diff --git a/frontend/modules/commercial/components/ClientAddressBlock.vue b/frontend/modules/commercial/components/ClientAddressBlock.vue
new file mode 100644
index 0000000..5cc1ce2
--- /dev/null
+++ b/frontend/modules/commercial/components/ClientAddressBlock.vue
@@ -0,0 +1,280 @@
+<template>
+    <div class="rounded-md border border-neutral-200 bg-white p-6">
+        <div class="mb-4 flex items-center justify-between">
+            <h3 class="text-lg font-bold">{{ title }}</h3>
+            <!-- ariaLabel via v-bind objet (prop camelCase ; aria-* serait un attribut HTML). -->
+            <MalioButtonIcon
+                v-if="removable && !readonly"
+                icon="mdi:trash-can-outline"
+                variant="ghost"
+                v-bind="{ ariaLabel: t('commercial.clients.form.address.remove') }"
+                @click="$emit('remove')"
+            />
+        </div>
+
+        <!-- Usage de l'adresse : Prospect exclusif de Livraison/Facturation
+             (RG-1.06/07/08). On masque l'option incompatible selon l'etat. -->
+        <div class="mb-4 flex flex-wrap gap-6">
+            <MalioCheckbox
+                v-if="canSelectProspect(model)"
+                :model-value="model.isProspect"
+                :label="t('commercial.clients.form.address.prospect')"
+                :readonly="readonly"
+                @update:model-value="(v: boolean) => toggleFlag('isProspect', v)"
+            />
+            <MalioCheckbox
+                v-if="canSelectDeliveryOrBilling(model)"
+                :model-value="model.isDelivery"
+                :label="t('commercial.clients.form.address.delivery')"
+                :readonly="readonly"
+                @update:model-value="(v: boolean) => toggleFlag('isDelivery', v)"
+            />
+            <MalioCheckbox
+                v-if="canSelectDeliveryOrBilling(model)"
+                :model-value="model.isBilling"
+                :label="t('commercial.clients.form.address.billing')"
+                :readonly="readonly"
+                @update:model-value="(v: boolean) => toggleFlag('isBilling', v)"
+            />
+        </div>
+
+        <div class="grid grid-cols-1 gap-4 md:grid-cols-2">
+            <MalioSelectCheckbox
+                :model-value="model.categoryIris"
+                :options="categoryOptions"
+                :label="t('commercial.clients.form.address.categories')"
+                :display-tag="true"
+                :disabled="readonly"
+                @update:model-value="(v: (string | number)[]) => update('categoryIris', v.map(String))"
+            />
+
+            <MalioSelect
+                :model-value="model.country"
+                :options="countryOptions"
+                :label="t('commercial.clients.form.address.country')"
+                :disabled="readonly"
+                @update:model-value="(v: string | number | null) => update('country', String(v ?? 'France'))"
+            />
+
+            <MalioInputText
+                :model-value="model.postalCode"
+                :label="t('commercial.clients.form.address.postalCode')"
+                :mask="POSTAL_CODE_MASK"
+                :readonly="readonly"
+                @update:model-value="onPostalCodeChange"
+            />
+
+            <!-- Ville : MalioSelect alimente par le code postal (BAN). En mode
+                 degrade (service indisponible), bascule en saisie libre. -->
+            <MalioSelect
+                v-if="!degraded"
+                :model-value="model.city"
+                :options="cityOptions"
+                :label="t('commercial.clients.form.address.city')"
+                :disabled="readonly"
+                empty-option-label=""
+                @update:model-value="(v: string | number | null) => update('city', v === null ? null : String(v))"
+            />
+            <MalioInputText
+                v-else
+                :model-value="model.city"
+                :label="t('commercial.clients.form.address.city')"
+                :readonly="readonly"
+                @update:model-value="(v: string) => update('city', v)"
+            />
+
+            <!-- Adresse : saisie assistee (BAN) ou libre en mode degrade. -->
+            <MalioInputAutocomplete
