bugfix-CWNU - Properly sync Continue Watching and Next Up Hidden Items

[mattsigal]

Pull Request

Summary

Fixes an issue where items marked as "Hide from Continue Watching" or "Hide from Next Up" on one device were overwritten and wiped out when other devices synced or pushed profile updates to Moonbase. This caused items that were hidden from the CW&NU row to reappear when they shouldn't be able to.

Related Issues

Link related issues or tickets separated by commas.

• Closes #
• Fixes #
• Related to #

Type of Change

• Bug fix
• New feature
• Refactor
• Performance improvement
• API / endpoint change
• Settings schema change
• Documentation update
• Build/CI change
• Other (describe):

Area

• Settings sync / profiles
• Admin defaults / config page
• Ratings (MDBList / TMDB)
• Notifications / Push (FCM / relay)
• Seerr integration
• Games / Emulators
• Custom home rows
• Web Client (Go to Moonfin-Core repo)
• Other / shared

Changes Made

List the key changes included in this PR.

• Included settings.Global in UnionHiddenEntries across both Jellyfin and Emby backend MoonfinSettingsService.cs implementations so existing hidden items stored in the global profile persist across subsequent device profile pushes.
• Updated UnionHiddenEntries to merge dictionaries by item ID and keep the latest ISO-8601 timestamp per item.
• Added unit test SuccessiveDeviceProfileSavesPreserveGlobalHiddenItems in AdminDefaultsMergeTests.cs verifying multi-device sync persistence and resolution.

Client Impact

Does this need matching changes in a client repo (Core, Smart-TV, Roku)?

• No client changes needed
• Companion client PR(s) required, linked here:
• New setting keys added. List each key and confirm it matches the client key exactly, including casing:

Compatibility

• Change to the settings profile is additive only, no renamed or removed properties
• New properties use the same type the client sends (a client bool maps to bool?, an int to int?)
• Migration added for any renamed or removed settings
• Older clients still work, unknown fields are ignored and no keys were removed

Testing

Describe how this change was tested.

• Built the plugin and deployed to a Jellyfin server
• Verified against a live client (which one:) Windows Desktop and Android-TV (both stable releases)
• Manual testing completed
• Not tested (explain why): Ran dotnet build on Jellyfin and Emby plugin projects to ensure clean compilation and verified unit tests in AdminDefaultsMergeTests.cs covering successive device profile saves and global resolution. Discovered this issue while investigating the CW&NU slow-down (which turns out to be unrelated), but can properly test this PR after I finish with the Moonfin-Core one. NOW PROPERLY TESTED :)

Test Steps

1. Mark item on Client A as "hidden"
2. Open Moonfin on Client B and make sure the CW&NU rows match

Screenshots (if applicable)

Include config page screenshots or request/response samples where relevant.

These screenshots jump between Windows Desktop and Android-TV to show the near instant syncing between the clients in terms of hiding content from CW&NU:

Checklist

• Code builds successfully
• Code follows project style and conventions
• No unnecessary commented-out code
• No new warnings introduced
• Any new setting keys match the client-side keys exactly

[github-actions]

Build Successful

The plugin compiled successfully against .NET 8 / Jellyfin 10.10.0.

Property	Value
Commit	5a6a5c2
Workflow	Build #358