Initial commit: HelpDesk ICHN - .NET 10 backend + Next.js 16 frontend

backend/HelpDesk.API/Services/IPasswordService.cs

@@ -0,0 +1,7 @@
+namespace HelpDesk.API.Services;
+
+public interface IPasswordService
+{
+    string HashPassword(string password);
+    bool VerifyPassword(string password, string hashedPassword);
+}