Tags do not sync across different releases of the exact same track (Single/EP/Album)

[CrysoK]

Bug Description:
Tagify treats different releases of the exact same track (Single, EP, Album) as entirely separate entities. If a user tags a track in a Single release, those tags do not appear when the exact same track is viewed or played from the Album release.

This also happens when artists reorganize or update an album (a common practice for artists like Fred again..), which creates a new release ID. It seems Tagify links tags strictly to the specific Spotify Track ID/URI, rather than recognizing Spotify's linked tracks (tracks that share the same ISRC and play count).

Expected Behavior:
Tags applied to a specific track should persist across all identical versions/releases of that track on Spotify (Single, EP, Album, Deluxe editions). If Spotify treats them as the same song (sharing the same play counter), Tagify should ideally sync or share the tags across all those Track IDs.

Steps to Reproduce:

1. Go to a track from a Single release (e.g., https://open.spotify.com/track/7BrbAwNXRZSMMohE66ETYx).
2. Add some tags to this track using Tagify.
3. Navigate to an Album or EP release containing the exact same track (e.g., https://open.spotify.com/track/4TFWQpcko3fu3jdzbKutDe).
4. See error: The tags previously added do not appear on this version of the track.

Environment:

• Tagify version: v2.3.0
• Operating system: Windows 11

Additional Context:
Here is a perfect example of a track that has 3 different Track IDs but is exactly the same song. Currently, I would have to tag it 3 separate times for the tags to show up wherever I play it from:

• Single ID: https://open.spotify.com/intl-es/track/7BrbAwNXRZSMMohE66ETYx
• EP ID: https://open.spotify.com/intl-es/track/6pchBuurwh7xlNiUrntam4
• Album ID: https://open.spotify.com/intl-es/track/4TFWQpcko3fu3jdzbKutDe

Spotify's Web API usually returns a linked_from object or shares the same external ISRC for these tracks, which might be a way to group them in the plugin's database.

[alexk218]

This is the best bug report I've ever received.
Yes, you're absolutely right. The current track ID-based system has problems.
I didn't think to use play count or ISRC to recognize linked tracks.
I'll look into implementing this fix as soon as possible.
Thank you!

[alexk218]

Earlier I posted a beta version that attempts to solve this problem.
I've deleted it from this conversation - I noticed that there are some serious problems with it.
I'm still working on putting together a solution for this

[CrysoK]

Yeah, I tested it and noticed it was a bit buggy, but I didn't get around to reporting it. Thanks for taking the time to work on this