diff --git a/package-lock.json b/package-lock.json
index 9502558..afe58b8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,6 +21,7 @@
         "@supabase/supabase-js": "^2.56.0",
         "@types/dompurify": "^3.0.5",
         "@types/nodemailer": "^7.0.1",
+        "@types/qrcode": "^1.5.5",
         "@types/xlsx": "^0.0.35",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
@@ -29,6 +30,7 @@
         "lucide-react": "^0.541.0",
         "next": "15.5.0",
         "nodemailer": "^7.0.5",
+        "qrcode": "^1.5.4",
         "react": "19.1.0",
         "react-dom": "19.1.0",
         "tailwind-merge": "^3.3.1",
@@ -5105,6 +5107,15 @@
       "integrity": "sha512-PIzZZlEppgrpoT2QgbnDU+MMzuR6BbCjllj0bM70lWoejMeNJAxCchxnv7J3XFkI8MpygtRpzXrIlmWUBclP5A==",
       "license": "MIT"
     },
+    "node_modules/@types/qrcode": {
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/@types/qrcode/-/qrcode-1.5.5.tgz",
+      "integrity": "sha512-CdfBi/e3Qk+3Z/fXYShipBT13OJ2fDO2Q2w5CIP5anLTLIndQG9z6P1cnm+8zCWSpm5dnxMFd/uREtb0EXuQzg==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/react": {
       "version": "19.1.11",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.1.11.tgz",
@@ -5861,7 +5872,6 @@
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
       "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=8"
@@ -5871,7 +5881,6 @@
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
       "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "color-convert": "^2.0.1"
@@ -6423,7 +6432,6 @@
       "version": "5.3.1",
       "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
       "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=6"
@@ -6637,7 +6645,6 @@
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
       "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "devOptional": true,
       "license": "MIT",
       "dependencies": {
         "color-name": "~1.1.4"
@@ -6650,7 +6657,6 @@
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
       "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
-      "devOptional": true,
       "license": "MIT"
     },
     "node_modules/color-string": {
@@ -6922,6 +6928,15 @@
         }
       }
     },
+    "node_modules/decamelize": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
+      "integrity": "sha512-z2S+W9X73hAUUki+N+9Za2lBlun89zigOyGrsax+KUQ6wKW4ZoWpEYBkGhQjwAjjDCkWxhY0VKEhk8wzY7F5cA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/decimal.js": {
       "version": "10.6.0",
       "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-10.6.0.tgz",
@@ -7054,6 +7069,12 @@
         "node": "^14.15.0 || ^16.10.0 || >=18.0.0"
       }
     },
+    "node_modules/dijkstrajs": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/dijkstrajs/-/dijkstrajs-1.0.3.tgz",
+      "integrity": "sha512-qiSlmBq9+BCdCA/L46dw8Uy93mloxsPSbwnm5yrKn2vMPiy8KyAskTF6zuV/j5BMsmOGZDPs7KjU+mjb670kfA==",
+      "license": "MIT"
+    },
     "node_modules/doctrine": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-2.1.0.tgz",
@@ -8189,7 +8210,6 @@
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
       "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
-      "dev": true,
       "license": "ISC",
       "engines": {
         "node": "6.* || 8.* || >= 10.*"
@@ -8855,7 +8875,6 @@
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
       "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=8"
@@ -11392,7 +11411,6 @@
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
       "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=6"
@@ -11447,7 +11465,6 @@
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
       "integrity": "sha512-ak9Qy5Q7jYb2Wwcey5Fpvg2KoAc/ZIhLSLOSBmRmygPsGwkVVt0fZa0qrtMz+m6tJTAHfZQ8FnmB4MG4LWy7/w==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=8"
@@ -11632,6 +11649,15 @@
         "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
       }
     },
+    "node_modules/pngjs": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/pngjs/-/pngjs-5.0.0.tgz",
+      "integrity": "sha512-40QW5YalBNfQo5yRYmiw7Yz6TKKVr3h6970B2YE+3fQpsWcrbj1PzJgxeJ19DRQjhMbKPIuMY8rFaXc8moolVw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.13.0"
+      }
+    },
     "node_modules/possible-typed-array-names": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/possible-typed-array-names/-/possible-typed-array-names-1.1.0.tgz",
@@ -11785,6 +11811,127 @@
       ],
       "license": "MIT"
     },
+    "node_modules/qrcode": {
+      "version": "1.5.4",
+      "resolved": "https://registry.npmjs.org/qrcode/-/qrcode-1.5.4.tgz",
+      "integrity": "sha512-1ca71Zgiu6ORjHqFBDpnSMTR2ReToX4l1Au1VFLyVeBTFavzQnv5JxMFr3ukHVKpSrSA2MCk0lNJSykjUfz7Zg==",
+      "license": "MIT",
+      "dependencies": {
+        "dijkstrajs": "^1.0.1",
+        "pngjs": "^5.0.0",
+        "yargs": "^15.3.1"
+      },
+      "bin": {
+        "qrcode": "bin/qrcode"
+      },
+      "engines": {
+        "node": ">=10.13.0"
+      }
+    },
+    "node_modules/qrcode/node_modules/cliui": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-6.0.0.tgz",
+      "integrity": "sha512-t6wbgtoCXvAzst7QgXxJYqPt0usEfbgQdftEPbLL/cvv6HPE5VgvqCuAIDR0NgU52ds6rFwqrgakNLrHEjCbrQ==",
+      "license": "ISC",
+      "dependencies": {
+        "string-width": "^4.2.0",
+        "strip-ansi": "^6.0.0",
+        "wrap-ansi": "^6.2.0"
+      }
+    },
+    "node_modules/qrcode/node_modules/find-up": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/find-up/-/find-up-4.1.0.tgz",
+      "integrity": "sha512-PpOwAdQ/YlXQ2vj8a3h8IipDuYRi3wceVQQGYWxNINccq40Anw7BlsEXCMbt1Zt+OLA6Fq9suIpIWD0OsnISlw==",
+      "license": "MIT",
+      "dependencies": {
+        "locate-path": "^5.0.0",
+        "path-exists": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/qrcode/node_modules/locate-path": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-5.0.0.tgz",
+      "integrity": "sha512-t7hw9pI+WvuwNJXwk5zVHpyhIqzg2qTlklJOf0mVxGSbe3Fp2VieZcduNYjaLDoy6p9uGpQEGWG87WpMKlNq8g==",
+      "license": "MIT",
+      "dependencies": {
+        "p-locate": "^4.1.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/qrcode/node_modules/p-limit": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.3.0.tgz",
+      "integrity": "sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w==",
+      "license": "MIT",
+      "dependencies": {
+        "p-try": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/qrcode/node_modules/p-locate": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-4.1.0.tgz",
+      "integrity": "sha512-R79ZZ/0wAxKGu3oYMlz8jy/kbhsNrS7SKZ7PxEHBgJ5+F2mtFW2fK2cOtBh1cHYkQsbzFV7I+EoRKe6Yt0oK7A==",
+      "license": "MIT",
+      "dependencies": {
+        "p-limit": "^2.2.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/qrcode/node_modules/y18n": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.3.tgz",
+      "integrity": "sha512-JKhqTOwSrqNA1NY5lSztJ1GrBiUodLMmIZuLiDaMRJ+itFd+ABVE8XBjOvIWL+rSqNDC74LCSFmlb/U4UZ4hJQ==",
+      "license": "ISC"
+    },
+    "node_modules/qrcode/node_modules/yargs": {
+      "version": "15.4.1",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
+      "integrity": "sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==",
+      "license": "MIT",
+      "dependencies": {
+        "cliui": "^6.0.0",
+        "decamelize": "^1.2.0",
+        "find-up": "^4.1.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^4.2.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^18.1.2"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/qrcode/node_modules/yargs-parser": {
+      "version": "18.1.3",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
+      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
+      "license": "ISC",
+      "dependencies": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/querystringify": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/querystringify/-/querystringify-2.2.0.tgz",
@@ -11972,12 +12119,17 @@
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
       "integrity": "sha512-fGxEI7+wsG9xrvdjsrlmL22OMTTiHRwAMroiEeMgq8gzoLC/PQr7RsRDSTLUg/bZAZtF+TVIkHc6/4RIKrui+Q==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=0.10.0"
       }
     },
+    "node_modules/require-main-filename": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
+      "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
+      "license": "ISC"
+    },
     "node_modules/requires-port": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/requires-port/-/requires-port-1.0.0.tgz",
@@ -12188,6 +12340,12 @@
         "node": ">=10"
       }
     },
+    "node_modules/set-blocking": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
+      "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
+      "license": "ISC"
+    },
     "node_modules/set-function-length": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/set-function-length/-/set-function-length-1.2.2.tgz",
@@ -12541,7 +12699,6 @@
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
       "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "emoji-regex": "^8.0.0",
@@ -12556,7 +12713,6 @@
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
       "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/string.prototype.includes": {
@@ -12676,7 +12832,6 @@
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
       "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "ansi-regex": "^5.0.1"
@@ -13476,6 +13631,12 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/which-module": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.1.tgz",
+      "integrity": "sha512-iBdZ57RDvnOR9AGBhML2vFZf7h8vmBjhoaZqODJBFWHVtKkDmKuHai3cx5PgVMrX5YDNp27AofYbAwctSS+vhQ==",
+      "license": "ISC"
+    },
     "node_modules/which-typed-array": {
       "version": "1.1.19",
       "resolved": "https://registry.npmjs.org/which-typed-array/-/which-typed-array-1.1.19.tgz",
@@ -13530,7 +13691,6 @@
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
       "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "ansi-styles": "^4.0.0",
diff --git a/package.json b/package.json
index 651e6be..c1fa8d1 100644
--- a/package.json
+++ b/package.json
@@ -29,6 +29,7 @@
     "@supabase/supabase-js": "^2.56.0",
     "@types/dompurify": "^3.0.5",
     "@types/nodemailer": "^7.0.1",
+    "@types/qrcode": "^1.5.5",
     "@types/xlsx": "^0.0.35",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
@@ -37,6 +38,7 @@
     "lucide-react": "^0.541.0",
     "next": "15.5.0",
     "nodemailer": "^7.0.5",
+    "qrcode": "^1.5.4",
     "react": "19.1.0",
     "react-dom": "19.1.0",
     "tailwind-merge": "^3.3.1",
diff --git a/src/app/admin/campaigns/[id]/participants/page.tsx b/src/app/admin/campaigns/[id]/participants/page.tsx
index e342e35..ee5f9da 100644
--- a/src/app/admin/campaigns/[id]/participants/page.tsx
+++ b/src/app/admin/campaigns/[id]/participants/page.tsx
@@ -9,6 +9,7 @@ import EditParticipantModal from '@/components/EditParticipantModal';
 import DeleteParticipantModal from '@/components/DeleteParticipantModal';
 import ImportFileModal from '@/components/ImportFileModal';
 import SendParticipantEmailModal from '@/components/SendParticipantEmailModal';
+import ClearAllParticipantsModal from '@/components/ClearAllParticipantsModal';
 import { Button } from '@/components/ui/button';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Badge } from '@/components/ui/badge';
@@ -31,6 +32,7 @@ function CampaignParticipantsPageContent() {
   const [showDeleteModal, setShowDeleteModal] = useState(false);
   const [showImportModal, setShowImportModal] = useState(false);
   const [showSendEmailModal, setShowSendEmailModal] = useState(false);
+  const [showClearAllModal, setShowClearAllModal] = useState(false);
   const [selectedParticipant, setSelectedParticipant] = useState<Participant | null>(null);
   const [copiedParticipantId, setCopiedParticipantId] = useState<string | null>(null);
 
