diff --git a/src/BuildFlow.Host/BuildFlowHostModule.cs b/src/BuildFlow.Host/BuildFlowHostModule.cs
index 0302489..d8f1153 100644
--- a/src/BuildFlow.Host/BuildFlowHostModule.cs
+++ b/src/BuildFlow.Host/BuildFlowHostModule.cs
@@ -16,7 +16,6 @@ using IM.Application;
 using IM.Domain.Common;
 using IM.Infrastructure;
 using BuildFlow.Platform.Application;
-using BuildFlow.Platform.Infrastructure.Persistence;
 using Volo.Abp;
 using Volo.Abp.Modularity;
 using Workflow.Application;
diff --git a/src/BuildFlow.Host/Configuration/DatabaseInitializer.cs b/src/BuildFlow.Host/Configuration/DatabaseInitializer.cs
index ebc678b..9bccad8 100644
--- a/src/BuildFlow.Host/Configuration/DatabaseInitializer.cs
+++ b/src/BuildFlow.Host/Configuration/DatabaseInitializer.cs
@@ -3,13 +3,9 @@ using BuildFlow.Platform.Infrastructure.Persistence;
 using File.Infrastructure.Persistence;
 using IM.Infrastructure.Mongo;
 using IM.Infrastructure.Persistence;
-using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Diagnostics;
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Logging;
 using MongoDB.Entities;
 using Workflow.Infrastructure.Persistence;
-using RagSeedData = BuildFlow.Infrastructure.Persistence.SeedData;
 using PlatformSeedData = BuildFlow.Platform.Infrastructure.Persistence.SeedData;
 using WorkflowSeedData = Workflow.Infrastructure.Persistence.SeedData;
 
diff --git a/src/BuildFlow.Host/Configuration/HostObjectAccessors.cs b/src/BuildFlow.Host/Configuration/HostObjectAccessors.cs
index 9f1c3ca..366367e 100644
--- a/src/BuildFlow.Host/Configuration/HostObjectAccessors.cs
+++ b/src/BuildFlow.Host/Configuration/HostObjectAccessors.cs
@@ -1,7 +1,3 @@
-using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Routing;
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Hosting;
 using Volo.Abp.DependencyInjection;
 
 namespace BuildFlow.Host.Configuration;
diff --git a/src/modules/file/Application/Features/Files/Handlers/DeleteFileCommandHandler.cs b/src/modules/file/Application/Features/Files/Handlers/DeleteFileCommandHandler.cs
index 4f23223..b6001f1 100644
--- a/src/modules/file/Application/Features/Files/Handlers/DeleteFileCommandHandler.cs
+++ b/src/modules/file/Application/Features/Files/Handlers/DeleteFileCommandHandler.cs
@@ -1,10 +1,8 @@
 using File.Application.Events;
 using File.Application.Features.Files.Commands;
-using File.Domain.Entities;
 using File.Infrastructure.Persistence;
 using File.Infrastructure.Storage;
 using MediatR;
-using Microsoft.EntityFrameworkCore;
 
 namespace File.Application.Features.Files.Handlers;
 
diff --git a/src/modules/platform/Infrastructure/PlatformInfrastructureModule.cs b/src/modules/platform/Infrastructure/PlatformInfrastructureModule.cs
index 00ca88a..bedf14e 100644
--- a/src/modules/platform/Infrastructure/PlatformInfrastructureModule.cs
+++ b/src/modules/platform/Infrastructure/PlatformInfrastructureModule.cs
@@ -10,9 +10,6 @@ namespace BuildFlow.Platform.Infrastructure;
 
 /// <summary>平台基础能力基础设施层模块。注册 PlatformDbContext（连 platform 库）。</summary>
 [DependsOn(typeof(PlatformDomainModule))]
-/// <summary>
-/// undefined
-/// </summary>
 public class PlatformInfrastructureModule : AbpModule
 {
     public override void ConfigureServices(ServiceConfigurationContext context)
@@ -23,6 +20,7 @@ public class PlatformInfrastructureModule : AbpModule
         var conn = $"{config.GetConnectionString("Default")};Database={config["DatabaseNames:Platform"]}";
         services.AddDbContext<PlatformDbContext>((sp, options) =>
             options.UseNpgsql(conn)
+                   .UseSnakeCaseNamingConvention()
                    .AddInterceptors(sp.GetRequiredService<AuditInterceptor>()));
         services.AddScoped<AuditInterceptor>();
     }
diff --git a/tests/BuildFlow.Architecture.Tests/HostArchitectureTests.cs b/tests/BuildFlow.Architecture.Tests/HostArchitectureTests.cs
index 3d08882..907417b 100644
--- a/tests/BuildFlow.Architecture.Tests/HostArchitectureTests.cs
+++ b/tests/BuildFlow.Architecture.Tests/HostArchitectureTests.cs
@@ -1,6 +1,5 @@
 namespace BuildFlow.Architecture.Tests;
 
-using System.Xml.Linq;
 using Xunit;
 
 /// <summary>
diff --git a/tests/BuildFlow.IM.Integration.Tests/ChatHubMessagingTests.cs b/tests/BuildFlow.IM.Integration.Tests/ChatHubMessagingTests.cs
index 06b4f07..49c18a1 100644
--- a/tests/BuildFlow.IM.Integration.Tests/ChatHubMessagingTests.cs
+++ b/tests/BuildFlow.IM.Integration.Tests/ChatHubMessagingTests.cs
@@ -1,13 +1,11 @@
 using IM.Application.Chat.DTOs;
 using IM.Domain.Common;
 using IM.Domain.Enums;
-using IM.Infrastructure.Mongo;
 using IM.Infrastructure.Persistence;
 using Xunit;
 using Microsoft.AspNetCore.SignalR.Client;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.DependencyInjection;
-using MongoDB.Driver;
 
 namespace BuildFlow.IM.Integration.Tests;
 
diff --git a/tests/BuildFlow.IM.Integration.Tests/ChatHubReadAndRecallTests.cs b/tests/BuildFlow.IM.Integration.Tests/ChatHubReadAndRecallTests.cs
index 4275197..2daf7f8 100644
--- a/tests/BuildFlow.IM.Integration.Tests/ChatHubReadAndRecallTests.cs
+++ b/tests/BuildFlow.IM.Integration.Tests/ChatHubReadAndRecallTests.cs
@@ -1,11 +1,9 @@
 using IM.Application.Chat.DTOs;
 using IM.Domain.Common;
 using IM.Domain.Enums;
-using IM.Infrastructure.Mongo;
 using IM.Infrastructure.Persistence;
 using Xunit;
 using Microsoft.AspNetCore.SignalR.Client;
-using MongoDB.Driver;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.DependencyInjection;
 
diff --git a/tests/BuildFlow.IM.Integration.Tests/ImServerFixture.cs b/tests/BuildFlow.IM.Integration.Tests/ImServerFixture.cs
index 40acd8f..87ba0ea 100644
--- a/tests/BuildFlow.IM.Integration.Tests/ImServerFixture.cs
+++ b/tests/BuildFlow.IM.Integration.Tests/ImServerFixture.cs
@@ -17,7 +17,6 @@ using BuildFlow.Shared.Infrastructure;
 using IM.Application.Chat.Commands;
 using IM.Domain.Common;
 using IM.Infrastructure.Cache;
-using IM.Infrastructure.Mongo;
 using IM.Infrastructure.Persistence;
 using StackExchange.Redis;