+                v-if="!degraded"
+                :model-value="model.street"
+                :options="addressOptions"
+                :loading="addressLoading"
+                :min-search-length="3"
+                :label="t('commercial.clients.form.address.street')"
+                :readonly="readonly"
+                @update:model-value="(v: string | number | null) => update('street', v === null ? null : String(v))"
+                @search="onAddressSearch"
+                @select="onAddressSelect"
+            />
+            <MalioInputText
+                v-else
+                :model-value="model.street"
+                :label="t('commercial.clients.form.address.street')"
+                :readonly="readonly"
+                @update:model-value="(v: string) => update('street', v)"
+            />
+
+            <MalioInputText
+                :model-value="model.streetComplement"
+                :label="t('commercial.clients.form.address.streetComplement')"
+                :readonly="readonly"
+                @update:model-value="(v: string) => update('streetComplement', v)"
+            />
+
+            <MalioSelectCheckbox
+                :model-value="model.siteIris"
+                :options="siteOptions"
+                :label="t('commercial.clients.form.address.sites')"
+                :display-tag="true"
+                :disabled="readonly"
+                @update:model-value="(v: (string | number)[]) => update('siteIris', v.map(String))"
+            />
+
+            <MalioSelectCheckbox
+                :model-value="model.contactIris"
+                :options="contactOptions"
+                :label="t('commercial.clients.form.address.contacts')"
+                :display-tag="true"
+                :disabled="readonly"
+                @update:model-value="(v: (string | number)[]) => update('contactIris', v.map(String))"
+            />
+
+            <!-- Email de facturation : visible/obligatoire seulement si Facturation
+                 est coche (RG-1.11). -->
+            <MalioInputText
+                v-if="isBillingEmailRequired(model)"
+                :model-value="model.billingEmail"
+                :label="t('commercial.clients.form.address.billingEmail')"
+                :required="true"
+                :readonly="readonly"
+                @update:model-value="(v: string) => update('billingEmail', v)"
+            />
+        </div>
+    </div>
+</template>
+
+<script setup lang="ts">
+import {
+    applyProspectExclusivity,
+    canSelectDeliveryOrBilling,
+    canSelectProspect,
+    isBillingEmailRequired,
+    type AddressFlagsDraft,
+} from '~/modules/commercial/utils/clientFormRules'
+import { useAddressAutocomplete, type AddressSuggestion } from '~/shared/composables/useAddressAutocomplete'
+import type { CategoryOption, RefOption } from '~/modules/commercial/composables/useClientReferentials'
+import type { AddressFormDraft } from '~/modules/commercial/types/clientForm'
+
+// Masque code postal FR : 5 chiffres.
+const POSTAL_CODE_MASK = '#####'
+
+const props = defineProps<{
+    /** Brouillon de l'adresse (v-model). */
+    modelValue: AddressFormDraft
+    title: string
+    /** Categories autorisees sur une adresse (DISTRIBUTEUR/COURTIER exclus, RG-1.29). */
+    categoryOptions: CategoryOption[]
+    /** Sites Starseed disponibles. */
+    siteOptions: RefOption[]
+    /** Contacts deja saisis, rattachables a l'adresse. */
+    contactOptions: RefOption[]
+    /** Pays disponibles (France par defaut). */
+    countryOptions: RefOption[]
+    removable?: boolean
+    readonly?: boolean
+}>()
+
+const emit = defineEmits<{
+    'update:modelValue': [value: AddressFormDraft]
+    'remove': []
+    /** Emis une fois quand le service d'autocompletion bascule en indisponible. */
+    'degraded': []
+}>()
+
+const { t } = useI18n()
+const autocomplete = useAddressAutocomplete()
+
+const model = computed(() => props.modelValue)
+
+// Mode degrade : service BAN indisponible → Ville/Adresse en saisie libre.
+const degraded = ref(false)
+const cityOptions = ref<RefOption[]>([])
+const addressOptions = ref<RefOption[]>([])
+const addressLoading = ref(false)
+// Conserve les suggestions d'adresse pour retrouver ville/CP au moment du select.