@@ -87,9 +89,9 @@ function CampaignParticipantsPageContent() {
     try {
       const participantsToCreate = data.map(row => ({
         campaign_id: campaignId,
-        first_name: row.first_name || '',
-        last_name: row.last_name || '',
-        email: row.email || ''
+        first_name: row.Prénom || '',
+        last_name: row.Nom || '',
+        email: row.Email || ''
       }));
 
       // Créer les participants un par un
@@ -103,6 +105,16 @@ function CampaignParticipantsPageContent() {
     }
   };
 
+  const handleClearAllParticipants = async () => {
+    try {
+      await participantService.deleteAllByCampaign(campaignId);
+      loadData();
+    } catch (error) {
+      console.error('Erreur lors de la suppression des participants:', error);
+      throw error;
+    }
+  };
+
   const getInitials = (firstName: string, lastName: string) => {
     return `${firstName.charAt(0)}${lastName.charAt(0)}`.toUpperCase();
   };
@@ -182,6 +194,16 @@ function CampaignParticipantsPageContent() {
                 <Upload className="w-4 h-4 mr-2" />
                 Importer
               </Button>
+              {participants.length > 0 && (
+                <Button 
+                  variant="outline" 
+                  onClick={() => setShowClearAllModal(true)}
+                  className="text-red-600 border-red-200 hover:bg-red-50 hover:border-red-300 dark:text-red-400 dark:border-red-800 dark:hover:bg-red-900/20"
+                >
+                  <User className="w-4 h-4 mr-2" />
+                  Tout effacer
+                </Button>
+              )}
               <Button onClick={() => setShowAddModal(true)} size="lg">
                 ✨ Nouveau participant
               </Button>
@@ -377,6 +399,14 @@ function CampaignParticipantsPageContent() {
             campaign={campaign}
           />
         )}
+
+        <ClearAllParticipantsModal
+          isOpen={showClearAllModal}
+          onClose={() => setShowClearAllModal(false)}
+          onConfirm={handleClearAllParticipants}
+          campaignTitle={campaign?.title}
+          participantCount={participants.length}
+        />
       </div>
     </div>
   );
diff --git a/src/app/admin/campaigns/[id]/propositions/page.tsx b/src/app/admin/campaigns/[id]/propositions/page.tsx
index cd5c089..f888b8e 100644
--- a/src/app/admin/campaigns/[id]/propositions/page.tsx
+++ b/src/app/admin/campaigns/[id]/propositions/page.tsx
@@ -8,6 +8,8 @@ import AddPropositionModal from '@/components/AddPropositionModal';
 import EditPropositionModal from '@/components/EditPropositionModal';
 import DeletePropositionModal from '@/components/DeletePropositionModal';
 import ImportFileModal from '@/components/ImportFileModal';
+import ExportPropositionsButton from '@/components/ExportPropositionsButton';
+import ClearAllPropositionsModal from '@/components/ClearAllPropositionsModal';
 import { Button } from '@/components/ui/button';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
 
@@ -29,6 +31,7 @@ function CampaignPropositionsPageContent() {
   const [showEditModal, setShowEditModal] = useState(false);
   const [showDeleteModal, setShowDeleteModal] = useState(false);
   const [showImportModal, setShowImportModal] = useState(false);
+  const [showClearAllModal, setShowClearAllModal] = useState(false);
   const [selectedProposition, setSelectedProposition] = useState<Proposition | null>(null);
 
   useEffect(() => {
@@ -84,11 +87,11 @@ function CampaignPropositionsPageContent() {
     try {
       const propositionsToCreate = data.map(row => ({
         campaign_id: campaignId,
-        title: row.title || '',
-        description: row.description || '',
-        author_first_name: row.author_first_name || 'admin',
-        author_last_name: row.author_last_name || 'admin',
-        author_email: row.author_email || 'admin@example.com'
+        title: row.Titre || '',
+        description: row.Description || '',
+        author_first_name: row.Prénom || 'admin',
+        author_last_name: row.Nom || 'admin',
+        author_email: row.Email || 'admin@example.com'
       }));
 
       // Créer les propositions une par une
@@ -102,7 +105,15 @@ function CampaignPropositionsPageContent() {
     }
   };
 
-
+  const handleClearAllPropositions = async () => {
+    try {
+      await propositionService.deleteAllByCampaign(campaignId);
+      loadData();
+    } catch (error) {
+      console.error('Erreur lors de la suppression des propositions:', error);
+      throw error;
+    }
+  };
 
   const getInitials = (firstName: string, lastName: string) => {
     return `${firstName.charAt(0)}${lastName.charAt(0)}`.toUpperCase();
@@ -171,6 +182,20 @@ function CampaignPropositionsPageContent() {
                 <Upload className="w-4 h-4 mr-2" />
                 Importer
               </Button>
+              <ExportPropositionsButton 
+                propositions={propositions}
+                campaignTitle={campaign.title}
+              />
+              {propositions.length > 0 && (
+                <Button 
+                  variant="outline" 
+                  onClick={() => setShowClearAllModal(true)}
+                  className="text-red-600 border-red-200 hover:bg-red-50 hover:border-red-300 dark:text-red-400 dark:border-red-800 dark:hover:bg-red-900/20"
+                >
+                  <FileText className="w-4 h-4 mr-2" />
+                  Tout effacer
+                </Button>
+              )}
               <Button onClick={() => setShowAddModal(true)} size="lg">
                 ✨ Nouvelle proposition
               </Button>
@@ -299,6 +324,14 @@ function CampaignPropositionsPageContent() {
           type="propositions"
           campaignTitle={campaign?.title}
         />
+
+        <ClearAllPropositionsModal
+          isOpen={showClearAllModal}
+          onClose={() => setShowClearAllModal(false)}
+          onConfirm={handleClearAllPropositions}
+          campaignTitle={campaign?.title}
+          propositionCount={propositions.length}
+        />
       </div>
     </div>
   );
diff --git a/src/app/admin/page.tsx b/src/app/admin/page.tsx
index 87ee60c..29ccce7 100644
--- a/src/app/admin/page.tsx
+++ b/src/app/admin/page.tsx
@@ -7,6 +7,7 @@ import { authService } from '@/lib/auth';
 import CreateCampaignModal from '@/components/CreateCampaignModal';
 import EditCampaignModal from '@/components/EditCampaignModal';
 import DeleteCampaignModal from '@/components/DeleteCampaignModal';
+import ShareModal from '@/components/ShareModal';
 import { Button } from '@/components/ui/button';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
 import { Badge } from '@/components/ui/badge';
@@ -14,7 +15,7 @@ import { Badge } from '@/components/ui/badge';
 
 import AuthGuard from '@/components/AuthGuard';
 import Footer from '@/components/Footer';
-import { FolderOpen, Users, FileText, Plus, BarChart3, Settings, Check, Copy, Mail } from 'lucide-react';
+import { FolderOpen, Users, FileText, Plus, BarChart3, Settings, Check, Copy, Mail, Share2 } from 'lucide-react';
 import StatusSwitch from '@/components/StatusSwitch';
 import { MarkdownContent } from '@/components/MarkdownContent';
 
