GermanApp/Domain/Entities/User.cs

@@ -1,78 +0,0 @@
-namespace GermanApp.Domain.Entities;
-
-/// <summary>
-/// Represents a user in the DeutschLernen system.
-/// </summary>
-public class User
-{
-    public int Id { get; private set; }
-    public string Username { get; private set; } = string.Empty;
-    public string Email { get; private set; } = string.Empty;
-    public string PasswordHash { get; private set; } = string.Empty;
-    public string CurrentLevel { get; private set; } = "A1";
-    public int Streak { get; private set; }
-    public int TotalPoints { get; private set; }
-    public DateTime CreatedAt { get; private set; }
-
-    /// <summary>
-    /// Constructor for EF Core deserialization.
-    /// </summary>
-    private User() { }
-
-    /// <summary>
-    /// Factory method to create a new user.
-    /// </summary>
-    public static User Create(string username, string email, string passwordHash)
-    {
-        return new User
-        {
-            Username = username,
-            Email = email.ToLowerInvariant(),
-            PasswordHash = passwordHash,
-            CurrentLevel = "A1",
-            Streak = 0,
-            TotalPoints = 0,
-            CreatedAt = DateTime.UtcNow
-        };
-    }
-
-    /// <summary>
-    /// Updates user's gamification stats.
-    /// </summary>
-    public void AddPoints(int points)
-    {
-        TotalPoints += points;
-    }
-
-    /// <summary>
-    /// Updates user's streak.
-    /// </summary>
-    public void UpdateStreak(int streak)
-    {
-        Streak = streak;
-    }
-
-    /// <summary>
-    /// Updates user's current level.
-    /// </summary>
-    public void UpdateLevel(string level)
-    {
-        CurrentLevel = level;
-    }
-
-    /// <summary>
-    /// Changes user's email.
-    /// </summary>
-    public void ChangeEmail(string newEmail)
-    {
-        Email = newEmail.ToLowerInvariant();
-    }
-
-    /// <summary>
-    /// Changes user's password hash.
-    /// </summary>
-    public void ChangePassword(string newPasswordHash)
-    {
-        PasswordHash = newPasswordHash;
-    }
-}

GermanApp/GermanApp.csproj

@@ -10,7 +10,7 @@
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.16" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.0" />
-    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
@@ -19,10 +19,6 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks" Version="9.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore" Version="9.0.0" />
-    <PackageReference Include="Serilog.AspNetCore" Version="8.0.0" />
-    <PackageReference Include="Serilog.Sinks.Console" Version="5.0.0" />
   </ItemGroup>
 
 </Project>

GermanApp/Infrastructure/Data/DbContext/AppDbContext.cs

@@ -15,7 +15,6 @@ public class AppDbContext : Microsoft.EntityFrameworkCore.DbContext
 
     // DbSets for domain entities
     public DbSet<Lesson> Lessons { get; set; } = null!;
-    public DbSet<User> Users { get; set; } = null!;
 
     // Note: Value objects are not stored directly as entities.
     // They are owned by entities and stored as part of the entity's data.
@@ -44,23 +43,6 @@ public class AppDbContext : Microsoft.EntityFrameworkCore.DbContext
             // });
         });
 
-        // Configure User entity
-        modelBuilder.Entity<User>(builder =>
-        {
-            builder.HasKey(u => u.Id);
-            builder.Property(u => u.Username).IsRequired().HasMaxLength(50);
-            builder.Property(u => u.Email).IsRequired().HasMaxLength(100);
-            builder.Property(u => u.PasswordHash).IsRequired().HasMaxLength(255);
-            builder.Property(u => u.CurrentLevel).HasMaxLength(10).HasDefaultValue("A1");
-            builder.Property(u => u.Streak).HasDefaultValue(0);
-            builder.Property(u => u.TotalPoints).HasDefaultValue(0);
-            builder.Property(u => u.CreatedAt).IsRequired();
-
-            // Ensure unique constraints
-            builder.HasIndex(u => u.Username).IsUnique();
-            builder.HasIndex(u => u.Email).IsUnique();
-        });
-
         // Seed data (optional) - Note: For EF Core, we need to set properties directly
         // In a real application, use migrations or a separate seeding mechanism
         // modelBuilder.Entity<Lesson>().HasData(

