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/Auth/GetCurrentUserQueryHandlerTests.cs

@@ -27,9 +27,14 @@ public class GetCurrentUserQueryHandlerTests
     public async Task Handle_ProfileMissing_ReturnsUnauthorized()
     {
         var userId = Guid.NewGuid();
-        _identityService.GetProfileAsync(userId, Arg.Any<CancellationToken>()).Returns((CurrentUserProfile?)null);
+        _identityService
+            .GetProfileAsync(userId, Arg.Any<CancellationToken>())
+            .Returns((CurrentUserProfile?)null);
 
-        var handler = new GetCurrentUserQueryHandler(_identityService, FakeCurrentUser.Authenticated(userId));
+        var handler = new GetCurrentUserQueryHandler(
+            _identityService,
+            FakeCurrentUser.Authenticated(userId)
+        );
 
         var result = await handler.Handle(new GetCurrentUserQuery(), CancellationToken.None);
 
@@ -41,12 +46,26 @@ public class GetCurrentUserQueryHandlerTests
     public async Task Handle_AuthenticatedWithProfile_ReturnsCurrentUserDto()
     {
         var userId = Guid.NewGuid();
-        var profile = new CurrentUserProfile(userId, "alice", Guid.NewGuid(), "user", true, false, 3, RoleQuota.Unlimited, "sub-token");
+        var profile = new CurrentUserProfile(
+            userId,
+            "alice",
+            Guid.NewGuid(),
+            "user",
+            true,
+            false,
+            3,
+            RoleQuota.Unlimited,
+            "sub-token"
+        );
         _identityService.GetProfileAsync(userId, Arg.Any<CancellationToken>()).Returns(profile);
-        _identityService.GetTelegramLinkInfoAsync(userId, Arg.Any<CancellationToken>())
+        _identityService
+            .GetTelegramLinkInfoAsync(userId, Arg.Any<CancellationToken>())
             .Returns(new TelegramLinkInfo(true, 42, "alice_tg"));
 
-        var handler = new GetCurrentUserQueryHandler(_identityService, FakeCurrentUser.Authenticated(userId, "alice"));
+        var handler = new GetCurrentUserQueryHandler(
+            _identityService,
+            FakeCurrentUser.Authenticated(userId, "alice")
+        );
 
         var result = await handler.Handle(new GetCurrentUserQuery(), CancellationToken.None);