Safari 17+: Image file got automatically converted to HEIC extension

Issue: The image file mime type got converted to HEIC by Safari

To reproduce:

• Create an HTML file with <input type="file" accept="image/*,image/heic" />
• Try to upload a photo with .jpeg or .png
• Print out the file object
• The file name would be changed to some temporary name with .heic extension

Expected:

• The conversion should not happen after adding the image/heic to the accept mime type.
• The accept mine type with image/heic should be allowed and cannot be removed for other modern browsers which do not support .heic. Otherwise, the system browse dialog would disable .heic type.

Other findings:

• If image/heic is removed from the accept mime type, the file object would be printed out as its original extension.
• It only happens with Safari 17+.

Original file object:

File: {
    lastModified: 1702417372000,
    name: "leo2.jpeg",
    size: 170584,
    type: "image/jepg",
    webkitRelativePath: ""
}

Converted file object:

File: {
    lastModified: 1702417636000,
    name: "tempImageHjyd3l.heic",
    size: 170429,
    type: "image/heic",
    webkitRelativePath: ""
}