GermanApp/Infrastructure/Data/Migrations/20260531174249_InitialCreate.Designer.cs

@@ -1,116 +0,0 @@
-// <auto-generated />
-using System;
-using GermanApp.Infrastructure.Data.DbContext;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Infrastructure;
-using Microsoft.EntityFrameworkCore.Migrations;
-using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
-using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
-
-#nullable disable
-
-namespace GermanApp.Infrastructure.Data.Migrations
-{
-    [DbContext(typeof(AppDbContext))]
-    [Migration("20260531174249_InitialCreate")]
-    partial class InitialCreate
-    {
-        /// <inheritdoc />
-        protected override void BuildTargetModel(ModelBuilder modelBuilder)
-        {
-#pragma warning disable 612, 618
-            modelBuilder
-                .HasAnnotation("ProductVersion", "9.0.0")
-                .HasAnnotation("Relational:MaxIdentifierLength", 63);
-
-            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
-
-            modelBuilder.Entity("GermanApp.Domain.Entities.Lesson", b =>
-                {
-                    b.Property<int>("Id")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("integer");
-
-                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
-
-                    b.Property<DateTime>("CreatedAt")
-                        .HasColumnType("timestamp with time zone");
-
-                    b.Property<string>("Description")
-                        .IsRequired()
-                        .HasMaxLength(2000)
-                        .HasColumnType("character varying(2000)");
-
-                    b.Property<int>("Level")
-                        .HasColumnType("integer");
-
-                    b.Property<string>("Title")
-                        .IsRequired()
-                        .HasMaxLength(200)
-                        .HasColumnType("character varying(200)");
-
-                    b.Property<DateTime?>("UpdatedAt")
-                        .HasColumnType("timestamp with time zone");
-
-                    b.HasKey("Id");
-
-                    b.ToTable("Lessons");
-                });
-
-            modelBuilder.Entity("GermanApp.Domain.Entities.User", b =>
-                {
-                    b.Property<int>("Id")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("integer");
-
-                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
-
-                    b.Property<DateTime>("CreatedAt")
-                        .HasColumnType("timestamp with time zone");
-
-                    b.Property<string>("CurrentLevel")
-                        .IsRequired()
-                        .ValueGeneratedOnAdd()
-                        .HasMaxLength(10)
-                        .HasColumnType("character varying(10)")
-                        .HasDefaultValue("A1");
-
-                    b.Property<string>("Email")
-                        .IsRequired()
-                        .HasMaxLength(100)
-                        .HasColumnType("character varying(100)");
-
-                    b.Property<string>("PasswordHash")
-                        .IsRequired()
-                        .HasMaxLength(255)
-                        .HasColumnType("character varying(255)");
-
-                    b.Property<int>("Streak")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("integer")
-                        .HasDefaultValue(0);
-
-                    b.Property<int>("TotalPoints")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("integer")
-                        .HasDefaultValue(0);
-
-                    b.Property<string>("Username")
-                        .IsRequired()
-                        .HasMaxLength(50)
-                        .HasColumnType("character varying(50)");
-
-                    b.HasKey("Id");
-
-                    b.HasIndex("Email")
-                        .IsUnique();
-
-                    b.HasIndex("Username")
-                        .IsUnique();
-
-                    b.ToTable("Users");
-                });
-#pragma warning restore 612, 618
-        }
-    }
-}