@@ -27,6 +28,7 @@ function AdminPageContent() {
   const [showCreateModal, setShowCreateModal] = useState(false);
   const [showEditModal, setShowEditModal] = useState(false);
   const [showDeleteModal, setShowDeleteModal] = useState(false);
+  const [showShareModal, setShowShareModal] = useState(false);
   const [selectedCampaign, setSelectedCampaign] = useState<Campaign | null>(null);
 
   const [copiedCampaignId, setCopiedCampaignId] = useState<string | null>(null);
@@ -433,6 +435,18 @@ function AdminPageContent() {
                                   <Copy className="w-3 h-3" />
                                 )}
                               </Button>
+                              <Button
+                                variant="ghost"
+                                size="sm"
+                                className="h-7 w-7 p-0 text-slate-400 hover:text-slate-600"
+                                onClick={() => {
+                                  setSelectedCampaign(campaign);
+                                  setShowShareModal(true);
+                                }}
+                                title="Partager le lien"
+                              >
+                                <Share2 className="w-3 h-3" />
+                              </Button>
                             </div>
                           </div>
                         </div>
@@ -474,6 +488,14 @@ function AdminPageContent() {
         {selectedCampaign && (
           <DeleteCampaignModal isOpen={showDeleteModal} onClose={() => setShowDeleteModal(false)} onSuccess={handleCampaignDeleted} campaign={selectedCampaign} />
         )}
+        {selectedCampaign && (
+          <ShareModal 
+            isOpen={showShareModal} 
+            onClose={() => setShowShareModal(false)} 
+            campaignTitle={selectedCampaign.title}
+            depositUrl={`${window.location.origin}/p/${selectedCampaign.slug || 'campagne'}`}
+          />
+        )}
         
         {/* Footer */}
         <Footer />
diff --git a/src/app/admin/settings/page.tsx b/src/app/admin/settings/page.tsx
index f7c15ec..e303f10 100644
--- a/src/app/admin/settings/page.tsx
+++ b/src/app/admin/settings/page.tsx
@@ -12,6 +12,7 @@ import Footer from '@/components/Footer';
 import SmtpSettingsForm from '@/components/SmtpSettingsForm';
 import { Settings, Monitor, Save, CheckCircle, Mail, FileText, Download } from 'lucide-react';
 import { ExportAnonymizationSelect, AnonymizationLevel } from '@/components/ExportAnonymizationSelect';
+import { ExportFileFormatSelect, ExportFileFormat } from '@/components/ExportFileFormatSelect';
 
 export const dynamic = 'force-dynamic';
 
@@ -24,6 +25,18 @@ function SettingsPageContent() {
   const [proposePageMessage, setProposePageMessage] = useState('');
   const [footerMessage, setFooterMessage] = useState('');
   const [exportAnonymization, setExportAnonymization] = useState<AnonymizationLevel>('full');
+  const [exportFileFormat, setExportFileFormat] = useState<ExportFileFormat>('ods');
+  
+  // États pour la détection des modifications
+  const [hasUnsavedChanges, setHasUnsavedChanges] = useState(false);
+  const [originalValues, setOriginalValues] = useState<{
+    randomizePropositions: boolean;
+    proposePageMessage: string;
+    footerMessage: string;
+    exportAnonymization: AnonymizationLevel;
+    exportFileFormat: ExportFileFormat;
+  } | null>(null);
+  const [autoSaved, setAutoSaved] = useState(false);
 
   useEffect(() => {
     // Vérifier la configuration Supabase
@@ -42,6 +55,34 @@ function SettingsPageContent() {
     loadSettings();
   }, []);
 
+  // Détecter les modifications
+  useEffect(() => {
+    if (!originalValues) return;
+    
+    const hasChanges = 
+      randomizePropositions !== originalValues.randomizePropositions ||
+      proposePageMessage !== originalValues.proposePageMessage ||
+      footerMessage !== originalValues.footerMessage ||
+      exportAnonymization !== originalValues.exportAnonymization ||
+      exportFileFormat !== originalValues.exportFileFormat;
+    
+    setHasUnsavedChanges(hasChanges);
+  }, [randomizePropositions, proposePageMessage, footerMessage, exportAnonymization, exportFileFormat, originalValues]);
+
+  // Avertissement avant de quitter la page
+  useEffect(() => {
+    const handleBeforeUnload = (e: BeforeUnloadEvent) => {
+      if (hasUnsavedChanges) {
+        e.preventDefault();
+        e.returnValue = 'Vous avez des modifications non sauvegardées. Êtes-vous sûr de vouloir quitter ?';
+        return e.returnValue;
+      }
+    };
+
+    window.addEventListener('beforeunload', handleBeforeUnload);
+    return () => window.removeEventListener('beforeunload', handleBeforeUnload);
+  }, [hasUnsavedChanges]);
+
   const loadSettings = async () => {
     try {
       setLoading(true);
@@ -63,6 +104,19 @@ function SettingsPageContent() {
       // Charger le niveau d'anonymisation des exports
       const anonymizationValue = await settingsService.getStringValue('export_anonymization', 'full') as AnonymizationLevel;
       setExportAnonymization(anonymizationValue);
+      
+      // Charger le format de fichier d'export
+      const fileFormatValue = await settingsService.getStringValue('export_file_format', 'ods') as ExportFileFormat;
+      setExportFileFormat(fileFormatValue);
+      
+      // Stocker les valeurs originales pour la détection des modifications
+      setOriginalValues({
+        randomizePropositions: randomizeValue,
+        proposePageMessage: messageValue,
+        footerMessage: footerValue,
+        exportAnonymization: anonymizationValue,
+        exportFileFormat: fileFormatValue
+      });
     } catch (error) {
       console.error('Erreur lors du chargement des paramètres:', error);
     } finally {
@@ -72,17 +126,82 @@ function SettingsPageContent() {
 
   const handleRandomizeChange = async (checked: boolean) => {
     setRandomizePropositions(checked);
+    // Sauvegarde automatique pour ce paramètre
+    try {
+      await settingsService.setBooleanValue('randomize_propositions', checked);
+      // Mettre à jour les valeurs originales
+      if (originalValues) {
+        setOriginalValues({
+          ...originalValues,
+          randomizePropositions: checked
+        });
+      }
+      // Afficher la confirmation de sauvegarde automatique
+      setAutoSaved(true);
+      setTimeout(() => setAutoSaved(false), 2000);
+    } catch (error) {
+      console.error('Erreur lors de la sauvegarde automatique:', error);
+    }
+  };
+
+  const handleExportAnonymizationChange = async (value: AnonymizationLevel) => {
+    setExportAnonymization(value);
+    // Sauvegarde automatique pour ce paramètre
+    try {
+      await settingsService.setStringValue('export_anonymization', value);
+      // Mettre à jour les valeurs originales
+      if (originalValues) {
+        setOriginalValues({
+          ...originalValues,
+          exportAnonymization: value
+        });
+      }
+      // Afficher la confirmation de sauvegarde automatique
+      setAutoSaved(true);
+      setTimeout(() => setAutoSaved(false), 2000);
+    } catch (error) {
+      console.error('Erreur lors de la sauvegarde automatique:', error);
+    }
+  };
+
+  const handleExportFileFormatChange = async (value: ExportFileFormat) => {
+    setExportFileFormat(value);
+    // Sauvegarde automatique pour ce paramètre
+    try {
+      await settingsService.setStringValue('export_file_format', value);
+      // Mettre à jour les valeurs originales
+      if (originalValues) {
+        setOriginalValues({
+          ...originalValues,
+          exportFileFormat: value
+        });
+      }
+      // Afficher la confirmation de sauvegarde automatique
+      setAutoSaved(true);
+      setTimeout(() => setAutoSaved(false), 2000);
+    } catch (error) {
+      console.error('Erreur lors de la sauvegarde automatique:', error);
+    }
   };
 
   const handleSave = async () => {
     try {
       setSaving(true);
-      await settingsService.setBooleanValue('randomize_propositions', randomizePropositions);
+      // Sauvegarder seulement les paramètres qui ne sont pas sauvegardés automatiquement
       await settingsService.setStringValue('propose_page_message', proposePageMessage);
       await settingsService.setStringValue('footer_message', footerMessage);
-      await settingsService.setStringValue('export_anonymization', exportAnonymization);
+      
+      // Mettre à jour les valeurs originales
+      setOriginalValues({
+        randomizePropositions,
+        proposePageMessage,
+        footerMessage,
+        exportAnonymization,
+        exportFileFormat
+      });
+      
       setSaved(true);
-      setTimeout(() => setSaved(false), 2000);
+      setTimeout(() => setSaved(false), 3000); // Message plus long pour les textes
     } catch (error) {
       console.error('Erreur lors de la sauvegarde des paramètres:', error);
     } finally {
@@ -115,13 +234,36 @@ function SettingsPageContent() {
         <div className="mb-8">
           <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4">
             <div>
-              <h1 className="text-3xl font-bold text-slate-900 dark:text-slate-100">Paramètres</h1>
-              <p className="text-slate-600 dark:text-slate-300 mt-2">Configurez les paramètres de l'application</p>
+              <div className="flex items-center gap-3">
+                <h1 className="text-3xl font-bold text-slate-900 dark:text-slate-100">Paramètres</h1>
+                {hasUnsavedChanges && (
+                  <div className="flex items-center gap-2 px-3 py-1 bg-orange-100 dark:bg-orange-900/30 text-orange-700 dark:text-orange-300 rounded-full text-sm font-medium">
+                    <div className="w-2 h-2 bg-orange-500 rounded-full animate-pulse"></div>
+                    Modifications non sauvegardées
+                  </div>
+                )}
+                {autoSaved && (
+                  <div className="flex items-center gap-2 px-3 py-1 bg-green-100 dark:bg-green-900/30 text-green-700 dark:text-green-300 rounded-full text-sm font-medium">
+                    <CheckCircle className="w-4 h-4" />
+                    Sauvegardé automatiquement
+                  </div>
+                )}
+              </div>
+              <p className="text-slate-600 dark:text-slate-300 mt-2">
+                {hasUnsavedChanges 
+                  ? 'Vous avez des modifications non sauvegardées. N\'oubliez pas de cliquer sur "Sauvegarder".'
+                  : 'Configurez les paramètres de l\'application'
+                }
+              </p>
             </div>
             <Button 
               onClick={handleSave} 
-              disabled={saving}
-              className="flex items-center gap-2"
+              disabled={saving || !hasUnsavedChanges}
+              className={`flex items-center gap-2 ${
+                hasUnsavedChanges 
+                  ? 'bg-orange-600 hover:bg-orange-700 text-white' 
+                  : ''
+              }`}
             >
               {saving ? (
                 <>
@@ -207,13 +349,25 @@ function SettingsPageContent() {
                     Ce texte apparaît sous le titre de la campagne pour inviter les utilisateurs à déposer des propositions.
                   </p>
                 </div>
-                <textarea
-                  id="propose-page-message"
-                  value={proposePageMessage}
-                  onChange={(e) => setProposePageMessage(e.target.value)}
-                  className="w-full min-h-[100px] p-3 border border-slate-200 dark:border-slate-700 rounded-lg bg-white dark:bg-slate-800 text-slate-900 dark:text-slate-100 resize-y"
-                  placeholder="Entrez votre message d'invitation..."
-                />
+                <div className="relative">
+                  <textarea
+                    id="propose-page-message"
+                    value={proposePageMessage}
+                    onChange={(e) => setProposePageMessage(e.target.value)}
+                    className={`w-full min-h-[100px] p-3 border rounded-lg bg-white dark:bg-slate-800 text-slate-900 dark:text-slate-100 resize-y ${
+                      originalValues && proposePageMessage !== originalValues.proposePageMessage
+                        ? 'border-orange-300 dark:border-orange-600 bg-orange-50 dark:bg-orange-900/20'
+                        : 'border-slate-200 dark:border-slate-700'
+                    }`}
+                    placeholder="Entrez votre message d'invitation..."
+                  />
+                  {originalValues && proposePageMessage !== originalValues.proposePageMessage && (
+                    <div className="absolute top-2 right-2 flex items-center gap-1 px-2 py-1 bg-orange-100 dark:bg-orange-900/50 text-orange-700 dark:text-orange-300 rounded text-xs font-medium">
+                      <div className="w-1.5 h-1.5 bg-orange-500 rounded-full animate-pulse"></div>
+                      Modifié
+                    </div>
+                  )}
+                </div>
               </div>
 
