diff --git a/app/components/ConstructeurSelect.vue b/app/components/ConstructeurSelect.vue
index 311f4e5..589f1a8 100644
--- a/app/components/ConstructeurSelect.vue
+++ b/app/components/ConstructeurSelect.vue
@@ -20,16 +20,16 @@
         </button>
         <div
           v-if="openDropdown"
-          class="absolute z-20 mt-1 w-full max-h-48 overflow-y-auto bg-base-100 border border-base-200 rounded-box shadow-lg flex flex-col"
+          class="absolute z-20 mt-1 w-full max-h-60 overflow-y-auto bg-base-100 border border-base-200 rounded-box shadow-lg flex flex-col"
         >
           <div
-            v-if="options.length === 0"
+            v-if="filteredOptions.length === 0"
             class="px-3 py-2 text-xs text-gray-500"
           >
             Aucun fournisseur trouvé
           </div>
           <button
-            v-for="option in options"
+            v-for="option in filteredOptions"
             :key="option.id"
             type="button"
             class="w-full text-left px-3 py-2 hover:bg-base-200 focus:bg-base-200 focus:outline-none"
@@ -164,8 +164,7 @@ const openCreateModal = ref(false)
 const creating = ref(false)
 const options = ref<ConstructeurSummary[]>([])
 const selectedIds = ref<string[]>([])
-let searchTimeout: ReturnType<typeof setTimeout> | null = null
-let lastSearchTerm = ''
+
 
 const uniqueOptions = (items: ConstructeurSummary[] = []) => {
   const seen = new Map<string, ConstructeurSummary>()
@@ -182,32 +181,22 @@ const normalizedInitialOptions = computed(() =>
 )
 
 const applyOptions = (items: ConstructeurSummary[] = []) => {
-  const normalized = uniqueOptions([
+  options.value = uniqueOptions([
     ...normalizedInitialOptions.value,
     ...items,
   ])
-  const limited = normalized.slice(0, 10)
-
-  selectedIds.value.forEach((id) => {
-    if (!limited.some((item) => item.id === id)) {
-      const match =
-        normalized.find((item) => item.id === id) ||
-        constructeurs.value.find((item) => item.id === id)
-      if (match) {
-        if (limited.length >= 10) {
-          limited.pop()
-        }
-        limited.unshift(match)
-      }
-    }
-  })
-
-  options.value = uniqueOptions([
-    ...normalizedInitialOptions.value,
-    ...limited,
-  ])
 }
 
+const filteredOptions = computed(() => {
+  const term = searchTerm.value.trim().toLowerCase()
+  if (!term) return options.value
+  return options.value.filter((option) =>
+    (option.name ?? '').toLowerCase().includes(term)
+    || (option.email && option.email.toLowerCase().includes(term))
+    || (option.phone && option.phone.toLowerCase().includes(term))
+  )
+})
+
 const createForm = ref({
   name: '',
   email: '',
@@ -257,46 +246,20 @@ const extractDataArray = (data: unknown): ConstructeurSummary[] => {
 }
 
 const ensureOptionsLoaded = async (force = false) => {
-  if (!force && !searchTerm.value && constructeurs.value.length) {
+  if (!force && constructeurs.value.length) {
     applyOptions(constructeurs.value as ConstructeurSummary[])
     return
   }
 
-  if (!force && searchTerm.value === lastSearchTerm && options.value.length) {
-    return
-  }
-
-  if (options.value.length && !force) {
-    return
-  }
-
-  const result = await searchConstructeurs(searchTerm.value)
+  const result = await searchConstructeurs('')
   if (result.success) {
     applyOptions(extractDataArray(result.data))
-    lastSearchTerm = searchTerm.value
   }
 }
 
 const onSearch = () => {
   openDropdown.value = true
-  if (searchTimeout) {
-    clearTimeout(searchTimeout)
-  }
-  searchTimeout = setTimeout(async () => {
-    if (!searchTerm.value && constructeurs.value.length) {
-      applyOptions(constructeurs.value as ConstructeurSummary[])
-      lastSearchTerm = ''
-      return
-    }
-    if (searchTerm.value === lastSearchTerm) {
-      return
-    }
-    const result = await searchConstructeurs(searchTerm.value)
-    if (result.success) {
-      applyOptions(extractDataArray(result.data))
-      lastSearchTerm = searchTerm.value
-    }
-  }, 250)
+  ensureOptionsLoaded()
 }
 
 const toggleOption = (option: ConstructeurSummary) => {
@@ -319,9 +282,19 @@ const closeCreateModal = () => {
 }
 
 const handleCreate = async () => {
+  const trimmedName = createForm.value.name.trim()
+  const duplicate = options.value.find(
+    (o) => (o.name ?? '').toLowerCase() === trimmedName.toLowerCase(),
+  )
+  if (duplicate) {
+    emitSelection([...selectedIds.value, duplicate.id])
+    closeCreateModal()
+    return
+  }
+
   creating.value = true
   const payload: { name: string; email?: string; phone?: string } = {
-    name: createForm.value.name,
+    name: trimmedName,
   }
   if (createForm.value.email) {
     payload.email = createForm.value.email
@@ -383,9 +356,6 @@ watch(
   constructeurs,
   (list) => {
     applyOptions((list as ConstructeurSummary[]) || [])
-    if (!searchTerm.value) {
-      lastSearchTerm = ''
-    }
   },
   { immediate: true },
 )
@@ -405,9 +375,6 @@ onMounted(() => {
 
 onBeforeUnmount(() => {
   window.removeEventListener('click', clickHandler)
-  if (searchTimeout) {
-    clearTimeout(searchTimeout)
-  }
 })
 
 watch(
diff --git a/app/pages/constructeurs.vue b/app/pages/constructeurs.vue
index 0bfd49c..d9624a1 100644
--- a/app/pages/constructeurs.vue
+++ b/app/pages/constructeurs.vue
@@ -195,8 +195,18 @@ const closeModal = () => {
 }
 
 const saveConstructeur = async () => {
+  const trimmedName = form.value.name.trim()
+  const duplicate = constructeurs.value.find(
+    (c) => c.name.toLowerCase() === trimmedName.toLowerCase()
+      && c.id !== editingConstructeur.value?.id,
+  )
+  if (duplicate) {
+    showError(`Un fournisseur "${duplicate.name}" existe déjà.`)
+    return
+  }
+
   saving.value = true
-  const payload = { ...form.value }
+  const payload = { ...form.value, name: trimmedName }
   if (!payload.email) { delete payload.email }
   if (!payload.phone) { delete payload.phone }
   let result