Request: comments rework

Actual behaviour

I just setup a shared folder for family photo sharing. Immediately i was confronted by my family members with the lag of ability for social interaction, which is possible in the Apple shared albums.
As of now the only way to interact is through:

• Clicking the "more button"
• Click details
• Writeout "@Tom" + message (the only way to produce a notification in the other end)
• The notification on Toms phone is not clickable, so Tom has to:
• Remember the filename
• Find the file
• Click more
• Click details
• See the comment

Expected behaviour

There is a whole lot that can be simplified:

• Show a comment button / indicator in the bottom of each file like in screenshot A
• Make it so comments triggers a push notification for the owner of the file without having to writeout the name (essential). But might have to do with one of the other repos?
• Make the push notification (banner) link to the actual file in question and open the comments
• Dare i say "like button"?

I would be willing to contribute to a developer bounty, but i don't know, if there is a tradition for those in nextcloud?

Screenshots

Reasoning or why should it be changed/implemented?

Would make the app a lot more appealing for non-tech users.
Also might have been mentioned before? (https://github.com/nextcloud/ios/issues/837)

Environment data

iOS version:
14.4.2

Nextcloud iOS app version:
4.0.1.1

Server operating system:
Armbian, Docker Linuxserver image

Web server:
nginx

Database:
MariaDB

Nextcloud version:
21.0.2

The issue does not name files, tests, or an entry point; start by reviewing the existing comments and notification flows in the iOS app, along with the referenced issue #837. Clarify which request is in scope, then verify that file comments are accessible, notifications identify the file and open its comments, and any agreed interaction has coverage.