Add "copy file to clipboard" feature

[Dustin Wyatt]

Currently, on the results page, the user can download the text file or copy its contents to the clipboard.

Another useful function would be to copy the text file as a file to the clipboard. When the user pastes this into Claude, ChatGPT, Gemini, and probably others it ends up as an attachment rather than inserted inline.

A completely untested idea of how to do this:

function dataUriToFile(dataUri, filename) {
    const byteString = atob(dataUri.split(',')[1]);
    const mimeString = dataUri.split(',')[0].split(':')[1].split(';')[0];
    const ab = new ArrayBuffer(byteString.length);
    const ia = new Uint8Array(ab);
    for (let i = 0; i < byteString.length; i++) {
        ia[i] = byteString.charCodeAt(i);
    }
    const blob = new Blob([ab], {type: mimeString});
    return new File([blob], filename, {type: mimeString});
}

function copyFileToClipboard(dataUri, filename) {
    const file = dataUriToFile(dataUri, filename);
    navigator.clipboard.write([new ClipboardItem({'application/octet-stream': file})])
        .then(() => console.log("File copied to clipboard!"))
        .catch(err => console.error("Error copying file to clipboard:", err));
}

// Example usage with a data URI and filename
const dataUri = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA...';
const filename = 'example.png';  // Provide a meaningful filename here
copyFileToClipboard(dataUri, filename);