feat(discord): add song & artist URLs to rich presence

[foxfirecodes]

hey there, dev who implemented the new rich presence fields here :3

this pr adds clickable artist & song links to the rich presence. i looked through the payload to see if there's a good way to get the album URL, but i couldn't find a field that is reliable. i thought maybe playlistId would work, but when listening to a playlist its the id of the playlist the song is part of rather than the album.

i originally also added a statusDisplayType of STATE to align it with how Spotify rich presence works by default, but i saw there is a much more comprehensive PR open at #3692

Screencast_20250810_084314.webm

[foxfirecodes]

im not sure why my editor insisted on changing that when i saved, but just in case there was some significance to the zero width char ive reverted that one line

[ArjixWasTaken]

looks fine to me

[Copilot]

Pull Request Overview

This PR implements clickable song and artist links in Discord's rich presence feature by leveraging Discord's new rich presence fields. The changes add URL fields to the song information structure and populate them with appropriate YouTube Music links for songs and artists.

• Adds artistUrl field to the SongInfo interface and populates it with the artist's YouTube Music channel URL
• Updates Discord service to include clickable URLs for both song details and artist state in the rich presence
• Minor cleanup of album assignment code structure

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/providers/song-info.ts	Adds artistUrl field to SongInfo interface and populates it from microformat data
src/plugins/discord/discord-service.ts	Integrates song and artist URLs into Discord rich presence activity

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