feat: implement event submission flow with image upload and modal interface

components/dashboard/CreateNewsModal.tsx

@@ -170,10 +170,10 @@ export default function CreateNewsModal({ isOpen, onClose }: CreateNewsModalProp
                       <ImageIcon className="w-10 h-10 text-gray-300 mb-2" />
                     )}
                     <p className="text-sm font-medium text-gray-500">Cliquez pour ajouter une image</p>
-                    <p className="text-xs text-gray-400 mt-1">PNG, JPG jusqu'à 2Mo</p>
+                    <p className="text-xs text-gray-400 mt-1">PNG, JPG, JPEG jusqu'à 5Mo</p>
                     <input 
                       type="file" 
-                      accept="image/*" 
+                      accept="image/png, image/jpeg, image/jpg, image/webp" 
                       onChange={handleImageChange}
                       className="absolute inset-0 opacity-0 cursor-pointer" 
                     />