style(import): aligner l'UI d'import sur le design system settings

- Layout max-width supprimé → pleine largeur disponible
- Sections avec border-t et titres uppercase comme les settings
- FileImportCard : card → row (divide-y, py-3, pas de shadow/border)
- ImportResults : card → sections border-t inline dans la page
- Inputs : padding explicite, border explicite, sans rounded
- Suppression de tous les rounded-* sur la page (boutons, badges, images, zone upload)

assets/vue/app/shared/components/ui/FileUpload.vue

@@ -1,35 +1,23 @@
 <template>
   <div class="file-upload">
-    <label :for="inputId" class="block text-sm font-medium text-gray-700 mb-2">
+    <label :for="inputId" class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
       {{ label }}
     </label>
     
     <div 
-      class="mt-1 flex justify-center px-6 pt-5 pb-6 border-2 border-gray-300 border-dashed rounded-md"
-      :class="{ 'border-green-500 bg-green-50': isDragOver, 'hover:border-gray-400': !isDragOver }"
+      class="mt-1 flex justify-center px-6 pt-5 pb-6 border-2 border-gray-300 dark:border-gray-600 border-dashed "
+      :class="{ 'border-green-500 bg-green-50 dark:bg-green-900/20': isDragOver, 'hover:border-gray-400': !isDragOver }"
       @drop.prevent="handleDrop"
       @dragover.prevent="isDragOver = true"
       @dragleave.prevent="isDragOver = false"
     >
       <div class="space-y-1 text-center">
-        <svg 
-          class="mx-auto h-12 w-12 text-gray-400" 
-          stroke="currentColor" 
-          fill="none" 
-          viewBox="0 0 48 48"
-        >
-          <path 
-            d="M28 8H12a4 4 0 00-4 4v20m32-12v8m0 0v8a4 4 0 01-4 4H12a4 4 0 01-4-4v-4m32-4l-3.172-3.172a4 4 0 00-5.656 0L28 28M8 32l9.172-9.172a4 4 0 015.656 0L28 28m0 0l4 4m4-24h8m-4-4v8m-12 4h.02" 
-            stroke-width="2" 
-            stroke-linecap="round" 
-            stroke-linejoin="round" 
-          />
-        </svg>
+        <ArrowUpTrayIcon class="mx-auto h-12 w-12 text-gray-400 dark:text-gray-500" />
         
         <div class="flex text-sm text-gray-600">
           <label 
             :for="inputId" 
-            class="relative cursor-pointer bg-white rounded-md font-medium text-green-600 hover:text-green-500"
+            class="relative cursor-pointer font-medium text-green-600 hover:text-green-500"
           >
             <span>Sélectionner des fichiers</span>
             <input 
@@ -50,8 +38,8 @@
         </p>
         
         <div v-if="selectedFiles.length > 0" class="mt-4">
-          <h4 class="text-sm font-medium text-gray-700 mb-2">Fichiers sélectionnés :</h4>
-          <ul class="text-xs text-gray-600 space-y-1">
+          <h4 class="text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">Fichiers sélectionnés :</h4>
+          <ul class="text-xs text-gray-600 dark:text-gray-400 space-y-1">
             <li v-for="file in selectedFiles" :key="file.name" class="flex justify-between items-center">
               <span class="truncate">{{ file.name }}</span>
               <span class="text-gray-400">{{ formatFileSize(file.size) }}</span>
@@ -64,6 +52,7 @@
 </template>
 
 <script setup>
+import { ArrowUpTrayIcon } from '@heroicons/vue/24/outline';
 import { ref, computed, watch } from 'vue';
 
 const props = defineProps({