Refactor project files for improved readability and structure

- Cleaned up whitespace in Directory.Build.props and Directory.Packages.props for consistency.
- Reformatted project file references in PnvPanel.Api.csproj for better clarity.
- Enhanced code readability in various endpoint files by adjusting line breaks and indentation.
- Standardized method signatures and improved formatting in ResultExtensions and multiple endpoint classes for better maintainability.

backend/tests/PnvPanel.Application.Tests/Admin/Nodes/RegisterNodeCommandHandlerTests.cs

@@ -21,9 +21,20 @@ public class RegisterNodeCommandHandlerTests
         _gateway.ValidateBaseAddress(Arg.Any<Uri>()).Returns(Result.Success());
         _secretProtector.Protect("secret-password").Returns("protected-secret-password");
 
-        var handler = new RegisterNodeCommandHandler(dbContext, _gateway, _secretProtector, _currentUser);
+        var handler = new RegisterNodeCommandHandler(
+            dbContext,
+            _gateway,
+            _secretProtector,
+            _currentUser
+        );
 
-        var command = new RegisterNodeCommand("node-1", "https://node1.example.com", "admin", "secret-password", "eu-west");
+        var command = new RegisterNodeCommand(
+            "node-1",
+            "https://node1.example.com",
+            "admin",
+            "secret-password",
+            "eu-west"
+        );
 
         var result = await handler.Handle(command, CancellationToken.None);
 
@@ -31,7 +42,10 @@ public class RegisterNodeCommandHandlerTests
         Assert.Equal("node-1", result.Value.Name);
         Assert.Equal("admin", result.Value.Username);
         Assert.Single(dbContext.Nodes.Local);
-        Assert.Equal("protected-secret-password", dbContext.Nodes.Local.Single().Credentials.ProtectedPassword);
+        Assert.Equal(
+            "protected-secret-password",
+            dbContext.Nodes.Local.Single().Credentials.ProtectedPassword
+        );
     }
 
     [Fact]
@@ -39,9 +53,20 @@ public class RegisterNodeCommandHandlerTests
     {
         using var dbContext = InMemoryDbContextFactory.Create();
 
-        var handler = new RegisterNodeCommandHandler(dbContext, _gateway, _secretProtector, _currentUser);
+        var handler = new RegisterNodeCommandHandler(
+            dbContext,
+            _gateway,
+            _secretProtector,
+            _currentUser
+        );
 
-        var command = new RegisterNodeCommand("node-1", "not-a-uri", "admin", "secret-password", null);
+        var command = new RegisterNodeCommand(
+            "node-1",
+            "not-a-uri",
+            "admin",
+            "secret-password",
+            null
+        );
 
         var result = await handler.Handle(command, CancellationToken.None);
 
@@ -59,9 +84,20 @@ public class RegisterNodeCommandHandlerTests
         var error = Error.Validation("Nodes.SchemeNotAllowed", "Разрешён только HTTPS.");
         _gateway.ValidateBaseAddress(Arg.Any<Uri>()).Returns(Result.Failure(error));
 
-        var handler = new RegisterNodeCommandHandler(dbContext, _gateway, _secretProtector, _currentUser);
+        var handler = new RegisterNodeCommandHandler(
+            dbContext,
+            _gateway,
+            _secretProtector,
+            _currentUser
+        );
 
-        var command = new RegisterNodeCommand("node-1", "http://node1.example.com", "admin", "secret-password", null);
+        var command = new RegisterNodeCommand(
+            "node-1",
+            "http://node1.example.com",
+            "admin",
+            "secret-password",
+            null
+        );
 
         var result = await handler.Handle(command, CancellationToken.None);