+let lastAddressSuggestions: AddressSuggestion[] = []
+
+/** Emet un nouveau brouillon avec le champ modifie (immutabilite). */
+function update<K extends keyof AddressFormDraft>(field: K, value: AddressFormDraft[K]): void {
+    emit('update:modelValue', { ...props.modelValue, [field]: value })
+}
+
+/** Applique l'exclusivite Prospect / (Livraison|Facturation) au changement. */
+function toggleFlag(field: keyof AddressFlagsDraft, value: boolean): void {
+    const flags = applyProspectExclusivity(
+        { isProspect: model.value.isProspect, isDelivery: model.value.isDelivery, isBilling: model.value.isBilling },
+        field,
+        value,
+    )
+    emit('update:modelValue', { ...props.modelValue, ...flags })
+}
+
+/** Bascule définitivement en mode degrade et previent le parent (toast unique). */
+function enterDegraded(): void {
+    if (!degraded.value) {
+        degraded.value = true
+        emit('degraded')
+    }
+}
+
+/** Saisie du code postal → met a jour le champ + interroge la BAN pour la ville. */
+async function onPostalCodeChange(value: string): Promise<void> {
+    update('postalCode', value)
+
+    if (degraded.value) {
+        return
+    }
+    const digits = (value ?? '').replace(/\D/g, '')
+    if (digits.length < 5) {
+        return
+    }
+    try {
+        const suggestions = await autocomplete.searchCity(digits)
+        cityOptions.value = suggestions.map(s => ({ value: s.city, label: s.city }))
+    }
+    catch {
+        enterDegraded()
+    }
+}
+
+/** Recherche d'adresse assistee (event de MalioInputAutocomplete). */
+async function onAddressSearch(query: string): Promise<void> {
+    if (degraded.value) {
+        return
+    }
+    addressLoading.value = true
+    try {
+        const postalCode = (model.value.postalCode ?? '').replace(/\D/g, '') || undefined
+        const suggestions = await autocomplete.searchAddress(query, postalCode)
+        lastAddressSuggestions = suggestions
+        addressOptions.value = suggestions.map(s => ({ value: s.street, label: s.label }))
+    }
+    catch {
+        enterDegraded()
+    }
+    finally {
+        addressLoading.value = false
+    }
+}
+
+/**
+ * Selection d'une suggestion d'adresse → remplit rue + ville + CP.
+ * Le type d'option suit le contrat MalioInputAutocomplete ({ label, value }).
+ */
+function onAddressSelect(option: { label: string, value: string | number } | null): void {
+    if (option === null) {
+        return
+    }
+    const suggestion = lastAddressSuggestions.find(s => s.street === option.value)
+    if (!suggestion) {
+        update('street', String(option.value))
+        return
+    }
+    emit('update:modelValue', {
+        ...props.modelValue,
+        street: suggestion.street,
+        city: suggestion.city,
+        postalCode: suggestion.postalCode,
+    })
+}
+</script>
diff --git a/frontend/modules/commercial/components/ClientContactBlock.vue b/frontend/modules/commercial/components/ClientContactBlock.vue
new file mode 100644
index 0000000..cc0c493
--- /dev/null
+++ b/frontend/modules/commercial/components/ClientContactBlock.vue
@@ -0,0 +1,102 @@
+<template>
+    <div class="rounded-md border border-neutral-200 bg-white p-6">
+        <div class="mb-4 flex items-center justify-between">
+            <h3 class="text-lg font-bold">{{ title }}</h3>
+            <!-- Suppression : ouvre une modal de confirmation cote parent. Masquee
+                 si non supprimable (1er bloc obligatoire RG-1.14) ou en lecture seule. -->
+            <!-- ariaLabel passe via v-bind objet : la prop du composant est
+                 camelCase (aria-* serait traite en attribut HTML, jamais en prop). -->
+            <MalioButtonIcon
+                v-if="removable && !readonly"
+                icon="mdi:trash-can-outline"
+                variant="ghost"
+                v-bind="{ ariaLabel: t('commercial.clients.form.contact.remove') }"
+                @click="$emit('remove')"
+            />
+        </div>
+
+        <div class="grid grid-cols-1 gap-4 md:grid-cols-2">
+            <MalioInputText
+                :model-value="model.lastName"
+                :label="t('commercial.clients.form.contact.lastName')"
+                :readonly="readonly"
+                @update:model-value="(v: string) => update('lastName', v)"
+            />
+            <MalioInputText
+                :model-value="model.firstName"
+                :label="t('commercial.clients.form.contact.firstName')"
+                :readonly="readonly"
+                @update:model-value="(v: string) => update('firstName', v)"
+            />
+            <MalioInputText
+                :model-value="model.jobTitle"
+                :label="t('commercial.clients.form.contact.jobTitle')"
+                :readonly="readonly"
+                @update:model-value="(v: string) => update('jobTitle', v)"
+            />
+            <MalioInputEmail
+                :model-value="model.email"
+                :label="t('commercial.clients.form.contact.email')"
+                :readonly="readonly"
+                @update:model-value="(v: string) => update('email', v)"
+            />
+            <MalioInputPhone
+                :model-value="model.phonePrimary"
+                :label="t('commercial.clients.form.contact.phonePrimary')"
+                :mask="PHONE_MASK"
+                :readonly="readonly"
+                :addable="!model.hasSecondaryPhone && !readonly"
+                :add-button-label="t('commercial.clients.form.contact.addPhone')"
+                @update:model-value="(v: string) => update('phonePrimary', v)"
+                @add="revealSecondaryPhone"
+            />
+            <MalioInputPhone
+                v-if="model.hasSecondaryPhone"
+                :model-value="model.phoneSecondary"
+                :label="t('commercial.clients.form.contact.phoneSecondary')"
+                :mask="PHONE_MASK"
+                :readonly="readonly"
+                @update:model-value="(v: string) => update('phoneSecondary', v)"
+            />
+        </div>
+    </div>
+</template>
+
+<script setup lang="ts">
+import type { ContactFormDraft } from '~/modules/commercial/types/clientForm'
+
+// Masque telephone FR : 5 groupes de 2 chiffres (la normalisation finale reste
+// serveur, cf. formatPhoneFR re-applique a la valeur renvoyee).
