Move on to the next episode through the SyncPlay group

[Kisnov]

Summary

Inside a SyncPlay group, the next episode started on this TV alone. The group's commands for the previous entry then landed on it, so Next Up kept coming back and played on through the series. Moving on now goes through the group, as on Moonfin-Core.

Split out of #538, which keeps the group queue and the in-player SyncPlay button and builds on this one.

Related Issues

• None open.

Type of Change

• Bug fix

Changes Made

• Next Up, the end of an episode and the episode browser ask the group to move on (next, previous or a queue entry) instead of playing the episode here. The group's queue update then brings every player along.
• A command for another queue entry is dropped, as Core does.
• Queue edits and repeat or shuffle changes no longer start the group's item on a TV that has nothing playing.

Platform

• Tizen (Samsung)
• webOS (LG)
• Vega (Fire TV)
• Xbox
• All / Shared code

Testing

• Tested on emulator
• Tested on physical device
• Manual testing completed
• Not tested (explain why):

Draft: testing on a Samsung TU43DU7105KXXC (Tizen 9) is in progress. webOS shares the code but won't be tested, as I have no LG set. npm test --workspace @moonfin/app passes (254 suites with #538 on top), as do npm run lint and npm run lint:css.

Test Steps

1. Join a SyncPlay group from two devices and play an episode of a series.
2. Let Next Up count down at the end: both devices move on together and Next Up doesn't come back.
3. Reorder or remove a queue entry from a device sitting outside the player: it stays where it is.

Screenshots (if applicable)

No visual change.

Checklist

• Code builds successfully
• Code follows project style and conventions
• No unnecessary commented-out code
• No new warnings introduced

Written with help from an AI assistant (Claude Code). I'm testing it on my own TV before marking it ready.

🤖 Generated with Claude Code

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✅ Build Successful

All platform builds and the test suite passed. You can download the artifacts below.

Platform	Status	Artifact
webOS	✅ Passed	Moonfin_webOS_*.ipk
Tizen Regular	✅ Passed	Moonfin_Tizen_Regular_*.wgt
Tizen Oblong	✅ Passed	Moonfin_Tizen_Oblong_*.wgt
Tizen Legacy	✅ Passed	Moonfin_Tizen_Legacy_*.wgt
Vega	✅ Passed	web bundle and shell checks

Property	Value
Commit	56e8475
Workflow run	Build #494