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/src/PnvPanel.Application/Configs/Rotate/RotateVpnConfigCommandHandler.cs

@@ -8,28 +8,39 @@ using PnvPanel.Domain.Configs;
 namespace PnvPanel.Application.Configs.Rotate;
 
 public sealed class RotateVpnConfigCommandHandler(
-    IAppDbContext dbContext, IXuiPanelGateway gateway, IIdentityService identityService, ICurrentUser currentUser)
-    : ICommandHandler<RotateVpnConfigCommand, Result<VpnConfigDto>>
+    IAppDbContext dbContext,
+    IXuiPanelGateway gateway,
+    IIdentityService identityService,
+    ICurrentUser currentUser
+) : ICommandHandler<RotateVpnConfigCommand, Result<VpnConfigDto>>
 {
-    public async Task<Result<VpnConfigDto>> Handle(RotateVpnConfigCommand command, CancellationToken cancellationToken)
+    public async Task<Result<VpnConfigDto>> Handle(
+        RotateVpnConfigCommand command,
+        CancellationToken cancellationToken
+    )
     {
         if (currentUser.UserId is not { } userId)
             return Result.Failure<VpnConfigDto>(AuthErrors.Unauthorized);
 
-        var config = await dbContext.VpnConfigs
-            .FirstOrDefaultAsync(c => c.Id == command.ConfigId && c.UserId == userId, cancellationToken);
+        var config = await dbContext.VpnConfigs.FirstOrDefaultAsync(
+            c => c.Id == command.ConfigId && c.UserId == userId,
+            cancellationToken
+        );
         if (config is null)
             return Result.Failure<VpnConfigDto>(ConfigErrors.NotFound);
 
         if (config.Status != ConfigStatus.Active)
             return Result.Failure<VpnConfigDto>(ConfigErrors.NotFound);
 
-        var inbound = await dbContext.Inbounds.AsNoTracking()
+        var inbound = await dbContext
+            .Inbounds.AsNoTracking()
             .FirstOrDefaultAsync(i => i.Id == config.InboundId, cancellationToken);
         if (inbound is null)
             return Result.Failure<VpnConfigDto>(ConfigErrors.InboundNotAvailable);
 
-        var node = await dbContext.Nodes.AsNoTracking().FirstOrDefaultAsync(n => n.Id == inbound.NodeId, cancellationToken);
+        var node = await dbContext
+            .Nodes.AsNoTracking()
+            .FirstOrDefaultAsync(n => n.Id == inbound.NodeId, cancellationToken);
         if (node is null)
             return Result.Failure<VpnConfigDto>(ConfigErrors.NodeDisabled);
 
@@ -39,8 +50,14 @@ public sealed class RotateVpnConfigCommandHandler(
 
         var newClientEmail = VpnConfig.GenerateClientEmail(userId);
         var addResult = await gateway.AddClientAsync(
-            node, inbound.RemoteInboundId, config.Protocol, newClientEmail,
-            config.Label ?? newClientEmail, profile.MaxIpLimit, cancellationToken);
+            node,
+            inbound.RemoteInboundId,
+            config.Protocol,
+            newClientEmail,
+            config.Label ?? newClientEmail,
+            profile.MaxIpLimit,
+            cancellationToken
+        );
 
         if (!addResult.IsSuccess)
             return Result.Failure<VpnConfigDto>(addResult.Error);
@@ -51,7 +68,13 @@ public sealed class RotateVpnConfigCommandHandler(
 
         // Старого клиента удаляем ПОСЛЕ коммита нового состояния: если удаление не выйдет,
         // у пользователя просто останется лишний нерабочий-для-него клиент в панели — не критично.
-        await gateway.RemoveClientAsync(node, inbound.RemoteInboundId, oldClientExternalId, config.Protocol, cancellationToken);
+        await gateway.RemoveClientAsync(
+            node,
+            inbound.RemoteInboundId,
+            oldClientExternalId,
+            config.Protocol,
+            cancellationToken
+        );
 
         return Result.Success(VpnConfigDto.FromDomain(config, inbound));
     }