+const PHONE_MASK = '## ## ## ## ##'
+
+const props = defineProps<{
+    /** Brouillon du contact (v-model). */
+    modelValue: ContactFormDraft
+    /** Titre du bloc (ex: « Contact 1 »). */
+    title: string
+    /** Affiche l'icone de suppression (1er bloc non supprimable, RG-1.14). */
+    removable?: boolean
+    /** Bloc en lecture seule (onglet valide). */
+    readonly?: boolean
+}>()
+
+const emit = defineEmits<{
+    'update:modelValue': [value: ContactFormDraft]
+    'remove': []
+}>()
+
+const { t } = useI18n()
+
+// Alias local pour la lisibilite du template.
+const model = computed(() => props.modelValue)
+
+/** Emet un nouveau brouillon avec le champ modifie (immutabilite). */
+function update<K extends keyof ContactFormDraft>(field: K, value: ContactFormDraft[K]): void {
+    emit('update:modelValue', { ...props.modelValue, [field]: value })
+}
+
+/** Revele le 2e numero (RG-1.02/1.20 : max 1 secondaire, le « + » disparait). */
+function revealSecondaryPhone(): void {
+    emit('update:modelValue', { ...props.modelValue, hasSecondaryPhone: true })
+}
+</script>
diff --git a/frontend/modules/commercial/components/TabPlaceholderBlank.vue b/frontend/modules/commercial/components/TabPlaceholderBlank.vue
new file mode 100644
index 0000000..5375cb6
--- /dev/null
+++ b/frontend/modules/commercial/components/TabPlaceholderBlank.vue
@@ -0,0 +1,14 @@
+<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/composables/useClientReferentials.ts b/frontend/modules/commercial/composables/useClientReferentials.ts
new file mode 100644
index 0000000..941b111
--- /dev/null
+++ b/frontend/modules/commercial/composables/useClientReferentials.ts
@@ -0,0 +1,141 @@
+import { ref } from 'vue'
+
+/**
+ * Charge les referentiels (listes courtes) alimentant les selects de l'ecran
+ * « Ajouter un client » : categories, sites, modes de TVA, delais et types de
+ * reglement, banques, et les listes distributeurs / courtiers.
+ *
+ * Toutes les collections sont recuperees en entier via l'echappatoire prevue
+ * `?pagination=false` (referentiels de quelques dizaines d'entrees max), avec
+ * l'en-tete `Accept: application/ld+json` impose par API Platform 4 pour obtenir
+ * l'enveloppe Hydra (`member`). Les valeurs d'option sont les IRI Hydra (`@id`)
+ * pour pouvoir etre renvoyees telles quelles dans les payloads POST/PATCH
+ * (relations ManyToOne / ManyToMany).
+ *
+ * Etat 100 % local a l'instance (refs) — aucune persistance URL.
