window.customUploadImage = async function (webpBlob, fileName, token) {
    if (!token) throw new Error('FiveManage token is missing');
    const form = new FormData();
    form.append('file', webpBlob, fileName + '.webp');
    const response = await fetch('https://fmapi.net/api/v2/image', {
        method: 'POST',
        body: form,
        headers: { Authorization: token },
    });
    if (!response.ok) {
        throw new Error('Upload API Error: ' + response.status + ' ' + response.statusText);
    }
    const result = await response.json();
    if (result && result.error) {
        throw new Error('Upload Error: ' + result.error);
    }
    if (!result || !result.data || !result.data.id || !result.data.url) {
        throw new Error('Invalid response: missing id or url');
    }
    return { id: result.data.id, url: result.data.url };
};