feat : modal d'export inventaire avec filtres par tranches d'âge

- UiModal : composant générique réutilisable (teleport, escape, backdrop, max-width configurable)
- InventoryExportModal : 3 checkboxes pour les tranches d'âge, footer centré sans annuler
- BovineRepository::findActiveForInventoryExport(?array $ageRanges) en DQL
- Endpoint inventory-export accepte ageRanges (comma-separated) en query param
- Aucune coche = export complet (comportement actuel intact)

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

frontend/pages/inventory.vue

@@ -17,7 +17,7 @@
                     class="bg-primary-500 p-1 rounded-md flex items-center cursor-pointer hover:opacity-80"
                     :class="exporting ? 'cursor-not-allowed opacity-60' : ''"
                     title="Exporter en Excel"
-                    @click="exportInventory"
+                    @click="showExportModal = true"
                 >
                     <Icon name="mdi:file-excel-outline" size="32" class="text-white" />
                 </div>
@@ -136,12 +136,19 @@
                 </template>
             </UiDataTable>
         </div>
+
+        <InventoryExportModal
+            v-model="showExportModal"
+            :loading="exporting"
+            @submit="exportInventory"
+        />
     </div>
 </template>
 
 
 <script setup lang="ts">
 import type { BovineData } from '~/services/dto/bovine-data'
+import type { InventoryExportFilters } from '~/components/inventory/inventory-export-modal.vue'
 import { useAuthStore } from '~/stores/auth'
 import { useDataTableServerState } from '~/composables/useDataTableServerState'
 import { useBovineColumns } from '~/composables/useBovineColumns'
@@ -183,12 +190,17 @@ const loadStats = async () => {
 
 const syncing = ref(false)
 const exporting = ref(false)
+const showExportModal = ref(false)
 
-const exportInventory = async () => {
+const exportInventory = async (filters: InventoryExportFilters) => {
     if (exporting.value) return
     exporting.value = true
     try {
-        const blob = await api.getBlob('bovines/inventory-export')
+        const query: Record<string, unknown> = {}
+        if (filters.ageRanges.length > 0) {
+            query.ageRanges = filters.ageRanges.join(',')
+        }
+        const blob = await api.getBlob('bovines/inventory-export', query)
         const filename = `inventaire_bovins_${new Date().toISOString().slice(0, 10)}.xlsx`
         const url = URL.createObjectURL(blob)
         const a = document.createElement('a')
@@ -199,6 +211,7 @@ const exportInventory = async () => {
         a.click()
         a.remove()
         setTimeout(() => URL.revokeObjectURL(url), 60_000)
+        showExportModal.value = false
     } catch {
         // toast déjà géré par useApi onResponseError
     } finally {