Refactored Mango.Sandbox.EndPoints to enable minimal, dependency-light SignalR endpoint testing. Introduced DevAdminSignalRHubSandbox and TestSignalREndpoint for protocol/contract tests without full NopCommerce/FruitBank infra. Added SignalRClientSandbox and comprehensive MSTest coverage for all parameter types. Simplified Program.cs startup, updated project references, and added minimal logger. Original SignalREndpointTests replaced with focused, low-level and high-level tests. CORS and DTOs updated for compatibility.
Loretta
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