GermanApp/Infrastructure/Data/Migrations/20260531174249_InitialCreate.cs

@@ -1,74 +0,0 @@
-using System;
-using Microsoft.EntityFrameworkCore.Migrations;
-using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
-
-#nullable disable
-
-namespace GermanApp.Infrastructure.Data.Migrations
-{
-    /// <inheritdoc />
-    public partial class InitialCreate : Migration
-    {
-        /// <inheritdoc />
-        protected override void Up(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.CreateTable(
-                name: "Lessons",
-                columns: table => new
-                {
-                    Id = table.Column<int>(type: "integer", nullable: false)
-                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
-                    Title = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: false),
-                    Description = table.Column<string>(type: "character varying(2000)", maxLength: 2000, nullable: false),
-                    Level = table.Column<int>(type: "integer", nullable: false),
-                    CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
-                    UpdatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: true)
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_Lessons", x => x.Id);
-                });
-
-            migrationBuilder.CreateTable(
-                name: "Users",
-                columns: table => new
-                {
-                    Id = table.Column<int>(type: "integer", nullable: false)
-                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
-                    Username = table.Column<string>(type: "character varying(50)", maxLength: 50, nullable: false),
-                    Email = table.Column<string>(type: "character varying(100)", maxLength: 100, nullable: false),
-                    PasswordHash = table.Column<string>(type: "character varying(255)", maxLength: 255, nullable: false),
-                    CurrentLevel = table.Column<string>(type: "character varying(10)", maxLength: 10, nullable: false, defaultValue: "A1"),
-                    Streak = table.Column<int>(type: "integer", nullable: false, defaultValue: 0),
-                    TotalPoints = table.Column<int>(type: "integer", nullable: false, defaultValue: 0),
-                    CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false)
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_Users", x => x.Id);
-                });
-
-            migrationBuilder.CreateIndex(
-                name: "IX_Users_Email",
-                table: "Users",
-                column: "Email",
-                unique: true);
-
-            migrationBuilder.CreateIndex(
-                name: "IX_Users_Username",
-                table: "Users",
-                column: "Username",
-                unique: true);
-        }
-
-        /// <inheritdoc />
-        protected override void Down(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.DropTable(
-                name: "Lessons");
-
-            migrationBuilder.DropTable(
-                name: "Users");
-        }
-    }
-}

GermanApp/Infrastructure/Data/Migrations/AppDbContextModelSnapshot.cs

@@ -1,113 +0,0 @@
-// <auto-generated />
-using System;
-using GermanApp.Infrastructure.Data.DbContext;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Infrastructure;
-using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
-using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
-
-#nullable disable
-
-namespace GermanApp.Migrations
-{
-    [DbContext(typeof(AppDbContext))]
-    partial class AppDbContextModelSnapshot : ModelSnapshot
-    {
-        protected override void BuildModel(ModelBuilder modelBuilder)
-        {
-#pragma warning disable 612, 618
-            modelBuilder
-                .HasAnnotation("ProductVersion", "9.0.0")
-                .HasAnnotation("Relational:MaxIdentifierLength", 63);
-
-            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
-
-            modelBuilder.Entity("GermanApp.Domain.Entities.Lesson", b =>
-                {
-                    b.Property<int>("Id")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("integer");
-
-                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
-
-                    b.Property<DateTime>("CreatedAt")
-                        .HasColumnType("timestamp with time zone");
-
-                    b.Property<string>("Description")
-                        .IsRequired()
-                        .HasMaxLength(2000)
-                        .HasColumnType("character varying(2000)");
-
-                    b.Property<int>("Level")
-                        .HasColumnType("integer");
-
-                    b.Property<string>("Title")
-                        .IsRequired()
-                        .HasMaxLength(200)
-                        .HasColumnType("character varying(200)");
-
-                    b.Property<DateTime?>("UpdatedAt")
-                        .HasColumnType("timestamp with time zone");
-
-                    b.HasKey("Id");
-
-                    b.ToTable("Lessons");
-                });
-
-            modelBuilder.Entity("GermanApp.Domain.Entities.User", b =>
-                {
-                    b.Property<int>("Id")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("integer");
-
-                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
-
-                    b.Property<DateTime>("CreatedAt")
-                        .HasColumnType("timestamp with time zone");
-
-                    b.Property<string>("CurrentLevel")
-                        .IsRequired()
-                        .ValueGeneratedOnAdd()
-                        .HasMaxLength(10)
-                        .HasColumnType("character varying(10)")
-                        .HasDefaultValue("A1");
-
-                    b.Property<string>("Email")
-                        .IsRequired()
-                        .HasMaxLength(100)
-                        .HasColumnType("character varying(100)");
-
-                    b.Property<string>("PasswordHash")
-                        .IsRequired()
-                        .HasMaxLength(255)
-                        .HasColumnType("character varying(255)");
-
-                    b.Property<int>("Streak")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("integer")
-                        .HasDefaultValue(0);
-
-                    b.Property<int>("TotalPoints")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("integer")
-                        .HasDefaultValue(0);
-
-                    b.Property<string>("Username")
-                        .IsRequired()
-                        .HasMaxLength(50)
-                        .HasColumnType("character varying(50)");
-
-                    b.HasKey("Id");
-
-                    b.HasIndex("Email")
-                        .IsUnique();
-
-                    b.HasIndex("Username")
-                        .IsUnique();
-
-                    b.ToTable("Users");
-                });
-#pragma warning restore 612, 618
-        }
-    }
-}

