Update package versions and improve null safety in tests

- Updated various package versions in `Directory.Packages.props` to the latest compatible releases, enhancing overall stability and security.
- Modified test assertions in `GrantBillingGiftCommandHandlerTests`, `RejectPaymentRequestCommandHandlerTests`, `BlockUserCommandHandlerTests`, and `DeleteUserCommandHandlerTests` to use null-safe checks, ensuring robustness against potential null reference exceptions.
- Updated PostgreSqlContainer initialization in `PnvPanelWebApplicationFactory` for improved clarity and maintainability.

backend/Directory.Packages.props

@@ -1,46 +1,43 @@
-<Project>
-  <PropertyGroup>
-    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
-  </PropertyGroup>
-  <ItemGroup>
-    <PackageVersion Include="FluentValidation" Version="12.1.1" />
-    <PackageVersion Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.9" />
-    <PackageVersion Include="Microsoft.AspNetCore.DataProtection.Extensions" Version="10.0.9" />
-    <PackageVersion Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.3.11" />
-    <PackageVersion Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="10.0.9" />
-    <PackageVersion Include="Microsoft.AspNetCore.OpenApi" Version="10.0.9" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.Relational" Version="10.0.9" />
-    <PackageVersion
-      Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore"
-      Version="10.0.9"
-    />
-    <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.9" />
-    <PackageVersion Include="Microsoft.OpenApi" Version="2.9.0" />
-    <PackageVersion Include="Scalar.AspNetCore" Version="2.16.7" />
-    <PackageVersion Include="Serilog.AspNetCore" Version="10.0.0" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore" Version="10.0.9" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.9">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageVersion>
-    <PackageVersion Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.2" />
-    <PackageVersion Include="Microsoft.Extensions.Configuration.Abstractions" Version="10.0.9" />
-    <PackageVersion
-      Include="Microsoft.Extensions.DependencyInjection.Abstractions"
-      Version="10.0.9"
-    />
-    <PackageVersion Include="System.IdentityModel.Tokens.Jwt" Version="8.19.1" />
-    <PackageVersion Include="Telegram.Bot" Version="22.10.1" />
-    <PackageVersion Include="ThreeXui.Net" Version="1.0.2" />
-    <!-- Тестирование (M8) -->
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
-    <PackageVersion Include="xunit" Version="2.9.3" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.4" />
-    <PackageVersion Include="NSubstitute" Version="5.3.0" />
-    <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.9" />
-    <PackageVersion Include="Testcontainers.PostgreSql" Version="4.2.0" />
-    <!-- InMemory, не Sqlite/Npgsql — модель использует Postgres-специфичные типы (uuid[], jsonb),
-         не имеющие реляционных аналогов; InMemory игнорирует HasColumnType и не требует их маппинга. -->
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.InMemory" Version="10.0.9" />
-  </ItemGroup>
-</Project>
+<Project>
+  <PropertyGroup>
+    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageVersion Include="FluentValidation" Version="12.1.1" />
+    <PackageVersion Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.10" />
+    <PackageVersion Include="Microsoft.AspNetCore.DataProtection.Extensions" Version="10.0.10" />
+    <PackageVersion Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.3.11" />
+    <PackageVersion Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="10.0.10" />
+    <PackageVersion Include="Microsoft.AspNetCore.OpenApi" Version="10.0.10" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.Relational" Version="10.0.10" />
+    <PackageVersion Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore" Version="10.0.10" />
+    <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.10" />
+    <!-- Держим 2.x: Microsoft.AspNetCore.OpenApi 10.0.10 сам зависит от Microsoft.OpenApi >=2.0.0
+         (nuspec) и его Roslyn source generator (XmlCommentGenerator) скомпилирован под 2.x API —
+         3.x меняет IOpenApiMediaType.Example на read-only и ломает генерацию (CS0200). -->
+    <PackageVersion Include="Microsoft.OpenApi" Version="2.11.0" />
+    <PackageVersion Include="Scalar.AspNetCore" Version="2.16.16" />
+    <PackageVersion Include="Serilog.AspNetCore" Version="10.0.0" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore" Version="10.0.10" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.10">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageVersion>
+    <PackageVersion Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.3" />
+    <PackageVersion Include="Microsoft.Extensions.Configuration.Abstractions" Version="10.0.10" />
+    <PackageVersion Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.10" />
+    <PackageVersion Include="System.IdentityModel.Tokens.Jwt" Version="8.21.0" />
+    <PackageVersion Include="Telegram.Bot" Version="22.10.2" />
+    <PackageVersion Include="ThreeXui.Net" Version="1.0.2" />
+    <!-- Тестирование (M8) -->
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
+    <PackageVersion Include="xunit" Version="2.9.3" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
+    <PackageVersion Include="NSubstitute" Version="6.0.0" />
+    <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.10" />
+    <PackageVersion Include="Testcontainers.PostgreSql" Version="4.13.0" />
+    <!-- InMemory, не Sqlite/Npgsql — модель использует Postgres-специфичные типы (uuid[], jsonb),
+         не имеющие реляционных аналогов; InMemory игнорирует HasColumnType и не требует их маппинга. -->
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.InMemory" Version="10.0.10" />
+  </ItemGroup>
+</Project>