               {/* Footer Message Setting */}
@@ -226,13 +380,25 @@ function SettingsPageContent() {
                     Ce texte apparaît en bas des pages publiques. Vous pouvez utiliser <code className="bg-slate-100 dark:bg-slate-700 px-1 rounded text-xs">[texte du lien](GITURL)</code> pour insérer un lien vers le repository Git.
                   </p>
                 </div>
-                                  <textarea
+                <div className="relative">
+                  <textarea
                     id="footer-message"
                     value={footerMessage}
                     onChange={(e) => setFooterMessage(e.target.value)}
-                    className="w-full min-h-[80px] p-3 border border-slate-200 dark:border-slate-700 rounded-lg bg-white dark:bg-slate-800 text-slate-900 dark:text-slate-100 resize-y"
+                    className={`w-full min-h-[80px] p-3 border rounded-lg bg-white dark:bg-slate-800 text-slate-900 dark:text-slate-100 resize-y ${
+                      originalValues && footerMessage !== originalValues.footerMessage
+                        ? 'border-orange-300 dark:border-orange-600 bg-orange-50 dark:bg-orange-900/20'
+                        : 'border-slate-200 dark:border-slate-700'
+                    }`}
                     placeholder="Entrez votre message de bas de page..."
                   />
+                  {originalValues && footerMessage !== originalValues.footerMessage && (
+                    <div className="absolute top-2 right-2 flex items-center gap-1 px-2 py-1 bg-orange-100 dark:bg-orange-900/50 text-orange-700 dark:text-orange-300 rounded text-xs font-medium">
+                      <div className="w-1.5 h-1.5 bg-orange-500 rounded-full animate-pulse"></div>
+                      Modifié
+                    </div>
+                  )}
+                </div>
               </div>
             </CardContent>
           </Card>
@@ -253,10 +419,14 @@ function SettingsPageContent() {
               </div>
             </CardHeader>
             <CardContent className="space-y-6">
-              <div className="p-4 bg-slate-50 dark:bg-slate-800 rounded-lg">
+              <div className="p-4 bg-slate-50 dark:bg-slate-800 rounded-lg space-y-6">
                 <ExportAnonymizationSelect
                   value={exportAnonymization}
-                  onValueChange={setExportAnonymization}
+                  onValueChange={handleExportAnonymizationChange}
+                />
+                <ExportFileFormatSelect
+                  value={exportFileFormat}
+                  onValueChange={handleExportFileFormatChange}
                 />
               </div>
             </CardContent>
diff --git a/src/components/ClearAllParticipantsModal.tsx b/src/components/ClearAllParticipantsModal.tsx
new file mode 100644
index 0000000..0b7c06c
--- /dev/null
+++ b/src/components/ClearAllParticipantsModal.tsx
@@ -0,0 +1,125 @@
+'use client';
+
+import { useState } from 'react';
+import { Button } from '@/components/ui/button';
+import { Alert, AlertDescription } from '@/components/ui/alert';
+import { AlertTriangle, Trash2 } from 'lucide-react';
+import { BaseModal } from './base/BaseModal';
+import { ErrorDisplay } from './base/ErrorDisplay';
+
+interface ClearAllParticipantsModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  onConfirm: () => Promise<void>;
+  campaignTitle?: string;
+  participantCount: number;
+}
+
+export default function ClearAllParticipantsModal({ 
+  isOpen, 
+  onClose, 
+  onConfirm,
+  campaignTitle,
+  participantCount 
+}: ClearAllParticipantsModalProps) {
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState('');
+
+  const handleConfirm = async () => {
+    setLoading(true);
+    setError('');
+    
+    try {
+      await onConfirm();
+      onClose();
+    } catch (error) {
+      console.error('Erreur lors de la suppression des participants:', error);
+      setError('Erreur lors de la suppression des participants.');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const handleClose = () => {
+    if (!loading) {
+      setError('');
+      onClose();
+    }
+  };
+
+  const footer = (
+    <>
+      <Button variant="outline" onClick={handleClose} disabled={loading}>
+        Annuler
+      </Button>
+      <Button 
+        variant="destructive" 
+        onClick={handleConfirm} 
+        disabled={loading}
+        className="bg-red-600 hover:bg-red-700"
+      >
+        {loading ? (
+          <>
+            <div className="animate-spin rounded-full h-4 w-4 border-b-2 border-white mr-2"></div>
+            Suppression...
+          </>
+        ) : (
+          <>
+            <Trash2 className="w-4 h-4 mr-2" />
+            Tout effacer
+          </>
+        )}
+      </Button>
+    </>
+  );
+
+  return (
+    <BaseModal
+      isOpen={isOpen}
+      onClose={handleClose}
+      title="Effacer tous les participants"
+      description={`Cette action supprimera définitivement tous les participants de la campagne.${campaignTitle ? ` Campagne : ${campaignTitle}` : ''}`}
+      footer={footer}
+      maxWidth="sm:max-w-md"
+    >
+      <ErrorDisplay error={error} />
+
+      <Alert className="border-red-200 bg-red-50 dark:bg-red-900/20 dark:border-red-800">
+        <AlertTriangle className="h-4 w-4 text-red-600 dark:text-red-400" />
+        <AlertDescription className="text-red-800 dark:text-red-200">
+          <strong>Attention :</strong> Cette action est irréversible. 
+          {participantCount > 0 && (
+            <>
+              {' '}Vous êtes sur le point de supprimer <strong>{participantCount} participant{participantCount > 1 ? 's' : ''}</strong>.
+            </>
+          )}
+        </AlertDescription>
+      </Alert>
+
+      <div className="mt-4 p-4 bg-slate-50 dark:bg-slate-800 rounded-lg">
+        <h4 className="font-medium text-slate-900 dark:text-slate-100 mb-2">
+          Que sera supprimé :
+        </h4>
+        <ul className="text-sm text-slate-600 dark:text-slate-300 space-y-1">
+          <li>• Tous les participants de la campagne</li>
+          <li>• Les noms et prénoms des participants</li>
+          <li>• Les adresses email des participants</li>
+          <li>• Tous les votes associés aux participants</li>
+          <li>• Les liens de vote personnalisés</li>
+        </ul>
+      </div>
+
+      <div className="mt-4 p-4 bg-blue-50 dark:bg-blue-900/20 rounded-lg">
+        <h4 className="font-medium text-blue-900 dark:text-blue-100 mb-2">
+          Ce qui sera conservé :
+        </h4>
+        <ul className="text-sm text-blue-800 dark:text-blue-200 space-y-1">
+          <li>• La campagne elle-même</li>
+          <li>• Les propositions</li>
+          <li>• Les paramètres de la campagne</li>
+          <li>• L'historique des modifications</li>
+        </ul>
+      </div>
+    </BaseModal>
+  );
+}
diff --git a/src/components/ClearAllPropositionsModal.tsx b/src/components/ClearAllPropositionsModal.tsx
new file mode 100644
index 0000000..c95c869
--- /dev/null
+++ b/src/components/ClearAllPropositionsModal.tsx
@@ -0,0 +1,124 @@
+'use client';
+
+import { useState } from 'react';
+import { Button } from '@/components/ui/button';
+import { Alert, AlertDescription } from '@/components/ui/alert';
+import { AlertTriangle, Trash2 } from 'lucide-react';
+import { BaseModal } from './base/BaseModal';
+import { ErrorDisplay } from './base/ErrorDisplay';
+
+interface ClearAllPropositionsModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  onConfirm: () => Promise<void>;
+  campaignTitle?: string;
+  propositionCount: number;
+}
+
+export default function ClearAllPropositionsModal({ 
+  isOpen, 
+  onClose, 
+  onConfirm,
+  campaignTitle,
+  propositionCount 
+}: ClearAllPropositionsModalProps) {
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState('');
+
+  const handleConfirm = async () => {
+    setLoading(true);