GermanApp/Infrastructure/Data/SeedData/SeedDataExtension.cs

@@ -1,60 +0,0 @@
-using GermanApp.Domain.Entities;
-using GermanApp.Infrastructure.Data.DbContext;
-using Microsoft.EntityFrameworkCore;
-
-namespace GermanApp.Infrastructure.Data.SeedData;
-
-/// <summary>
-/// Extension methods for seeding the database.
-/// </summary>
-public static class SeedDataExtension
-{
-    /// <summary>
-    /// Seeds the database with initial data.
-    /// </summary>
-    /// <param name="app">The web application</param>
-    public static void SeedDatabase(this WebApplication app)
-    {
-        using var scope = app.Services.CreateScope();
-        var dbContext = scope.ServiceProvider.GetRequiredService<AppDbContext>();
-
-        // Apply pending migrations
-        dbContext.Database.Migrate();
-
-        // Only seed if there are no users
-        if (!dbContext.Users.Any())
-        {
-            // Seed an admin user
-            var adminUser = User.Create(
-                "admin",
-                "admin@deutschlernen.com",
-                "$2a$11$N9qo8uLOickgx2ZMRZoMy.Mrq9Hq4yVJyX2sX7z3J0J9z6J9Z2K4a" // bcrypt hash of "Admin@123!"
-            );
-            adminUser.UpdateLevel("C1");
-            dbContext.Users.Add(adminUser);
-
-            // Seed a test user
-            var testUser = User.Create(
-                "testuser",
-                "test@deutschlernen.com",
-                "$2a$11$N9qo8uLOickgx2ZMRZoMy.Mrq9Hq4yVJyX2sX7z3J0J9z6J9Z2K4a" // bcrypt hash of "Test@123!"
-            );
-            dbContext.Users.Add(testUser);
-
-            // Seed some lessons
-            var lessons = new[]
-            {
-                Lesson.Create("Greetings", "Basic German greetings and introductions", 1),
-                Lesson.Create("Numbers", "German numbers 1-100", 1),
-                Lesson.Create("Grammar Basics", "Basic German grammar rules", 2),
-                Lesson.Create("Everyday Phrases", "Common phrases for daily conversations", 2),
-                Lesson.Create("Advanced Grammar", "Complex German grammar", 4)
-            };
-            dbContext.Lessons.AddRange(lessons);
-
-            dbContext.SaveChanges();
-
-            Console.WriteLine("Database seeded with admin user, test user, and sample lessons.");
-        }
-    }
-}

GermanApp/Program.cs

@@ -3,64 +3,25 @@ using GermanApp.Application.UseCases.Commands;
 using GermanApp.Domain.Interfaces;
 using GermanApp.Infrastructure.Data.DbContext;
 using GermanApp.Infrastructure.Data.Repositories;
-using GermanApp.Infrastructure.Data.SeedData;
 using GermanApp.Presentation.Endpoints;
-using GermanApp.Shared.Middleware;
 using Microsoft.EntityFrameworkCore;
-using Serilog;
 
-// Configure Serilog
-Log.Logger = new LoggerConfiguration()
-    .MinimumLevel.Debug()
-    .WriteTo.Console()
-    .CreateBootstrapLogger();
-
-try
-{
 var builder = WebApplication.CreateBuilder(args);
 
-    // Add Serilog to the builder
-    builder.Host.UseSerilog((ctx, lc) => lc
-        .MinimumLevel.Debug()
-        .WriteTo.Console()
-        .ReadFrom.Configuration(ctx.Configuration));
-
-    // ============================================
-    // PRESENTATION LAYER - API Configuration
-    // ============================================
-
 // Add services to the container.
+// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
 builder.Services.AddOpenApi();
 
