feat(front) : meta title sur chaque page

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/pages/admin/customer/[[id]].vue

@@ -96,6 +96,8 @@
 </template>
 
 <script setup lang="ts">
+useHead({ title: 'Client' })
+
 import {computed, reactive, ref, watch} from "vue"
 import {createCustomer, getCustomer, updateCustomer} from "~/services/customer"
 import type {CustomerData, CustomerFormData, CustomerPayload} from "~/services/dto/customer-data"