feat(backend): Add ProjectManagement integration test infrastructure + fix API controller

Created comprehensive integration test infrastructure for ProjectManagement module:
- PMWebApplicationFactory with in-memory database support
- TestAuthHelper for JWT token generation
- Test project with all necessary dependencies

Fixed API Controller:
- Removed manual TenantId injection in ProjectsController
- TenantId now automatically extracted via ITenantContext in CommandHandler
- Maintained OwnerId extraction from JWT claims

Test Infrastructure:
- In-memory database for fast, isolated tests
- Support for multi-tenant scenarios
- JWT authentication helpers
- Cross-module database consistency

Next Steps:
- Write multi-tenant isolation tests (Phase 3.2)
- Write CRUD integration tests (Phase 3.3)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

colaflow-api/src/ColaFlow.API/Controllers/ProjectsController.cs

@@ -57,14 +57,13 @@ public class ProjectsController(IMediator mediator) : ControllerBase
         [FromBody] CreateProjectCommand command,
         CancellationToken cancellationToken = default)
     {
-        // Extract TenantId and UserId from JWT claims
-        var tenantId = GetTenantIdFromClaims();
+        // Extract UserId from JWT claims
+        // Note: TenantId is now automatically extracted in the CommandHandler via ITenantContext
         var userId = GetUserIdFromClaims();
 
-        // Override command with authenticated user's context
+        // Override command with authenticated user's ID
         var commandWithContext = command with
         {
-            TenantId = tenantId,
             OwnerId = userId
         };
 
@@ -104,15 +103,7 @@ public class ProjectsController(IMediator mediator) : ControllerBase
         return NoContent();
     }
 
-    // Helper methods to extract claims
-    private Guid GetTenantIdFromClaims()
-    {
-        var tenantIdClaim = User.FindFirst("tenant_id")?.Value
-            ?? throw new UnauthorizedAccessException("Tenant ID not found in token");
-
-        return Guid.Parse(tenantIdClaim);
-    }
-
+    // Helper method to extract user ID from claims
     private Guid GetUserIdFromClaims()
     {
         var userIdClaim = User.FindFirst(ClaimTypes.NameIdentifier)?.Value

colaflow-api/tests/Modules/ProjectManagement/ColaFlow.Modules.ProjectManagement.IntegrationTests/ColaFlow.Modules.ProjectManagement.IntegrationTests.csproj

@@ -0,0 +1,49 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.2" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+
+    <!-- Web Application Factory for Integration Testing -->
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.0" />
+
+    <!-- Database Providers -->
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="9.0.0" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.4" />
+
+    <!-- Assertion Library -->
+    <PackageReference Include="FluentAssertions" Version="7.0.0" />
+
+    <!-- JWT Token Handling -->
+    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.14.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <!-- Reference API Project -->
+    <ProjectReference Include="..\..\..\..\src\ColaFlow.API\ColaFlow.API.csproj" />
+
+    <!-- Reference ProjectManagement Module -->
+    <ProjectReference Include="..\..\..\..\src\Modules\ProjectManagement\ColaFlow.Modules.ProjectManagement.Application\ColaFlow.Modules.ProjectManagement.Application.csproj" />
+    <ProjectReference Include="..\..\..\..\src\Modules\ProjectManagement\ColaFlow.Modules.ProjectManagement.Infrastructure\ColaFlow.Modules.ProjectManagement.Infrastructure.csproj" />
+    <ProjectReference Include="..\..\..\..\src\Modules\ProjectManagement\ColaFlow.Modules.ProjectManagement.Domain\ColaFlow.Modules.ProjectManagement.Domain.csproj" />
+
+    <!-- Reference Identity Module (for auth) -->
+    <ProjectReference Include="..\..\..\..\src\Modules\Identity\ColaFlow.Modules.Identity.Application\ColaFlow.Modules.Identity.Application.csproj" />
+    <ProjectReference Include="..\..\..\..\src\Modules\Identity\ColaFlow.Modules.Identity.Infrastructure\ColaFlow.Modules.Identity.Infrastructure.csproj" />
+    <ProjectReference Include="..\..\..\..\src\Modules\Identity\ColaFlow.Modules.Identity.Domain\ColaFlow.Modules.Identity.Domain.csproj" />
+  </ItemGroup>
+
+</Project>

colaflow-api/tests/Modules/ProjectManagement/ColaFlow.Modules.ProjectManagement.IntegrationTests/Infrastructure/PMWebApplicationFactory.cs

