Future Permalink

hi there..

i need some request here for the permalink, hope it acceptable for everyone..

consider to wordpress user that using post url on their image link, i wanna give suggestion to the future permalink algorithm.. just algorithm, not code.. lol.. ’cause i’m not well enough to do it ??

when i set permalink with html as the suffix, like this..
https://example.com/here-is-the-post.html

and then i click the attach under it that goes to..
https://example.com/here-is-the-post.html/attachment-showed-up

so what the need is remove the suffix when attachment on focus, like..
https://example.com/here-is-the-post/attachment-showed-up

even better if the permalink attachment followed by their own extension, as like showed below here..
https://example.com/here-is-the-post/attachment-showed-up.jpg

haha, maybe i just dreaming to have an algorithm like that but if it could possible the it’s awesome.. ??