backend/tests/PnvPanel.Application.Tests/Admin/Billing/GrantBillingGiftCommandHandlerTests.cs

@@ -74,7 +74,7 @@ public class GrantBillingGiftCommandHandlerTests
             .Received(1)
             .NotifyUserAsync(
                 userId,
-                Arg.Is<string>(m => m.Contains("30")),
+                Arg.Is<string>(m => m!.Contains("30")),
                 Arg.Any<string?>(),
                 Arg.Any<CancellationToken>()
             );

backend/tests/PnvPanel.Application.Tests/Admin/Billing/RejectPaymentRequestCommandHandlerTests.cs

@@ -71,7 +71,7 @@ public class RejectPaymentRequestCommandHandlerTests
             .Received(1)
             .NotifyUserAsync(
                 userId,
-                Arg.Is<string>(m => m.Contains("Платёж не найден")),
+                Arg.Is<string>(m => m!.Contains("Платёж не найден")),
                 Arg.Any<string?>(),
                 Arg.Any<CancellationToken>()
             );

backend/tests/PnvPanel.Application.Tests/Admin/Users/BlockUserCommandHandlerTests.cs

@@ -118,7 +118,7 @@ public class BlockUserCommandHandlerTests
         await _gateway
             .Received(1)
             .UpdateClientAsync(
-                Arg.Is<Node>(n => n.Id == node.Id),
+                Arg.Is<Node>(n => n!.Id == node.Id),
                 inbound.RemoteInboundId,
                 config.ClientExternalId,
                 config.Protocol,

backend/tests/PnvPanel.Application.Tests/Admin/Users/DeleteUserCommandHandlerTests.cs

@@ -99,7 +99,7 @@ public class DeleteUserCommandHandlerTests
         await _gateway
             .Received(1)
             .RemoveClientAsync(
-                Arg.Is<Node>(n => n.Id == node.Id),
+                Arg.Is<Node>(n => n!.Id == node.Id),
                 inbound.RemoteInboundId,
                 "external-id",
                 config.Protocol,

backend/tests/PnvPanel.IntegrationTests/TestSupport/PnvPanelWebApplicationFactory.cs

@@ -20,8 +20,7 @@ public sealed class PnvPanelWebApplicationFactory : WebApplicationFactory<Progra
     public const string AdminUserName = "test-admin";
     public const string AdminPassword = "TestAdmin123!";
 
-    private readonly PostgreSqlContainer _postgres = new PostgreSqlBuilder()
-        .WithImage("postgres:17-alpine")
+    private readonly PostgreSqlContainer _postgres = new PostgreSqlBuilder("postgres:17-alpine")
         .WithDatabase("pnvpanel")
         .WithUsername("pnvpanel")
         .WithPassword("pnvpanel")