+    setError('');
+    
+    try {
+      await onConfirm();
+      onClose();
+    } catch (error) {
+      console.error('Erreur lors de la suppression des propositions:', error);
+      setError('Erreur lors de la suppression des propositions.');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const handleClose = () => {
+    if (!loading) {
+      setError('');
+      onClose();
+    }
+  };
+
+  const footer = (
+    <>
+      <Button variant="outline" onClick={handleClose} disabled={loading}>
+        Annuler
+      </Button>
+      <Button 
+        variant="destructive" 
+        onClick={handleConfirm} 
+        disabled={loading}
+        className="bg-red-600 hover:bg-red-700"
+      >
+        {loading ? (
+          <>
+            <div className="animate-spin rounded-full h-4 w-4 border-b-2 border-white mr-2"></div>
+            Suppression...
+          </>
+        ) : (
+          <>
+            <Trash2 className="w-4 h-4 mr-2" />
+            Tout effacer
+          </>
+        )}
+      </Button>
+    </>
+  );
+
+  return (
+    <BaseModal
+      isOpen={isOpen}
+      onClose={handleClose}
+      title="Effacer toutes les propositions"
+      description={`Cette action supprimera définitivement toutes les propositions de la campagne.${campaignTitle ? ` Campagne : ${campaignTitle}` : ''}`}
+      footer={footer}
+      maxWidth="sm:max-w-md"
+    >
+      <ErrorDisplay error={error} />
+
+      <Alert className="border-red-200 bg-red-50 dark:bg-red-900/20 dark:border-red-800">
+        <AlertTriangle className="h-4 w-4 text-red-600 dark:text-red-400" />
+        <AlertDescription className="text-red-800 dark:text-red-200">
+          <strong>Attention :</strong> Cette action est irréversible. 
+          {propositionCount > 0 && (
+            <>
+              {' '}Vous êtes sur le point de supprimer <strong>{propositionCount} proposition{propositionCount > 1 ? 's' : ''}</strong>.
+            </>
+          )}
+        </AlertDescription>
+      </Alert>
+
+      <div className="mt-4 p-4 bg-slate-50 dark:bg-slate-800 rounded-lg">
+        <h4 className="font-medium text-slate-900 dark:text-slate-100 mb-2">
+          Que sera supprimé :
+        </h4>
+        <ul className="text-sm text-slate-600 dark:text-slate-300 space-y-1">
+          <li>• Toutes les propositions de la campagne</li>
+          <li>• Les titres et descriptions des propositions</li>
+          <li>• Les informations des auteurs (noms, emails)</li>
+          <li>• Toutes les données associées</li>
+        </ul>
+      </div>
+
+      <div className="mt-4 p-4 bg-blue-50 dark:bg-blue-900/20 rounded-lg">
+        <h4 className="font-medium text-blue-900 dark:text-blue-100 mb-2">
+          Ce qui sera conservé :
+        </h4>
+        <ul className="text-sm text-blue-800 dark:text-blue-200 space-y-1">
+          <li>• La campagne elle-même</li>
+          <li>• Les participants</li>
+          <li>• Les votes déjà effectués</li>
+          <li>• Les paramètres de la campagne</li>
+        </ul>
+      </div>
+    </BaseModal>
+  );
+}
diff --git a/src/components/ExportFileFormatSelect.tsx b/src/components/ExportFileFormatSelect.tsx
new file mode 100644
index 0000000..f7b4692
--- /dev/null
+++ b/src/components/ExportFileFormatSelect.tsx
@@ -0,0 +1,46 @@
+'use client';
+
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+import { Label } from '@/components/ui/label';
+
+export type ExportFileFormat = 'ods' | 'csv' | 'xls';
+
+interface ExportFileFormatSelectProps {
+  value: ExportFileFormat;
+  onValueChange: (value: ExportFileFormat) => void;
+  disabled?: boolean;
+}
+
+export function ExportFileFormatSelect({ 
+  value, 
+  onValueChange, 
+  disabled = false 
+}: ExportFileFormatSelectProps) {
+  return (
+    <div className="space-y-2">
+      <Label htmlFor="export-file-format">Format de fichier d'export</Label>
+      <Select value={value} onValueChange={onValueChange} disabled={disabled}>
+        <SelectTrigger id="export-file-format" className="w-full">
+          <SelectValue placeholder="Sélectionner un format" />
+        </SelectTrigger>
+        <SelectContent>
+          <SelectItem value="ods" className="flex flex-col items-start py-3">
+            <span className="font-medium">ODS (OpenDocument)</span>
+            <span className="text-sm text-slate-500">Recommandé - Libre et compatible</span>
+          </SelectItem>
+          <SelectItem value="csv" className="flex flex-col items-start py-3">
+            <span className="font-medium">CSV (Valeurs séparées par des virgules)</span>
+            <span className="text-sm text-slate-500">Universel - Compatible avec tous les tableurs</span>
+          </SelectItem>
+          <SelectItem value="xls" className="flex flex-col items-start py-3">
+            <span className="font-medium">XLS (Microsoft Office)</span>
+            <span className="text-sm text-slate-500">Propriétaire - Compatible Excel</span>
+          </SelectItem>
+        </SelectContent>
+      </Select>
+      <p className="text-sm text-slate-600 dark:text-slate-400">
+        Le format ODS est recommandé car il est libre, ouvert et compatible avec la plupart des tableurs.
+      </p>
+    </div>
+  );
+}
diff --git a/src/components/ExportPropositionsButton.tsx b/src/components/ExportPropositionsButton.tsx
new file mode 100644
index 0000000..2d01098
--- /dev/null
+++ b/src/components/ExportPropositionsButton.tsx
@@ -0,0 +1,59 @@
+'use client';
+
+import { useState } from 'react';
+import { Button } from '@/components/ui/button';
+import { Download } from 'lucide-react';
+import { Proposition } from '@/types';
+import { generatePropositionsExport, downloadExportFile, formatPropositionsFilename } from '@/lib/export-utils';
+
+interface ExportPropositionsButtonProps {
+  propositions: Proposition[];
+  campaignTitle: string;
+  disabled?: boolean;
+}
+
+export default function ExportPropositionsButton({ 
+  propositions, 
+  campaignTitle, 
+  disabled = false 
+}: ExportPropositionsButtonProps) {
+  const [isExporting, setIsExporting] = useState(false);
+
+  const handleExport = async () => {
+    if (propositions.length === 0) {
+      alert('Aucune proposition à exporter.');
+      return;
+    }
+
+    setIsExporting(true);
+    
+    try {
+      // Générer le fichier dans le format configuré
+      const { data, format } = await generatePropositionsExport(propositions, campaignTitle);
+      
+      // Créer le nom de fichier avec l'extension appropriée
+      const filename = formatPropositionsFilename(campaignTitle, format);
+      
+      // Télécharger le fichier
+      downloadExportFile(data, filename, format);
+      
+    } catch (error) {
+      console.error('Erreur lors de l\'export des propositions:', error);
+      alert('Erreur lors de l\'export des propositions. Veuillez réessayer.');
+    } finally {
+      setIsExporting(false);
+    }
+  };
+
+  return (
+    <Button 
+      variant="outline" 
+      onClick={handleExport}
+      disabled={disabled || isExporting || propositions.length === 0}
+      className="flex items-center gap-2"
+    >
+      <Download className="w-4 h-4" />
+      {isExporting ? 'Export en cours...' : 'Exporter'}
+    </Button>
+  );
+}
diff --git a/src/components/ExportStatsButton.tsx b/src/components/ExportStatsButton.tsx
index ba92c57..b8b68b1 100644
--- a/src/components/ExportStatsButton.tsx
+++ b/src/components/ExportStatsButton.tsx
@@ -3,7 +3,7 @@
 import { useState } from 'react';
 import { Button } from '@/components/ui/button';
 import { Download, FileSpreadsheet } from 'lucide-react';
-import { generateVoteExportODS, downloadODS, formatFilename, ExportData, AnonymizationLevel } from '@/lib/export-utils';
+import { generateVoteExport, downloadExportFile, formatFilename, ExportData, AnonymizationLevel } from '@/lib/export-utils';
 import { settingsService } from '@/lib/services';
 
