Add support for 'personal notes' on posts

[NateDhaliwal]

Seems very possible with a Theme Component. Just a button at the bottom that links to a new PM. To do that, have a read of this:

Creating pre-filled personal message links

This guide describes how to create a link to start a new personal message with pre-filled information, including best practices. Required user level: All users Discourse allows you to compose a new personal message with pre-filled information via URL parameters. This can save time and ensure consistency for common messages. Structure of the URL To create a new pre-filled message, format your URL like this: https://discourse.example.com/new-message?username…

Then you can prefill the title and the recipient (yourself).