            {{ t('commercial.clients.edit.emptyContacts') }}
-                        </p>
                         <div v-if="!businessReadonly" class="flex justify-center gap-6">
                             <MalioButton
                                 variant="secondary"
@@ -219,9 +216,6 @@
                             @remove="askRemoveAddress(index)"
                             @degraded="onAddressDegraded"
                         />
-                        <p v-if="addresses.length === 0" class="text-center text-black/60">
-                            {{ t('commercial.clients.edit.emptyAddresses') }}
-                        </p>
                         <div v-if="!businessReadonly" class="flex justify-center gap-6">
                             <MalioButton
                                 variant="secondary"
@@ -245,7 +239,7 @@
                 <template v-if="canAccountingView" #accounting>
                     <div class="mt-12 flex flex-col gap-6">
                         <div class="bg-white py-4 pl-[28px] pr-[60px] shadow-[0_4px_4px_0_rgba(0,0,0,0.25)]">
-                            <div class="grid grid-cols-3 gap-x-[80px] gap-y-5">
+                            <div class="grid grid-cols-4 gap-x-[44px] gap-y-4">
                                 <MalioInputText
                                     v-model="accounting.siren"
                                     :label="t('commercial.clients.form.accounting.siren')"
@@ -312,7 +306,7 @@
                                 v-bind="{ ariaLabel: t('commercial.clients.form.accounting.removeRib') }"
                                 @click="askRemoveRib(index)"
                             />
-                            <div class="grid grid-cols-3 gap-x-[80px] gap-y-5">
+                            <div class="grid grid-cols-4 gap-x-[44px] gap-y-4">
                                 <MalioInputText
                                     v-model="rib.label"
                                     :label="t('commercial.clients.form.accounting.ribLabel')"
@@ -350,10 +344,10 @@
                 </template>
 
                 <!-- Onglets non encore implementes : frame vide (navigation libre). -->
-                <template #transport><TabPlaceholderBlank /></template>
-                <template #statistics><TabPlaceholderBlank /></template>
-                <template #reports><TabPlaceholderBlank /></template>
-                <template #exchanges><TabPlaceholderBlank /></template>
+                <template #transport><ComingSoonPlaceholder /></template>
+                <template #statistics><ComingSoonPlaceholder /></template>
+                <template #reports><ComingSoonPlaceholder /></template>
+                <template #exchanges><ComingSoonPlaceholder /></template>
             </MalioTabList>
         </template>
 
@@ -495,6 +489,11 @@ function hydrate(detail: ClientDetail): void {
     contacts.value = (detail.contacts ?? []).map(mapContactToDraft)
     addresses.value = (detail.addresses ?? []).map(mapAddressToDraft)
     ribs.value = (detail.ribs ?? []).map(mapRibToDraft)
+    // Chaque bloc reste visible meme vide : si une collection est vide, on amorce
+    // un bloc vierge (non persiste tant qu'incomplet — cf. submit*/canValidate*).
+    if (contacts.value.length === 0) contacts.value.push(emptyContact())
+    if (addresses.value.length === 0) addresses.value.push(emptyAddress())
+    if (ribs.value.length === 0) ribs.value.push(emptyRib())
     // Charge les listes distributeur / courtier si une relation est deja posee.
     if (main.relationType === 'distributeur') referentials.loadDistributors().catch(() => {})
     if (main.relationType === 'courtier') referentials.loadBrokers().catch(() => {})
@@ -694,6 +693,8 @@ function askRemoveContact(index: number): void {
         const removed = contacts.value[index]
         if (removed?.id != null) removedContactIds.value.push(removed.id)
         contacts.value.splice(index, 1)
+        // Garde au moins un bloc visible (cf. amorce a l'hydratation).
+        if (contacts.value.length === 0) contacts.value.push(emptyContact())
     })
 }
 
@@ -755,6 +756,8 @@ function askRemoveAddress(index: number): void {
         const removed = addresses.value[index]
         if (removed?.id != null) removedAddressIds.value.push(removed.id)
         addresses.value.splice(index, 1)
+        // Garde au moins un bloc visible (cf. amorce a l'hydratation).
+        if (addresses.value.length === 0) addresses.value.push(emptyAddress())
     })
 }
 
@@ -833,6 +836,8 @@ function askRemoveRib(index: number): void {
         const removed = ribs.value[index]
         if (removed?.id != null) removedRibIds.value.push(removed.id)
         ribs.value.splice(index, 1)
+        // Garde au moins un bloc RIB visible (cf. amorce a l'hydratation).
+        if (ribs.value.length === 0) ribs.value.push(emptyRib())
     })
 }
 
diff --git a/frontend/modules/commercial/pages/clients/[id]/index.vue b/frontend/modules/commercial/pages/clients/[id]/index.vue
index 52ea3cd..a16e73c 100644
--- a/frontend/modules/commercial/pages/clients/[id]/index.vue
+++ b/frontend/modules/commercial/pages/clients/[id]/index.vue
@@ -159,9 +159,6 @@
                             :title="t('commercial.clients.form.contact.title', { n: index + 1 })"
                             readonly
                         />
-                        <p v-if="contacts.length === 0" class="text-center text-black/60">
-                            {{ t('commercial.clients.consultation.emptyContacts') }}
-                        </p>
                     </div>
                 </template>
 
