rajoute le support de l'utilisation de markdown (sur un sous-ensemble) dans la description des campagnes et des propositions

package-lock.json

@@ -19,10 +19,12 @@
         "@radix-ui/react-switch": "^1.2.6",
         "@radix-ui/react-tabs": "^1.1.13",
         "@supabase/supabase-js": "^2.56.0",
+        "@types/dompurify": "^3.0.5",
         "@types/nodemailer": "^7.0.1",
         "@types/xlsx": "^0.0.35",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
+        "dompurify": "^3.2.6",
         "dotenv": "^17.2.1",
         "lucide-react": "^0.541.0",
         "next": "15.5.0",
@@ -3560,6 +3562,15 @@
         "tslib": "^2.4.0"
       }
     },
+    "node_modules/@types/dompurify": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/@types/dompurify/-/dompurify-3.0.5.tgz",
+      "integrity": "sha512-1Wg0g3BtQF7sSb27fJQAKck1HECM6zV1EB66j8JH9i3LCjYabJa0FSdiSgsD5K/RbrsR0SiraKacLB+T8ZVYAg==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/trusted-types": "*"
+      }
+    },
     "node_modules/@types/estree": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
@@ -3626,6 +3637,12 @@
         "@types/react": "^19.0.0"
       }
     },
+    "node_modules/@types/trusted-types": {
+      "version": "2.0.7",
+      "resolved": "https://registry.npmjs.org/@types/trusted-types/-/trusted-types-2.0.7.tgz",
+      "integrity": "sha512-ScaPdn1dQczgbl0QFTeTOmVHFULt394XJgOQNoyVhZ6r2vLnMLJfBPd53SB52T/3G36VI1/g2MZaX0cwDuXsfw==",
+      "license": "MIT"
+    },
     "node_modules/@types/uuid": {
       "version": "9.0.8",
       "resolved": "https://registry.npmjs.org/@types/uuid/-/uuid-9.0.8.tgz",
@@ -4941,6 +4958,15 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/dompurify": {
+      "version": "3.2.6",
+      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.2.6.tgz",
+      "integrity": "sha512-/2GogDQlohXPZe6D6NOgQvXLPSYBqIWMnZ8zzOhn09REE4eyAzb+Hed3jhoM9OkuaJ8P6ZGTTVWQKAi8ieIzfQ==",
+      "license": "(MPL-2.0 OR Apache-2.0)",
+      "optionalDependencies": {
+        "@types/trusted-types": "^2.0.7"
+      }
+    },
     "node_modules/dotenv": {
       "version": "17.2.1",
       "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-17.2.1.tgz",