feat-settingsync - Allow for Custom Home Rows Sync across devices

[mattsigal]

Pull Request

Summary

Fixes issues preventing fully custom home rows (e.g. Letterboxd activity, custom IMDb/TMDB lists created via the Custom Home Rows Wizard) from syncing, authenticating on new installs, and propagating across device profiles.

Related Issues

Link related issues or tickets separated by commas.

• Closes #
• Fixes #
• Related to # feat-settings-sync - Allow for Custom Home Rows Sync across devices Plugin#209

Type of Change

• Bug fix
• New feature
• Refactor
• Performance improvement
• UI/UX update
• Documentation update
• Build/CI change
• Other (describe):

Changes Made

List the key changes included in this PR.

• Fixed 401 Unauthorized responses from /Moonfin/CustomRows/Items on new installs by replacing raw Authorization header with buildServerAuthorizationHeader in CustomExternalListsService.
• Normalized serverId to 'custom' across fromJson() deserialization and stableId getter in HomeSectionConfig.
• Updated _applyServerSettingsUnbatched() in PluginSyncService to preserve pre-existing custom dynamic sections (enabled: false) when applying incoming server profiles.

Platform

• Android
• iOS
• tvOS
• Web
• macOS
• Windows
• Linux
• All / Shared code

Testing

Describe how this change was tested.

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

Test Steps

1. Created a Custom Home Row (Letterboxd user list "Matt's Activity") on Windows Desktop.
2. Verified item fetching authenticated with 200 OK on /Moonfin/CustomRows/Items.
3. Launched clean Android TV Beta client on Nvidia Shield TV Pro (192.168.0.224).
4. Confirmed "Matt's Activity" appeared under "Saved Custom Home Rows" in the Custom Home Rows Wizard.
5. Toggled "Matt's Activity" to ON on the Shield and verified items rendered cleanly on the Android TV homepage.

Screenshots (if applicable)

Include screenshots or recordings for UI changes.

Adding a Custom Home Row in Windows Desktop:

Available in Home Sections:

Custom Home Row on Windows Desktop:

Synced to Android TV (TV profile, so pulled in disabled):

Checklist

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