Total Followers overlay label only seeds count from Twitch

[verbatimt]

Summary

The "Total Followers" overlay label only seeds its count from Twitch. On Kick, YouTube, or Velora it starts at 0 and just counts new follows that happen while live, so it never reflects a streamer's real existing follower total on those platforms.

Reported by a v1.8 user who runs the label overlay purely for total follows and noticed it was only ever showing their Twitch number.

Current behavior

In MixItUp.Base/Model/Overlay/OverlayLabelV3Model.cs:

• Baseline fetch (L189-L197): the label only queries an actual follower total when DefaultStreamingPlatform == Twitch and Twitch is connected, via TwitchSession.StreamerService.GetFollowerCount. There is no Kick, YouTube, or Velora branch, so a non-Twitch default platform seeds the amount to 0.
• Live increment (L369-L373): OnFollowOccurred does Amount++ for any platform's follow event during the session, which is why the number ticks up on Kick/YouTube but from the wrong starting point.

Expected behavior

Seed the Total Followers count from whichever platforms are connected, or at least from the default platform, so the label shows a real total rather than a Twitch-only or zero baseline.

Notes

• The label-types doc reinforces the mismatch: "Viewer Count" is described as "across all your connected platforms," while "Total Followers" is only "followers / YouTube subscribers." No all-platforms language, so the current behavior matches the docs but not user expectation.
• Scope question for whoever picks this up: does a combined cross-platform total make sense, or should it seed from the default platform only? Worth deciding before implementing.