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/Users/ChangeUserRoleCommandHandlerTests.cs

@@ -19,14 +19,21 @@ public class ChangeUserRoleCommandHandlerTests
 
         var userId = Guid.NewGuid();
         var roleId = Guid.NewGuid();
-        _roleService.ChangeUserRoleAsync(userId, roleId, Arg.Any<CancellationToken>()).Returns(Result.Success());
+        _roleService
+            .ChangeUserRoleAsync(userId, roleId, Arg.Any<CancellationToken>())
+            .Returns(Result.Success());
 
         var handler = new ChangeUserRoleCommandHandler(_roleService, dbContext, _currentUser);
 
-        var result = await handler.Handle(new ChangeUserRoleCommand(userId, roleId), CancellationToken.None);
+        var result = await handler.Handle(
+            new ChangeUserRoleCommand(userId, roleId),
+            CancellationToken.None
+        );
 
         Assert.True(result.IsSuccess);
-        await _roleService.Received(1).ChangeUserRoleAsync(userId, roleId, Arg.Any<CancellationToken>());
+        await _roleService
+            .Received(1)
+            .ChangeUserRoleAsync(userId, roleId, Arg.Any<CancellationToken>());
         Assert.Single(dbContext.AuditLogs.Local);
     }
 
@@ -38,11 +45,16 @@ public class ChangeUserRoleCommandHandlerTests
         var userId = Guid.NewGuid();
         var roleId = Guid.NewGuid();
         var error = UserErrors.NotFound;
-        _roleService.ChangeUserRoleAsync(userId, roleId, Arg.Any<CancellationToken>()).Returns(Result.Failure(error));
+        _roleService
+            .ChangeUserRoleAsync(userId, roleId, Arg.Any<CancellationToken>())
+            .Returns(Result.Failure(error));
 
         var handler = new ChangeUserRoleCommandHandler(_roleService, dbContext, _currentUser);
 
-        var result = await handler.Handle(new ChangeUserRoleCommand(userId, roleId), CancellationToken.None);
+        var result = await handler.Handle(
+            new ChangeUserRoleCommand(userId, roleId),
+            CancellationToken.None
+        );
 
         Assert.False(result.IsSuccess);
         Assert.Equal(error, result.Error);