feat(front) : meta title sur chaque page

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

frontend/pages/scan.vue

@@ -125,6 +125,8 @@
 </template>
 
 <script setup lang="ts">
+useHead({ title: 'Scanner' })
+
 import { ref, computed, nextTick, onMounted, watch } from 'vue'
 import { useBarcodeScanner } from '~/composables/useBarcodeScanner'
 import { createBovine } from '~/services/bovine'