@@ -179,9 +176,6 @@
                             :country-options="countryOptions"
                             readonly
                         />
-                        <p v-if="addressViews.length === 0" class="text-center text-black/60">
-                            {{ t('commercial.clients.consultation.emptyAddresses') }}
-                        </p>
                     </div>
                 </template>
 
@@ -189,7 +183,7 @@
                 <template v-if="canAccountingView" #accounting>
                     <div class="mt-12 flex flex-col gap-6">
                         <div class="bg-white py-4 pl-[28px] pr-[60px] shadow-[0_4px_4px_0_rgba(0,0,0,0.25)]">
-                            <div class="grid grid-cols-3 gap-x-[80px] gap-y-5">
+                            <div class="grid grid-cols-4 gap-x-[44px] gap-y-4">
                                 <MalioInputText
                                     :model-value="accounting.siren"
                                     :label="t('commercial.clients.form.accounting.siren')"
@@ -244,7 +238,7 @@
                             :key="rib.id ?? index"
                             class="bg-white py-4 pl-[28px] pr-[60px] shadow-[0_4px_4px_0_rgba(0,0,0,0.25)]"
                         >
-                            <div class="grid grid-cols-3 gap-x-[80px] gap-y-5">
+                            <div class="grid grid-cols-4 gap-x-[44px] gap-y-4">
                                 <MalioInputText
                                     :model-value="rib.label"
                                     :label="t('commercial.clients.form.accounting.ribLabel')"
@@ -266,10 +260,10 @@
                 </template>
 
                 <!-- Onglets non encore implementes : frame vide (navigation libre). -->
-                <template #transport><TabPlaceholderBlank /></template>
-                <template #statistics><TabPlaceholderBlank /></template>
-                <template #reports><TabPlaceholderBlank /></template>
-                <template #exchanges><TabPlaceholderBlank /></template>
+                <template #transport><ComingSoonPlaceholder /></template>
+                <template #statistics><ComingSoonPlaceholder /></template>
+                <template #reports><ComingSoonPlaceholder /></template>
+                <template #exchanges><ComingSoonPlaceholder /></template>
             </MalioTabList>
         </template>
 
@@ -320,6 +314,7 @@ import {
     type SelectOption,
 } from '~/modules/commercial/utils/clientConsultation'
 import { formatPhoneFR } from '~/shared/utils/phone'
+import { emptyAddress, emptyContact, emptyRib } from '~/modules/commercial/types/clientForm'
 
 // Masques d'affichage (purement visuels, la donnee reste celle du serveur).
 const PHONE_MASK = '## ## ## ## ##'
@@ -372,10 +367,21 @@ const information = computed(() => ({
     directorName: client.value?.directorName ?? null,
 }))
 
-const contacts = computed(() => (client.value?.contacts ?? []).map(mapContactToDraft))
+// Chaque bloc reste visible meme vide en consultation : si la collection est
+// vide, on affiche un bloc vierge en lecture seule (pas de message « Aucun … »).
+const contacts = computed(() => {
+    const list = (client.value?.contacts ?? []).map(mapContactToDraft)
+    return list.length ? list : [emptyContact()]
+})
 // Vue par adresse : brouillon + options (sites/categories) propres a l'adresse.
-const addressViews = computed(() => (client.value?.addresses ?? []).map(mapAddressView))
-const ribs = computed(() => (client.value?.ribs ?? []).map(mapRibToDraft))
+const addressViews = computed(() => {
+    const views = (client.value?.addresses ?? []).map(mapAddressView)
+    return views.length ? views : [{ draft: emptyAddress(), siteOptions: [], categoryOptions: [] }]
+})
+const ribs = computed(() => {
+    const list = (client.value?.ribs ?? []).map(mapRibToDraft)
+    return list.length ? list : [emptyRib()]
+})
 // Draft comptable (tout null si l'utilisateur n'a pas accounting.view).
 const accounting = computed(() => mapAccountingDraft(client.value ?? ({} as ClientDetail)))
 
