refactor: consolidate project structure by migrating authentication, identity, and shared UI components while removing legacy Web Client files.

src/NexusReader.Application/Abstractions/Services/INativeStorageService.cs

@@ -9,4 +9,8 @@ public interface INativeStorageService
     Result SaveBool(string key, bool value);
     Result<bool> GetBool(string key, bool defaultValue = false);
     Result Remove(string key);
+    
+    Task<Result> SaveSecureString(string key, string value);
+    Task<Result<string?>> GetSecureString(string key);
+    Result RemoveSecure(string key);
 }