Description

src/Servy/App.xaml.cs (~290 lines) and src/Servy.Manager/App.xaml.cs (~285 lines) contain near-identical initialization logic:

• OnStartup(): Identical rendering tier detection, software rendering fallback
• OnExit(): Identical SecureData disposal
• InitializeApp(): Both do identical unhandled exception handlers, splash screen parsing, ConfigurationBuilder setup, AppFoldersHelper.EnsureFolders, DatabaseInitializer, ProtectedKeyProvider + SecureData, ResourceHelper.CopyEmbeddedResource calls

Only the log filename and appsettings filename differ.

Estimated redundant lines: ~400

Suggested fix

Extract an AppBootstrapper class in a shared project that handles common initialization. Each App.xaml.cs passes project-specific values (log filename, appsettings filename, MainWindow factory).