diff --git a/frontend/modules/commercial/pages/clients/new.vue b/frontend/modules/commercial/pages/clients/new.vue
index f651225..8502eec 100644
--- a/frontend/modules/commercial/pages/clients/new.vue
+++ b/frontend/modules/commercial/pages/clients/new.vue
@@ -233,7 +233,7 @@
             <template v-if="canAccountingView" #accounting>
                 <div class="mt-12 flex flex-col gap-6">
                     <div class="bg-white py-4 pl-[28px] pr-[60px] shadow-[0_4px_4px_0_rgba(0,0,0,0.25)]">
-                        <div class="grid grid-cols-3 gap-x-[80px] gap-y-5">
+                        <div class="grid grid-cols-4 gap-x-[44px] gap-y-4">
                             <MalioInputText
                                 v-model="accounting.siren"
                                 :label="t('commercial.clients.form.accounting.siren')"
@@ -301,7 +301,7 @@
                             v-bind="{ ariaLabel: t('commercial.clients.form.accounting.removeRib') }"
                             @click="askRemoveRib(index)"
                         />
-                        <div class="grid grid-cols-3 gap-x-[80px] gap-y-5">
+                        <div class="grid grid-cols-4 gap-x-[44px] gap-y-4">
                             <MalioInputText
                                 v-model="rib.label"
                                 :label="t('commercial.clients.form.accounting.ribLabel')"
@@ -341,7 +341,7 @@
             <!-- Onglet non encore implemente : frame vide, passage automatique.
                  Statistiques / Rapports / Echanges sont edit-only (absents a la
                  creation) — cf. buildClientFormTabKeys. -->
-            <template #transport><TabPlaceholderBlank /></template>
+            <template #transport><ComingSoonPlaceholder /></template>
         </MalioTabList>
 
         <!-- Modal de confirmation generique (suppression contact/adresse/RIB). -->
@@ -870,6 +870,8 @@ function addRib(): void {
 function askRemoveRib(index: number): void {
     askConfirm(t('commercial.clients.form.confirmDelete.rib'), () => {
         ribs.value.splice(index, 1)
+        // Garde au moins un bloc RIB visible (cf. amorce au montage).
+        if (ribs.value.length === 0) ribs.value.push(emptyRib())
     })
 }
 
@@ -956,5 +958,8 @@ interface ContactResponse {
 onMounted(() => {
     // Echec du chargement des referentiels non bloquant : les selects restent vides.
     referentials.loadCommon().catch(() => {})
+    // Au moins un bloc RIB toujours visible en creation : on amorce un bloc vide
+    // (non persiste tant qu'incomplet — RG-1.13).
+    if (ribs.value.length === 0) ribs.value.push(emptyRib())
 })
 </script>
diff --git a/frontend/public/coming-soon.gif b/frontend/public/coming-soon.gif
new file mode 100644
index 0000000..ef5f597
Binary files /dev/null and b/frontend/public/coming-soon.gif differ
diff --git a/frontend/shared/components/ui/ComingSoonPlaceholder.vue b/frontend/shared/components/ui/ComingSoonPlaceholder.vue
new file mode 100644
index 0000000..6d89eac
--- /dev/null
+++ b/frontend/shared/components/ui/ComingSoonPlaceholder.vue
@@ -0,0 +1,51 @@
+<template>
+    <!--
+        Placeholder generique « En cours de dev » pour les ecrans / onglets non
+        encore implementes. Composant PARTAGE (shared/components) : auto-importe
+        sans prefixe (`<ComingSoonPlaceholder>`) et reutilisable depuis n'importe
+        quel module. Affiche un gif (asset local par defaut) + un message i18n.
+    -->
+    <div class="flex min-h-[240px] flex-col items-center justify-center gap-4 rounded-md bg-white py-10">
+        <img
+            v-if="!imageFailed"
+            :src="src"
+            :alt="resolvedTitle"
+            class="max-h-[220px] w-auto rounded-md"
+            @error="imageFailed = true"
+        >
+        <!-- Repli si le gif ne charge pas (offline, CSP, asset absent) :
+             illustration emoji, le message reste affiche. -->
+        <div v-else class="text-5xl" aria-hidden="true">🚧 👨‍💻 🚧</div>
+
+        <div class="text-center">
+            <p class="text-xl font-bold text-black">{{ resolvedTitle }}</p>
+            <p class="mt-1 text-black/60">{{ resolvedSubtitle }}</p>
+        </div>
+    </div>
+</template>
+
+<script setup lang="ts">
+const props = withDefaults(
+    defineProps<{
+        /** Source de l'image/gif affichee. Defaut : asset local `/coming-soon.gif`. */
+        src?: string
+        /** Titre. Defaut : i18n `common.comingSoon.title`. */
+        title?: string
+        /** Sous-titre. Defaut : i18n `common.comingSoon.subtitle`. */
+        subtitle?: string
+    }>(),
+    {
+        src: '/coming-soon.gif',
+        title: '',
+        subtitle: '',
+    },
+)
+
+const { t } = useI18n()
+const imageFailed = ref(false)
+
+// Les props priment sur les libelles i18n par defaut (permet a un module
+// d'override le texte sans toucher au composant).
+const resolvedTitle = computed(() => props.title || t('common.comingSoon.title'))
+const resolvedSubtitle = computed(() => props.subtitle || t('common.comingSoon.subtitle'))
+</script>