Refactor ESLint configuration and update code formatting: Standardize quotes in eslint.config.mjs, next.config.js, and various TypeScript files for consistency. Add Prettier as a dependency and include formatting scripts in package.json. Clean up unnecessary whitespace in multiple files to enhance code readability.

app/api/admin/images/upload/route.ts

@@ -17,7 +17,10 @@ export async function POST(request: Request) {
     const file = formData.get("file") as File;
 
     if (!file) {
-      return NextResponse.json({ error: "Aucun fichier fourni" }, { status: 400 });
+      return NextResponse.json(
+        { error: "Aucun fichier fourni" },
+        { status: 400 }
+      );
     }
 
     // Vérifier le type de fichier
@@ -55,4 +58,3 @@ export async function POST(request: Request) {
     );
   }
 }
-