 interface ExportStatsButtonProps {
@@ -46,10 +46,10 @@ export function ExportStatsButton({
         anonymizationLevel
       };
 
-      const odsData = generateVoteExportODS(exportData);
-      const filename = formatFilename(campaignTitle);
+      const { data, format } = await generateVoteExport(exportData);
+      const filename = formatFilename(campaignTitle, format);
       
-      downloadODS(odsData, filename);
+      downloadExportFile(data, filename, format);
     } catch (error) {
       console.error('Erreur lors de l\'export:', error);
       // Ici on pourrait ajouter une notification d'erreur
@@ -75,7 +75,7 @@ export function ExportStatsButton({
       ) : (
         <>
           <FileSpreadsheet className="h-4 w-4" />
-          Exporter les votes (ODS)
+          Exporter les votes
         </>
       )}
     </Button>
diff --git a/src/components/ImportFileModal.tsx b/src/components/ImportFileModal.tsx
index 0296649..64f56e5 100644
--- a/src/components/ImportFileModal.tsx
+++ b/src/components/ImportFileModal.tsx
@@ -121,7 +121,7 @@ export default function ImportFileModal({
             Téléchargez le modèle
           </span>
         </div>
-        <Button variant="outline" size="sm" onClick={() => downloadTemplate(type)}>
+        <Button variant="outline" size="sm" onClick={async () => await downloadTemplate(type)}>
           <Download className="w-4 h-4 mr-1" />
           Modèle
         </Button>
@@ -158,7 +158,7 @@ export default function ImportFileModal({
               <table className="w-full text-sm table-fixed">
                 <thead className="bg-slate-50 dark:bg-slate-800">
                   <tr>
-                    {Object.keys(preview[0] || {}).map((header) => (
+                    {getExpectedColumns(type).map((header) => (
                       <th key={header} className="px-2 py-1 text-left font-medium truncate">
                         {header}
                       </th>
@@ -168,9 +168,9 @@ export default function ImportFileModal({
                 <tbody>
                   {preview.map((row, index) => (
                     <tr key={index} className="border-t">
-                      {Object.values(row).map((value, cellIndex) => (
-                        <td key={cellIndex} className="px-2 py-1 text-xs truncate">
-                          {String(value)}
+                      {getExpectedColumns(type).map((header) => (
+                        <td key={header} className="px-2 py-1 text-xs truncate">
+                          {String(row[header] || '')}
                         </td>
                       ))}
                     </tr>
diff --git a/src/components/ShareModal.tsx b/src/components/ShareModal.tsx
new file mode 100644
index 0000000..f764993
--- /dev/null
+++ b/src/components/ShareModal.tsx
@@ -0,0 +1,221 @@
+import { useEffect, useRef, useState } from 'react';
+import QRCode from 'qrcode';
+import { BaseModal } from './base/BaseModal';
+import { Button } from './ui/button';
+import { Copy, Check, Share2 } from 'lucide-react';
+
+interface ShareModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  campaignTitle: string;
+  depositUrl: string;
+}
+
+export default function ShareModal({ 
+  isOpen, 
+  onClose, 
+  campaignTitle, 
+  depositUrl 
+}: ShareModalProps) {
+  const canvasRef = useRef<HTMLCanvasElement>(null);
+  const [copied, setCopied] = useState(false);
+  const [qrCodeError, setQrCodeError] = useState<string | null>(null);
+  const [qrCodeLoading, setQrCodeLoading] = useState(false);
+  const [qrCodeDataUrl, setQrCodeDataUrl] = useState<string | null>(null);
+
+  useEffect(() => {
+    if (isOpen && depositUrl) {
+      setQrCodeLoading(true);
+      setQrCodeError(null);
+      setQrCodeDataUrl(null);
+
+      // Essayer d'abord de générer en tant que Data URL
+      QRCode.toDataURL(depositUrl, {
+        width: 300,
+        margin: 2,
+        color: {
+          dark: '#000000',
+          light: '#FFFFFF'
+        },
+        errorCorrectionLevel: 'M'
+      }).then((dataUrl) => {
+        console.log('QR code généré avec succès (DataURL) pour:', depositUrl);
+        setQrCodeDataUrl(dataUrl);
+        setQrCodeLoading(false);
+      }).catch((err) => {
+        console.error('Erreur lors de la génération du QR code (DataURL):', err);
+        
+        // Fallback: essayer avec le canvas
+        if (canvasRef.current) {
+          const canvas = canvasRef.current;
+          const ctx = canvas.getContext('2d');
+          if (ctx) {
+            ctx.clearRect(0, 0, canvas.width, canvas.height);
+          }
+
+          QRCode.toCanvas(canvas, depositUrl, {
+            width: 300,
+            margin: 2,
+            color: {
+              dark: '#000000',
+              light: '#FFFFFF'
+            },
+            errorCorrectionLevel: 'M'
+          }).then(() => {
+            console.log('QR code généré avec succès (Canvas) pour:', depositUrl);
+            setQrCodeLoading(false);
+          }).catch((canvasErr) => {
+            console.error('Erreur lors de la génération du QR code (Canvas):', canvasErr);
+            setQrCodeError('Erreur lors de la génération du QR code');
+            setQrCodeLoading(false);
+          });
+        } else {
+          setQrCodeError('Erreur lors de la génération du QR code');
+          setQrCodeLoading(false);
+        }
+      });
+    }
+  }, [isOpen, depositUrl]);
+
+  const handleCopyLink = async () => {
+    try {
+      await navigator.clipboard.writeText(depositUrl);
+      setCopied(true);
+      setTimeout(() => setCopied(false), 2000);
+    } catch (err) {
+      console.error('Erreur lors de la copie:', err);
+    }
+  };
+
+  const retryQrCode = () => {
+    if (depositUrl) {
+      setQrCodeLoading(true);
+      setQrCodeError(null);
+      setQrCodeDataUrl(null);
+
+      QRCode.toDataURL(depositUrl, {
+        width: 300,
+        margin: 2,
+        color: {
+          dark: '#000000',
+          light: '#FFFFFF'
+        },
+        errorCorrectionLevel: 'M'
+      }).then((dataUrl) => {
+        setQrCodeDataUrl(dataUrl);
+        setQrCodeLoading(false);
+      }).catch((err) => {
+        console.error('Erreur lors de la génération du QR code:', err);
+        setQrCodeError('Erreur lors de la génération du QR code');
+        setQrCodeLoading(false);
+      });
+    }
+  };
+
+  return (
+    <BaseModal
+      isOpen={isOpen}
+      onClose={onClose}
+      title={
+        <div className="flex items-center gap-2">
+          <Share2 className="w-5 h-5 text-blue-600" />
+          Partager le lien de dépôt
+        </div>
+      }
+      description={`Pour partager le lien de dépôt public de propositions pour la campagne "${campaignTitle}"`}
+      maxWidth="sm:max-w-[600px]"
+      maxHeight="max-h-[90vh]"
+    >
+      <div className="space-y-6">
+        {/* Lien de dépôt */}
+        <div className="space-y-3">
+          <h3 className="text-lg font-semibold text-slate-900 dark:text-slate-100">
+            Lien de dépôt public
+          </h3>
+          <div className="flex items-center gap-2 p-3 bg-slate-50 dark:bg-slate-800 rounded-lg border border-slate-200 dark:border-slate-700">
+            <div className="flex-1 text-sm font-mono text-slate-700 dark:text-slate-300 break-all">
+              {depositUrl}
+            </div>
+            <Button
+              variant="outline"
+              size="sm"
+              onClick={handleCopyLink}
+              className="shrink-0"
+            >
+              {copied ? (
+                <>
+                  <Check className="w-4 h-4 mr-2" />
+                  Copié !
+                </>
+              ) : (
+                <>
+                  <Copy className="w-4 h-4 mr-2" />
+                  Copier
+                </>
+              )}
+            </Button>
+          </div>
+        </div>
+
+        {/* QR Code */}
+        <div className="space-y-3">
+          <h3 className="text-lg font-semibold text-slate-900 dark:text-slate-100">
+            QR Code
+          </h3>
+          <div className="flex justify-center p-6 bg-white dark:bg-slate-900 rounded-lg border border-slate-200 dark:border-slate-700">
+            {qrCodeLoading && (
+              <div className="flex items-center justify-center w-[300px] h-[300px]">
+                <div className="text-slate-500">Génération du QR code...</div>
+              </div>
+            )}
+            {qrCodeError && (
+              <div className="flex items-center justify-center w-[300px] h-[300px]">
+                <div className="text-red-500 text-center">
+                  <div className="text-sm">{qrCodeError}</div>
+                  <Button 
+                    variant="outline" 
+                    size="sm" 
+                    className="mt-2"
+                    onClick={retryQrCode}
+                  >
+                    Réessayer
+                  </Button>
+                </div>
+              </div>
+            )}
+            {qrCodeDataUrl && !qrCodeLoading && !qrCodeError && (
+              <img 
+                src={qrCodeDataUrl}
+                alt="QR Code pour le lien de dépôt"
+                className="border border-slate-200 dark:border-slate-600 rounded-lg"
+                width={300}
+                height={300}
+              />
+            )}
+            <canvas 
+              ref={canvasRef}
+              width={300}
+              height={300}
+              className={`border border-slate-200 dark:border-slate-600 rounded-lg ${qrCodeDataUrl || qrCodeLoading || qrCodeError ? 'hidden' : 'block'}`}
+            />
+          </div>
+          <p className="text-sm text-slate-600 dark:text-slate-400 text-center">
+            Scannez ce QR code pour accéder directement au formulaire de dépôt
+          </p>
+        </div>
+
+        {/* Instructions */}
+        <div className="p-4 bg-blue-50 dark:bg-blue-900/20 border border-blue-200 dark:border-blue-800 rounded-lg">
+          <h4 className="font-medium text-blue-900 dark:text-blue-100 mb-2">
+            Comment partager ?
+          </h4>
+          <ul className="text-sm text-blue-800 dark:text-blue-200 space-y-1">
+            <li>• Copiez le lien ci-dessus pour le partager par email, SMS ou message</li>
+            <li>• Imprimez ou affichez le QR code pour un accès rapide</li>
+            <li>• Partagez l'image du QR code sur les réseaux sociaux</li>
+          </ul>
+        </div>
+      </div>
+    </BaseModal>
+  );
+}
\ No newline at end of file
diff --git a/src/lib/export-utils.ts b/src/lib/export-utils.ts
index 29914b2..02d79c4 100644
--- a/src/lib/export-utils.ts
+++ b/src/lib/export-utils.ts
@@ -1,5 +1,21 @@
 import * as XLSX from 'xlsx';
 import { Proposition, Participant, Vote } from '@/types';
+import { settingsService } from './services';
+
+export type ExportFileFormat = 'ods' | 'csv' | 'xls';
+
+/**
+ * Obtient le format de fichier d'export configuré dans les paramètres
+ */
+export async function getExportFileFormat(): Promise<ExportFileFormat> {
+  try {
+    const format = await settingsService.getStringValue('export_file_format', 'ods');
+    return format as ExportFileFormat;
+  } catch (error) {
+    console.error('Erreur lors de la récupération du format d\'export:', error);
+    return 'ods'; // Format par défaut
+  }
+}
 
 export interface ExportData {
   campaignTitle: string;
@@ -25,6 +41,73 @@ export interface PropositionStats {
   consensusScore: number;
 }
 
