add showDownloadsButton to navbar sync/default settings

[jmawet]

Pull Request

Summary

Provide a brief description of what this PR changes and why.

Related Issues

Link related issues or tickets separated by commas.

• Closes #
• Fixes #
• Related to add downloads button to navbars Moonfin-Core#1431

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.

• add showDownloadsButton same as other navbar buttons

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: add downloads button to navbars Moonfin-Core#1431
• 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:)
• Manual testing completed
• Not tested (explain why):

Test Steps

Screenshots (if applicable)

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

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	eaf8915
Workflow	Build #362