+ */
+
+/** Option generique au format attendu par MalioSelect / MalioSelectCheckbox ({ label, value }). */
+export interface RefOption {
+    value: string
+    label: string
+}
+
+/** Option de type de reglement enrichie de son code stable (RG-1.12 / RG-1.13). */
+export interface PaymentTypeOption extends RefOption {
+    code: string
+}
+
+/** Option de categorie enrichie de son code stable (filtrage RG-1.29 cote adresse). */
+export interface CategoryOption extends RefOption {
+    code: string
+}
+
+/** Option de client (distributeur / courtier) — value = IRI du client lie. */
+export type ClientOption = RefOption
+
+interface HydraMember {
+    '@id': string
+}
+
+interface CategoryMember extends HydraMember {
+    code: string
+    name: string
+}
+
+interface SiteMember extends HydraMember {
+    name: string
+}
+
+interface ReferentialMember extends HydraMember {
+    code: string
+    label: string
+}
+
+interface ClientMember extends HydraMember {
+    companyName: string
+}
+
+const LD_JSON_HEADERS = { Accept: 'application/ld+json' }
+
+export function useClientReferentials() {
+    const api = useApi()
+
+    const categories = ref<CategoryOption[]>([])
+    const sites = ref<RefOption[]>([])
+    const tvaModes = ref<RefOption[]>([])
+    const paymentDelays = ref<RefOption[]>([])
+    const paymentTypes = ref<PaymentTypeOption[]>([])
+    const banks = ref<RefOption[]>([])
+    const distributors = ref<ClientOption[]>([])
+    const brokers = ref<ClientOption[]>([])
+
+    /** Recupere une collection complete (pagination desactivee) en Hydra. */
+    async function fetchAll<T extends HydraMember>(
+        url: string,
+        query: Record<string, string | string[]> = {},
+    ): Promise<T[]> {
+        const res = await api.get<{ member?: T[] }>(
+            url,
+            { pagination: 'false', ...query },
+            { headers: LD_JSON_HEADERS, toast: false },
+        )
+        return res.member ?? []
+    }
+
+    /**
+     * Charge en parallele les referentiels communs (hors distributeurs/courtiers,
+     * charges a la demande selon la relation choisie). Les selects compta ne sont
+     * pertinents que si l'utilisateur a acces a l'onglet, mais le cout est
+     * negligeable et simplifie l'orchestration.
+     */
+    async function loadCommon(): Promise<void> {
+        const [cats, sitesList, tva, delays, types, banksList] = await Promise.all([
+            fetchAll<CategoryMember>('/categories'),
+            fetchAll<SiteMember>('/sites'),
+            fetchAll<ReferentialMember>('/tva_modes'),
+            fetchAll<ReferentialMember>('/payment_delays'),
+            fetchAll<ReferentialMember>('/payment_types'),
+            fetchAll<ReferentialMember>('/banks'),
+        ])
+
+        categories.value = cats.map(c => ({ value: c['@id'], label: c.name, code: c.code }))
+        sites.value = sitesList.map(s => ({ value: s['@id'], label: s.name }))
+        tvaModes.value = tva.map(t => ({ value: t['@id'], label: t.label }))
+        paymentDelays.value = delays.map(d => ({ value: d['@id'], label: d.label }))
+        paymentTypes.value = types.map(t => ({ value: t['@id'], label: t.label, code: t.code }))
+        banks.value = banksList.map(b => ({ value: b['@id'], label: b.label }))
+    }
+
+    /** Liste des clients pouvant etre choisis comme distributeur (code DISTRIBUTEUR). */
+    async function loadDistributors(): Promise<void> {
+        if (distributors.value.length > 0) {
+            return
+        }
+        const clients = await fetchAll<ClientMember>('/clients', { categoryCode: 'DISTRIBUTEUR' })
+        distributors.value = clients.map(c => ({ value: c['@id'], label: c.companyName }))
+    }
+
+    /** Liste des clients pouvant etre choisis comme courtier (code COURTIER). */
+    async function loadBrokers(): Promise<void> {
+        if (brokers.value.length > 0) {
+            return
+        }
+        const clients = await fetchAll<ClientMember>('/clients', { categoryCode: 'COURTIER' })
+        brokers.value = clients.map(c => ({ value: c['@id'], label: c.companyName }))
+    }
+
+    return {
+        categories,
+        sites,
+        tvaModes,
+        paymentDelays,
+        paymentTypes,
+        banks,
+        distributors,
+        brokers,
+        loadCommon,
+        loadDistributors,
+        loadBrokers,
+    }
+}