+export async function generateVoteExport(data: ExportData): Promise<{ data: Uint8Array | string; format: ExportFileFormat }> {
+  const format = await getExportFileFormat();
+  
+  // Créer la matrice de données
+  const matrix: (string | number)[][] = [];
+  
+  // Pour les formats Excel/ODS, ajouter un titre
+  if (format !== 'csv') {
+    matrix.push([`Statistiques de vote - ${data.campaignTitle}`]);
+    matrix.push([]); // Ligne vide
+  }
+  
+  // En-têtes des colonnes : propositions + total
+  const headers = ['Participant', ...data.propositions.map(p => p.title), 'Total voté', 'Budget restant'];
+  matrix.push(headers);
+  
+  // Données des participants
+  data.participants.forEach(participant => {
+    const row: (string | number)[] = [];
+    
+    // Nom du participant (avec anonymisation)
+    const participantName = anonymizeParticipantName(participant, data.anonymizationLevel || 'full');
+    row.push(participantName);
+    
+    // Votes pour chaque proposition
+    let totalVoted = 0;
+    data.propositions.forEach(proposition => {
+      const vote = data.votes.find(v => 
+        v.participant_id === participant.id && 
+        v.proposition_id === proposition.id
+      );
+      const amount = vote ? vote.amount : 0;
+      row.push(amount);
+      totalVoted += amount;
+    });
+    
+    // Total voté par le participant
+    row.push(totalVoted);
+    
+    // Budget restant
+    const budgetRemaining = data.budgetPerUser - totalVoted;
+    row.push(budgetRemaining);
+    
+    matrix.push(row);
+  });
+  
+  // Ligne des totaux
+  const totalRow: (string | number)[] = ['TOTAL'];
+  let grandTotal = 0;
+  
+  data.propositions.forEach(proposition => {
+    const propositionTotal = data.votes
+      .filter(v => v.proposition_id === proposition.id)
+      .reduce((sum, vote) => sum + vote.amount, 0);
+    totalRow.push(propositionTotal);
+    grandTotal += propositionTotal;
+  });
+  
+  totalRow.push(grandTotal);
+  totalRow.push(data.participants.length * data.budgetPerUser - grandTotal);
+  matrix.push(totalRow);
+  
+  const exportData = generateExportFile(matrix, format);
+  return { data: exportData, format };
+}
+
+// Fonction de compatibilité (à supprimer plus tard)
 export function generateVoteExportODS(data: ExportData): Uint8Array {
   const { campaignTitle, propositions, participants, votes, budgetPerUser, propositionStats, anonymizationLevel = 'full' } = data;
 
@@ -248,6 +331,66 @@ export function generateVoteExportODS(data: ExportData): Uint8Array {
   return new Uint8Array(odsBuffer);
 }
 
+/**
+ * Génère un fichier d'export dans le format spécifié
+ */
+export function generateExportFile(matrix: (string | number)[][], format: ExportFileFormat): Uint8Array | string {
+  if (format === 'csv') {
+    // Générer du CSV
+    return matrix.map(row => 
+      row.map(cell => {
+        const cellStr = String(cell || '');
+        // Échapper les guillemets et entourer de guillemets si nécessaire
+        if (cellStr.includes(',') || cellStr.includes('"') || cellStr.includes('\n')) {
+          return `"${cellStr.replace(/"/g, '""')}"`;
+        }
+        return cellStr;
+      }).join(',')
+    ).join('\n');
+  } else {
+    // Générer un fichier Excel/ODS
+    const workbook = XLSX.utils.book_new();
+    const worksheet = XLSX.utils.aoa_to_sheet(matrix);
+    XLSX.utils.book_append_sheet(workbook, worksheet, 'Données');
+    
+    const buffer = XLSX.write(workbook, { 
+      bookType: format, 
+      type: 'array' 
+    });
+    
+    return new Uint8Array(buffer);
+  }
+}
+
+/**
+ * Télécharge un fichier d'export
+ */
+export function downloadExportFile(data: Uint8Array | string, filename: string, format: ExportFileFormat): void {
+  let blob: Blob;
+  let mimeType: string;
+  
+  if (format === 'csv') {
+    mimeType = 'text/csv;charset=utf-8';
+    blob = new Blob([data as string], { type: mimeType });
+  } else {
+    mimeType = format === 'ods' 
+      ? 'application/vnd.oasis.opendocument.spreadsheet'
+      : 'application/vnd.ms-excel';
+    blob = new Blob([data as Uint8Array], { type: mimeType });
+  }
+  
+  const url = URL.createObjectURL(blob);
+  const link = document.createElement('a');
+  link.href = url;
+  link.download = filename;
+  
+  document.body.appendChild(link);
+  link.click();
+  document.body.removeChild(link);
+  
+  URL.revokeObjectURL(url);
+}
+
 export function downloadODS(data: Uint8Array, filename: string): void {
   const blob = new Blob([data], { 
     type: 'application/vnd.oasis.opendocument.spreadsheet' 
@@ -280,7 +423,145 @@ export function anonymizeParticipantName(participant: Participant, level: Anonym
   }
 }
 
-export function formatFilename(campaignTitle: string): string {
+/**
+ * Anonymise le nom d'un auteur de proposition
+ */
+export function anonymizeAuthorName(name: string, level: AnonymizationLevel): string {
+  switch (level) {
+    case 'full':
+      return 'XXXX';
+    case 'initials':
+      return name.charAt(0).toUpperCase() + '.';
+    case 'none':
+      return name;
+    default:
+      return 'XXXX';
+  }
+}
+
+/**
+ * Anonymise l'email d'un auteur de proposition
+ */
+export function anonymizeAuthorEmail(email: string, level: AnonymizationLevel): string {
+  switch (level) {
+    case 'full':
+      return 'xxxx@xxxx.xxx';
+    case 'initials':
+      // Garder le domaine mais anonymiser la partie locale
+      const [localPart, domain] = email.split('@');
+      if (domain) {
+        return `${localPart.charAt(0)}***@${domain}`;
+      }
+      return 'x***@xxxx.xxx';
+    case 'none':
+      return email;
+    default:
+      return 'xxxx@xxxx.xxx';
+  }
+}
+
+export async function generatePropositionsExport(propositions: Proposition[], campaignTitle: string): Promise<{ data: Uint8Array | string; format: ExportFileFormat }> {
+  const format = await getExportFileFormat();
+  const anonymizationLevel = await settingsService.getStringValue('export_anonymization', 'full') as AnonymizationLevel;
+  
+  // Créer la matrice de données
+  const matrix: (string | number)[][] = [];
+
+  // Pour les formats Excel/ODS, ajouter un titre
+  if (format !== 'csv') {
+    matrix.push([`Liste des propositions - ${campaignTitle}`]);
+    matrix.push([]); // Ligne vide
+  }
+
+  // En-têtes des colonnes (en français)
+  const headers = ['Titre', 'Description', 'Prénom', 'Nom', 'Email'];
+  matrix.push(headers);
+
+  // Données des propositions avec anonymisation
+  propositions.forEach(proposition => {
+    const row: (string | number)[] = [
+      proposition.title,
+      proposition.description,
+      anonymizeAuthorName(proposition.author_first_name, anonymizationLevel),
+      anonymizeAuthorName(proposition.author_last_name, anonymizationLevel),
+      anonymizeAuthorEmail(proposition.author_email, anonymizationLevel)
+    ];
+    matrix.push(row);
+  });
+
+  const data = generateExportFile(matrix, format);
+  return { data, format };
+}
+
+// Fonction de compatibilité (à supprimer plus tard)
+export function generatePropositionsExportODS(propositions: Proposition[], campaignTitle: string): Uint8Array {
+  // Créer la matrice de données
+  const matrix: (string | number)[][] = [];
+
+  // En-têtes : Titre de la campagne
+  matrix.push([`Liste des propositions - ${campaignTitle}`]);
+  matrix.push([]); // Ligne vide
+
+  // En-têtes des colonnes (en français)
+  const headers = ['Titre', 'Description', 'Prénom', 'Nom', 'Email'];
+  matrix.push(headers);
+
+  // Données des propositions (sans anonymisation pour la compatibilité - utiliser la nouvelle fonction)
+  propositions.forEach(proposition => {
+    const row: (string | number)[] = [
+      proposition.title,
+      proposition.description,
+      proposition.author_first_name,
+      proposition.author_last_name,
+      proposition.author_email
+    ];
+    matrix.push(row);
+  });
+
+  // Créer le workbook et worksheet
+  const workbook = XLSX.utils.book_new();
+  const worksheet = XLSX.utils.aoa_to_sheet(matrix);
+
+  // Ajouter des styles pour les colonnes
+  worksheet['!cols'] = [
+    { width: 30 }, // Titre
+    { width: 50 }, // Description
+    { width: 15 }, // Prénom
+    { width: 15 }, // Nom
+    { width: 25 }, // Email
+    { width: 15 }  // Date de création
+  ];
+
+  // Style pour les en-têtes (texte en gras)
+  for (let col = 0; col < headers.length; col++) {
+    const cellRef = XLSX.utils.encode_cell({ r: 2, c: col }); // Ligne 3 (index 2) pour les en-têtes
+    if (!worksheet[cellRef]) {
+      worksheet[cellRef] = { v: matrix[2][col] };
+    }
+    worksheet[cellRef].s = {
+      font: { bold: true },
+      border: {
+        top: { style: 'thick' },
+        bottom: { style: 'thick' },
+        left: { style: 'thin' },
+        right: { style: 'thin' }
+      }
+    };
+  }
+
+  // Ajouter le worksheet au workbook
+  XLSX.utils.book_append_sheet(workbook, worksheet, 'Propositions');
+
+  // Générer le fichier ODS
+  const odsBuffer = XLSX.write(workbook, { 
+    bookType: 'ods', 
+    type: 'array' 
+  });
+
+  return new Uint8Array(odsBuffer);
+}
+
+export function formatFilename(campaignTitle: string, format: ExportFileFormat = 'ods'): string {
   const sanitizedTitle = campaignTitle
     .replace(/[^a-zA-Z0-9\s]/g, '')
     .replace(/\s+/g, '_')
@@ -290,7 +571,23 @@ export function formatFilename(campaignTitle: string): string {
   
