[DiscordRPC] Fix RPC showing previous song on Linux

[Alan7A]

Discord RPC displayed the previous track after a song transition.
This seems to be caused by a race condition between the TIME_UPDATE and onMediaTransition events, combined with asyncDebounce. A delayed, debounced TIME_UPDATE could call updateActivity with stale data and overwrite the newer info from onMediaTransition, so Discord ends up showing the previous track.

What I changed:

• Removed TIME_UPDATE interception: Discord calculates playback progress locally using startTimestamp/endTimestamp, making constant updates unnecessary
• Pass mediaItem directly to updateActivity in onMediaTransition: Ensures the correct media item is used immediately, avoiding stale data from fromPlaybackContext()
• Removed asyncDebounce: No longer needed since TIME_UPDATE was the main source of rapid calls

Result:

• Fewer RPC calls
• Song transitions now update Discord immediately and correctly

I tested on Linux and Windows, the plugin seems to work as expected on both. Any feedback is welcome :)

[Inrixia]

This looks awesome!
Could you unwrap MediaItem.onMediaTransition

Otherwise is perfect and will merge as soon as that's sorted 💜

[Alan7A]

Sure!! It's done :)

[Inrixia]

Perfect! Thanks