Replaced all checks and UI visibility conditions using LoggedInModel.IsDeveloper with LoggedInModel.IsAdministrator across Blazor components and grid templates. This change restricts advanced features and UI elements to administrator users instead of developer users. The "Delete" toolbar item remains accessible to developers. No other logic or functionality was modified.
- Switch FruitBankConstClient.BaseUrl to HTTPS for localhost.
- Pin DevExpress.Blazor to 25.1.3 in client project.
- Add Microsoft.Extensions.ObjectPool v9 to test project for SignalR.
- Reformat App.razor markup; comment out ResourcePreloader.
- Render @Body only if logged in or on login page in MainLayout.
- Redirect to /Login if not authenticated after auto-login.
- Add SandboxEndpointSimpleTests.cs for HTTP/SignalR endpoint tests against local sandbox.
Introduces ISecureCredentialService abstraction and platform-specific implementations for secure credential storage (WebAssembly, MAUI, server). Refactors LoggedInModel to support async auto-login, login, and logout using stored credentials. Updates DI and UI logic to enable seamless auto-login and logout across all platforms. Cleans up redundant navigation checks and improves maintainability.