Add opt-in "Play on startup" setting

[Copilot]

The app restores the previously selected station on launch but never begins playback automatically. Users expecting audio to start immediately after the app opens (especially when launched at Windows startup) had no way to enable this behavior.

Changes

• SettingsService — new AutoPlayOnStartup bool persisted in LocalSettings, defaults to false to prevent unexpected autoplay
• PlayerViewModel constructor — calls _player.Play() immediately after stream initialization when AutoPlayOnStartup is set
• SettingsViewModel — exposes IsAutoPlayOnStartupEnabled and AutoPlayOnStartupToggleText for two-way UI binding
• SettingsPage.xaml — adds a "Play on startup" ToggleSwitch below the existing "Open on startup" toggle with a descriptive subtitle

// PlayerViewModel constructor — after InitializeStream()
if (SettingsService.AutoPlayOnStartup)
    _player.Play();

Setting is opt-in to avoid the confusing/annoying experience of music starting unexpectedly on every login.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• ndavsblobprodwus219.blob.core.windows.net
  • Triggering command: /usr/bin/dotnet dotnet restore --no-dependencies /tmp/codeql-scratch-09a801a7dd23cb56/dbs/csharp/working/7308510B18BD5F018EBF4978576AFCBB/missingpackages_workingdir --packages /tmp/codeql-scratch-09a801a7dd23cb56/dbs/csharp/working/missingpackages /p:DisableImplicitNuGetFallbackFolder=true --verbosity normal --configfile /tmp/codeql-scratch-09a801a7dd23cb56/dbs/csharp/working/nugetconfig/nuget.config --force (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)