feat: upgrade vers Next.js 15.4.3 et React 19

- Upgrade Next.js de 14.2.3 vers 15.4.3
- Upgrade React et React DOM vers version 19
- Modification page dynamique [id] pour compatibilité Next.js 15
- Gestion asynchrone des params et searchParams
- Tests de build et développement réussis

package.json

@@ -20,10 +20,10 @@
     "html2canvas": "^1.4.1",
     "jspdf": "^3.0.1",
     "marked": "^16.1.1",
-    "next": "^14.2.3",
+    "next": "15.4.3",
     "next-auth": "^5.0.0-beta.18",
-    "react": "^18.3.1",
-    "react-dom": "^18.3.1",
+    "react": "19",
+    "react-dom": "19",
     "react-virtuoso": "^4.10.2",
     "use-debounce": "^10.0.5"
   },