import ods/xls en + de csv

fix modal behavior on close, fine tune import file modal

src/app/admin/campaigns/[id]/participants/page.tsx

@@ -7,7 +7,7 @@ import { campaignService, participantService, voteService } from '@/lib/services
 import AddParticipantModal from '@/components/AddParticipantModal';
 import EditParticipantModal from '@/components/EditParticipantModal';
 import DeleteParticipantModal from '@/components/DeleteParticipantModal';
-import ImportCSVModal from '@/components/ImportCSVModal';
+import ImportFileModal from '@/components/ImportFileModal';
 import SendParticipantEmailModal from '@/components/SendParticipantEmailModal';
 import { Button } from '@/components/ui/button';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
@@ -166,7 +166,7 @@ function CampaignParticipantsPageContent() {
             <div className="flex gap-2">
               <Button variant="outline" onClick={() => setShowImportModal(true)}>
                 <Upload className="w-4 h-4 mr-2" />
-                Importer CSV
+                Importer
               </Button>
               <Button onClick={() => setShowAddModal(true)} size="lg">
                 ✨ Nouveau participant
@@ -409,7 +409,7 @@ function CampaignParticipantsPageContent() {
           />
         )}
 
-        <ImportCSVModal
+        <ImportFileModal
           isOpen={showImportModal}
           onClose={() => setShowImportModal(false)}
           onImport={handleImportParticipants}