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.Infrastructure/DependencyInjection.cs

@@ -25,14 +25,22 @@ namespace PnvPanel.Infrastructure;
 /// </summary>
 public static class DependencyInjection
 {
-    public static IServiceCollection AddInfrastructure(this IServiceCollection services, IConfiguration configuration)
+    public static IServiceCollection AddInfrastructure(
+        this IServiceCollection services,
+        IConfiguration configuration
+    )
     {
         // Строка подключения читается лениво внутри лямбды (а не в локальную переменную сразу), иначе
         // в тестах WebApplicationFactory.ConfigureAppConfiguration (Testcontainers-порт) не успевает
         // примениться до регистрации DbContext — окажется закэширован дефолт из appsettings.json.
-        services.AddDbContext<AppDbContext>(options => options.UseNpgsql(
-            configuration["ConnectionStrings:Default"]
-                ?? throw new InvalidOperationException("Строка подключения 'ConnectionStrings:Default' не сконфигурирована.")));
+        services.AddDbContext<AppDbContext>(options =>
+            options.UseNpgsql(
+                configuration["ConnectionStrings:Default"]
+                    ?? throw new InvalidOperationException(
+                        "Строка подключения 'ConnectionStrings:Default' не сконфигурирована."
+                    )
+            )
+        );
         services.AddScoped<IAppDbContext>(sp => sp.GetRequiredService<AppDbContext>());
 
         services
@@ -53,10 +61,13 @@ public static class DependencyInjection
             .AddDefaultTokenProviders();
 
         services.Configure<JwtOptions>(configuration.GetSection(JwtOptions.SectionName));
-        services.Configure<AdminSeedOptions>(configuration.GetSection(AdminSeedOptions.SectionName));
+        services.Configure<AdminSeedOptions>(
+            configuration.GetSection(AdminSeedOptions.SectionName)
+        );
         services.Configure<RolesOptions>(configuration.GetSection(RolesOptions.SectionName));
 
-        var jwtOptions = configuration.GetSection(JwtOptions.SectionName).Get<JwtOptions>()
+        var jwtOptions =
+            configuration.GetSection(JwtOptions.SectionName).Get<JwtOptions>()
             ?? throw new InvalidOperationException("Секция конфигурации 'Jwt' не задана.");
 
         services
@@ -70,7 +81,9 @@ public static class DependencyInjection
                     ValidateAudience = true,
                     ValidAudience = jwtOptions.Audience,
                     ValidateIssuerSigningKey = true,
-                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtOptions.SigningKey)),
+                    IssuerSigningKey = new SymmetricSecurityKey(
+                        Encoding.UTF8.GetBytes(jwtOptions.SigningKey)
+                    ),
                     ValidateLifetime = true,
                     ClockSkew = TimeSpan.FromSeconds(30),
                 };
@@ -82,7 +95,10 @@ public static class DependencyInjection
                     OnMessageReceived = context =>
                     {
                         var accessToken = context.Request.Query["access_token"];
-                        if (!string.IsNullOrEmpty(accessToken) && context.HttpContext.Request.Path.StartsWithSegments("/hubs"))
+                        if (
+                            !string.IsNullOrEmpty(accessToken)
+                            && context.HttpContext.Request.Path.StartsWithSegments("/hubs")
+                        )
                             context.Token = accessToken;
 
                         return Task.CompletedTask;
@@ -106,7 +122,10 @@ public static class DependencyInjection
         services.AddSingleton<IXuiConnectionStringBuilder, VmessConnectionStringBuilder>();
         services.AddSingleton<IXuiConnectionStringBuilder, TrojanConnectionStringBuilder>();
         services.AddSingleton<IXuiConnectionStringBuilder, ShadowsocksConnectionStringBuilder>();
-        services.AddSingleton<IXuiConnectionStringBuilderResolver, XuiConnectionStringBuilderResolver>();
+        services.AddSingleton<
+            IXuiConnectionStringBuilderResolver,
+            XuiConnectionStringBuilderResolver
+        >();
 
         services.AddSingleton<ISecretProtector, DataProtectionSecretProtector>();
         // Singleton: держит кэш per-node XUI-клиентов между запросами (см. XuiPanelGateway).
@@ -123,14 +142,18 @@ public static class DependencyInjection
         services.AddScoped<ICurrentUserSetter>(sp => sp.GetRequiredService<CurrentUser>());
         services.AddScoped<DbInitializer>();
 
-        services.Configure<TrafficRetentionOptions>(configuration.GetSection(TrafficRetentionOptions.SectionName));
+        services.Configure<TrafficRetentionOptions>(
+            configuration.GetSection(TrafficRetentionOptions.SectionName)
+        );
         services.AddHostedService<TrafficSyncService>();
         services.AddHostedService<NodeHealthCheckService>();
         services.AddHostedService<TrafficRetentionService>();
 
         services.Configure<TelegramOptions>(configuration.GetSection(TelegramOptions.SectionName));
 
-        services.Configure<FileStorageOptions>(configuration.GetSection(FileStorageOptions.SectionName));
+        services.Configure<FileStorageOptions>(
+            configuration.GetSection(FileStorageOptions.SectionName)
+        );
         services.AddSingleton<IFileStorage, DiskFileStorage>();
 
         return services;