   const date = new Date().toISOString().split('T')[0];
   const prefix = sanitizedTitle ? `statistiques_vote_${sanitizedTitle}_` : 'statistiques_vote_';
-  const filename = `${prefix}${date}.ods`;
+  const filename = `${prefix}${date}.${format}`;
+  
+  // Nettoyer les underscores multiples à la fin
+  return filename.replace(/_+/g, '_');
+}
+
+export function formatPropositionsFilename(campaignTitle: string, format: ExportFileFormat = 'ods'): string {
+  const sanitizedTitle = campaignTitle
+    .replace(/[^a-zA-Z0-9\s]/g, '')
+    .replace(/\s+/g, '_')
+    .replace(/_+/g, '_') // Remplacer les underscores multiples par un seul
+    .toLowerCase()
+    .trim();
+  
+  const date = new Date().toISOString().split('T')[0];
+  const prefix = sanitizedTitle ? `propositions_${sanitizedTitle}_` : 'propositions_';
+  const filename = `${prefix}${date}.${format}`;
   
   // Nettoyer les underscores multiples à la fin
   return filename.replace(/_+/g, '_');
diff --git a/src/lib/file-utils.ts b/src/lib/file-utils.ts
index f4f7375..d964755 100644
--- a/src/lib/file-utils.ts
+++ b/src/lib/file-utils.ts
@@ -23,15 +23,34 @@ export function parseCSV(file: File): Promise<ParsedFileData> {
           return;
         }
 
-        const headers = lines[0].split(',').map(h => h.trim().replace(/"/g, ''));
-        const data = lines.slice(1).map(line => {
-          const values = line.split(',').map(v => v.trim().replace(/"/g, ''));
-          const row: any = {};
-          headers.forEach((header, index) => {
-            row[header] = values[index] || '';
+        // Trouver la ligne d'en-têtes (ignorer les lignes de titre et vides)
+        let headerLineIndex = 0;
+        for (let i = 0; i < lines.length; i++) {
+          const line = lines[i].trim();
+          // Si la ligne contient des virgules et ressemble à des en-têtes
+          if (line.includes(',') && !line.toLowerCase().includes('modèle') && !line.toLowerCase().includes('liste')) {
+            headerLineIndex = i;
+            break;
+          }
+        }
+
+        const headers = lines[headerLineIndex].split(',').map(h => h.trim().replace(/"/g, ''));
+        const dataLines = lines.slice(headerLineIndex + 1);
+        
+        const data = dataLines
+          .filter(line => line.trim()) // Ignorer les lignes vides
+          .map(line => {
+            const values = line.split(',').map(v => v.trim().replace(/"/g, ''));
+            const row: any = {};
+            headers.forEach((header, index) => {
+              row[header] = values[index] || '';
+            });
+            return row;
+          })
+          .filter(row => {
+            // Ignorer les lignes où tous les champs sont vides
+            return Object.values(row).some(value => value && value.toString().trim());
           });
-          return row;
-        });
 
         resolve({ data, headers });
       } catch (error) {
@@ -62,16 +81,39 @@ export function parseExcel(file: File): Promise<ParsedFileData> {
           return;
         }
 
-        const headers = jsonData[0] as string[];
-        const rows = jsonData.slice(1) as any[][];
+        // Trouver la ligne d'en-têtes (ignorer les lignes de titre et vides)
+        let headerLineIndex = 0;
+        for (let i = 0; i < jsonData.length; i++) {
+          const row = jsonData[i] as any[];
+          if (row && row.length > 0) {
+            const firstCell = row[0];
+            // Si la première cellule ressemble à un en-tête et pas à un titre
+            if (firstCell && typeof firstCell === 'string' && 
+                !firstCell.toLowerCase().includes('modèle') && 
+                !firstCell.toLowerCase().includes('liste') &&
+                !firstCell.toLowerCase().includes('propositions')) {
+              headerLineIndex = i;
+              break;
+            }
+          }
+        }
+
+        const headers = (jsonData[headerLineIndex] as string[]).filter(h => h && h.toString().trim());
+        const rows = jsonData.slice(headerLineIndex + 1) as any[][];
         
-        const parsedData = rows.map(row => {
-          const rowData: any = {};
-          headers.forEach((header, index) => {
-            rowData[header] = row[index] || '';
+        const parsedData = rows
+          .filter(row => row && row.length > 0) // Ignorer les lignes vides
+          .map(row => {
+            const rowData: any = {};
+            headers.forEach((header, index) => {
+              rowData[header] = row[index] || '';
+            });
+            return rowData;
+          })
+          .filter(rowData => {
+            // Ignorer les lignes où tous les champs sont vides
+            return Object.values(rowData).some(value => value && value.toString().trim());
           });
-          return rowData;
-        });
 
         resolve({ data: parsedData, headers });
       } catch (error) {
@@ -84,22 +126,47 @@ export function parseExcel(file: File): Promise<ParsedFileData> {
 
 export function getExpectedColumns(type: 'propositions' | 'participants'): string[] {
   if (type === 'propositions') {
-    return ['title', 'description', 'author_first_name', 'author_last_name', 'author_email'];
+    return ['Titre', 'Description', 'Prénom', 'Nom', 'Email'];
   } else {
-    return ['first_name', 'last_name', 'email'];
+    return ['Prénom', 'Nom', 'Email'];
   }
 }
 
-export function downloadTemplate(type: 'propositions' | 'participants'): void {
+export async function downloadTemplate(type: 'propositions' | 'participants'): Promise<void> {
   const columns = getExpectedColumns(type);
-  const csvContent = columns.join(',') + '\n';
-  const blob = new Blob([csvContent], { type: 'text/csv' });
-  const url = window.URL.createObjectURL(blob);
-  const a = document.createElement('a');
-  a.href = url;
-  a.download = `template_${type}.csv`;
-  a.click();
-  window.URL.revokeObjectURL(url);
+  
+  // Importer dynamiquement la fonction pour éviter les dépendances circulaires
+  const { getExportFileFormat, generateExportFile, downloadExportFile } = await import('./export-utils');
+  const format = await getExportFileFormat();
+  
+  // Créer la matrice de données avec les en-têtes
+  const matrix: string[][] = [];
+  
+  // Pour les formats Excel/ODS, ajouter un titre
+  if (format !== 'csv') {
+    matrix.push([`Modèle d'import - ${type === 'propositions' ? 'Propositions' : 'Participants'}`]);
+    matrix.push([]); // Ligne vide
+  }
+  
+  matrix.push(columns); // En-têtes des colonnes
+  
+  // Ajouter quelques lignes d'exemple
+  if (type === 'propositions') {
+    matrix.push(['Exemple de proposition', 'Description de la proposition', 'Jean', 'Dupont', 'jean.dupont@example.com']);
+    matrix.push(['Autre proposition', 'Autre description', 'Marie', 'Martin', 'marie.martin@example.com']);
+  } else {
+    matrix.push(['Jean', 'Dupont', 'jean.dupont@example.com']);
+    matrix.push(['Marie', 'Martin', 'marie.martin@example.com']);
+  }
+  
+  // Générer le fichier dans le format configuré
+  const data = generateExportFile(matrix, format);
+  
+  // Créer le nom de fichier avec l'extension appropriée
+  const filename = `template_${type}.${format}`;
+  
+  // Télécharger le fichier
+  downloadExportFile(data, filename, format);
 }
 
 export function validateFileType(file: File): { isValid: boolean; error?: string } {
diff --git a/src/lib/services.ts b/src/lib/services.ts
index 047b254..988ad43 100644
--- a/src/lib/services.ts
+++ b/src/lib/services.ts
@@ -276,6 +276,15 @@ export const propositionService = {
       .delete()
       .eq('id', id);
     
+    if (error) throw error;
+  },
+
+  async deleteAllByCampaign(campaignId: string): Promise<void> {
+    const { error } = await supabase
+      .from('propositions')
+      .delete()
+      .eq('campaign_id', campaignId);
+    
     if (error) throw error;
   }
 };
@@ -363,6 +372,15 @@ export const participantService = {
     if (error) throw error;
   },
 
+  async deleteAllByCampaign(campaignId: string): Promise<void> {
+    const { error } = await supabase
+      .from('participants')
+      .delete()
+      .eq('campaign_id', campaignId);
+    
+    if (error) throw error;
+  },
+
   // Nouvelle méthode pour récupérer un participant par short_id
   async getByShortId(shortId: string): Promise<Participant | null> {
     const { data, error } = await supabase