@@ -0,0 +1,100 @@
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using ColaFlow.Modules.Identity.Infrastructure.Persistence;
+using ColaFlow.Modules.IssueManagement.Infrastructure.Persistence;
+using ColaFlow.Modules.ProjectManagement.Infrastructure.Persistence;
+
+namespace ColaFlow.Modules.ProjectManagement.IntegrationTests.Infrastructure;
+
+/// <summary>
+/// Custom WebApplicationFactory for ProjectManagement Integration Tests
+/// Supports In-Memory database for fast, isolated tests
+/// </summary>
+public class PMWebApplicationFactory : WebApplicationFactory<Program>
+{
+    private readonly string _testDatabaseName = $"PMTestDb_{Guid.NewGuid()}";
+
+    protected override void ConfigureWebHost(IWebHostBuilder builder)
+    {
+        // Set environment to Testing
+        builder.UseEnvironment("Testing");
+
+        // Configure test-specific settings
+        builder.ConfigureAppConfiguration((context, config) =>
+        {
+            // Clear existing connection strings to prevent PostgreSQL registration
+            config.Sources.Clear();
+
+            // Add minimal config for testing
+            config.AddInMemoryCollection(new Dictionary<string, string?>
+            {
+                ["ConnectionStrings:DefaultConnection"] = "",
+                ["ConnectionStrings:PMDatabase"] = "",
+                ["ConnectionStrings:IMDatabase"] = "",
+                ["Jwt:SecretKey"] = "test-secret-key-for-integration-tests-minimum-32-characters",
+                ["Jwt:Issuer"] = "ColaFlow.Test",
+                ["Jwt:Audience"] = "ColaFlow.Test",
+                ["Jwt:AccessTokenExpirationMinutes"] = "15",
+                ["Jwt:RefreshTokenExpirationDays"] = "7"
+            });
+        });
+
+        builder.ConfigureServices(services =>
+        {
+            // Register test databases with In-Memory provider
+            // Use the same database name for cross-context data consistency
+            services.AddDbContext<IdentityDbContext>(options =>
+            {
+                options.UseInMemoryDatabase(_testDatabaseName);
+                options.EnableSensitiveDataLogging();
+            });
+
+            services.AddDbContext<PMDbContext>(options =>
+            {
+                options.UseInMemoryDatabase(_testDatabaseName);
+                options.EnableSensitiveDataLogging();
+            });
+
+            services.AddDbContext<IssueManagementDbContext>(options =>
+            {
+                options.UseInMemoryDatabase(_testDatabaseName);
+                options.EnableSensitiveDataLogging();
+            });
+        });
+    }
+
+    protected override IHost CreateHost(IHostBuilder builder)
+    {
+        var host = base.CreateHost(builder);
+
+        // Initialize databases after host is created
+        using var scope = host.Services.CreateScope();
+        var services = scope.ServiceProvider;
+
+        try
+        {
+            // Initialize Identity database
+            var identityDb = services.GetRequiredService<IdentityDbContext>();
+            identityDb.Database.EnsureCreated();
+
+            // Initialize ProjectManagement database
+            var pmDb = services.GetRequiredService<PMDbContext>();
+            pmDb.Database.EnsureCreated();
+
+            // Initialize IssueManagement database
+            var imDb = services.GetRequiredService<IssueManagementDbContext>();
+            imDb.Database.EnsureCreated();
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"Error initializing test database: {ex.Message}");
+            throw;
+        }
+
+        return host;
+    }
+}

colaflow-api/tests/Modules/ProjectManagement/ColaFlow.Modules.ProjectManagement.IntegrationTests/Infrastructure/TestAuthHelper.cs

@@ -0,0 +1,57 @@
+using System.IdentityModel.Tokens.Jwt;
+using System.Net.Http.Headers;
+using System.Security.Claims;
+using System.Text;
+using Microsoft.IdentityModel.Tokens;
+
+namespace ColaFlow.Modules.ProjectManagement.IntegrationTests.Infrastructure;
+
+/// <summary>
+/// Helper class for generating JWT tokens in tests
+/// </summary>
+public static class TestAuthHelper
+{
+    private const string SecretKey = "test-secret-key-for-integration-tests-minimum-32-characters";
+    private const string Issuer = "ColaFlow.Test";
+    private const string Audience = "ColaFlow.Test";
+
+    public static string GenerateJwtToken(Guid userId, Guid tenantId, string tenantSlug, string email, string role = "Member")
+    {
+        var tokenHandler = new JwtSecurityTokenHandler();
+        var key = Encoding.UTF8.GetBytes(SecretKey);
+
+        var tokenDescriptor = new SecurityTokenDescriptor
+        {
+            Subject = new ClaimsIdentity(new[]
+            {
+                new Claim(ClaimTypes.NameIdentifier, userId.ToString()),
+                new Claim("sub", userId.ToString()),
+                new Claim("tenant_id", tenantId.ToString()),
+                new Claim("tenantId", tenantId.ToString()),
+                new Claim("tenantSlug", tenantSlug),
+                new Claim("email", email),
+                new Claim("role", role)
+            }),
+            Expires = DateTime.UtcNow.AddHours(1),
+            Issuer = Issuer,
+            Audience = Audience,
+            SigningCredentials = new SigningCredentials(
+                new SymmetricSecurityKey(key),
+                SecurityAlgorithms.HmacSha256Signature)
+        };
+
+        var token = tokenHandler.CreateToken(tokenDescriptor);
+        return tokenHandler.WriteToken(token);
+    }
+
+    public static void AddAuthHeader(this HttpClient client, string token)
+    {
+        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
+    }
+
+    public static void AddAuthHeader(this HttpClient client, Guid userId, Guid tenantId, string tenantSlug, string email, string role = "Member")
+    {
+        var token = GenerateJwtToken(userId, tenantId, tenantSlug, email, role);
+        client.AddAuthHeader(token);
+    }
+}