-    // Add Health Checks
-    builder.Services.AddHealthChecks()
-        .AddDbContextCheck<AppDbContext>();
-
-    // Configure CORS
-    builder.Services.AddCors(options =>
-    {
-        options.AddPolicy("AllowAll", builder =>
-        {
-            builder.AllowAnyOrigin()
-                   .AllowAnyMethod()
-                   .AllowAnyHeader();
-        });
-    });
-
-    // Add services for Minimal APIs
-    builder.Services.AddEndpointsApiExplorer();
-    builder.Services.AddSwaggerGen();
-
 // ============================================
 // INFRASTRUCTURE LAYER - Database & External Services
 // ============================================
 
-    // Add DbContext with PostgreSQL
+// Add DbContext with SQLite (can be changed to SQL Server, PostgreSQL, etc.)
 builder.Services.AddDbContext<AppDbContext>(options =>
 {
-        // Using PostgreSQL for production and development
+    // Using SQLite for development - configure in appsettings.json for production
-        options.UseNpgsql(builder.Configuration.GetConnectionString("DefaultConnection") 
+    options.UseSqlite(builder.Configuration.GetConnectionString("DefaultConnection") 
-            ?? "Host=localhost;Port=5432;Database=DeutschLernen;Username=postgres;Password=postgres");
+        ?? "Data Source=germanapp.db");
     
     // Enable sensitive data logging in development
     if (builder.Environment.IsDevelopment())
@@ -80,13 +41,17 @@ try
 // Register command handlers
 builder.Services.AddScoped<ICommandHandler<CreateLessonCommand, LessonDto>, CreateLessonCommandHandler>();
 
+// ============================================
+// PRESENTATION LAYER - API
+// ============================================
+
+// Add services for Minimal APIs
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
 var app = builder.Build();
 
 // Configure the HTTP request pipeline.
-    
-    // Use exception middleware first (to catch all exceptions)
-    app.UseExceptionMiddleware();
-
 if (app.Environment.IsDevelopment())
 {
     app.MapOpenApi();
@@ -94,14 +59,13 @@ try
     app.UseSwaggerUI();
 }
 
-    // Use CORS
+// Initialize database (in development)
-    app.UseCors("AllowAll");
+if (app.Environment.IsDevelopment())
-
+{
-    // Use Health Checks
+    using var scope = app.Services.CreateScope();
-    app.MapHealthChecks("/health");
+    var dbContext = scope.ServiceProvider.GetRequiredService<AppDbContext>();
-
+    dbContext.Database.EnsureCreated();
-    // Seed database with initial data
+}
-    app.SeedDatabase();
 
 // Map Clean Architecture endpoints
 app.MapLessonsEndpoints();
@@ -127,15 +91,6 @@ try
 .WithName("GetWeatherForecast");
 
 app.Run();
-}
-catch (Exception ex)
-{
-    Log.Fatal(ex, "Application terminated unexpectedly");
-}
-finally
-{
-    Log.CloseAndFlush();
-}
 
 // Existing record for reference
 record WeatherForecast(DateOnly Date, int TemperatureC, string? Summary)

GermanApp/Shared/Middleware/ExceptionMiddleware.cs

@@ -1,62 +0,0 @@
-using System.Net;
-using System.Text.Json;
-using GermanApp.Shared.Models;
-
-namespace GermanApp.Shared.Middleware;
-
-/// <summary>
-/// Global exception handling middleware.
-/// Catches exceptions and returns consistent error responses.
-/// </summary>
-public class ExceptionMiddleware
-{
-    private readonly RequestDelegate _next;
-    private readonly ILogger<ExceptionMiddleware> _logger;
-
-    public ExceptionMiddleware(RequestDelegate next, ILogger<ExceptionMiddleware> logger)
-    {
-        _next = next;
-        _logger = logger;
-    }
-
-    public async Task InvokeAsync(HttpContext httpContext)
-    {
-        try
-        {
-            await _next(httpContext);
-        }
-        catch (Exception ex)
-        {
-            _logger.LogError(ex, "Unhandled exception occurred: {Message}", ex.Message);
-            await HandleExceptionAsync(httpContext, ex);
-        }
-    }
-
-    private static Task HandleExceptionAsync(HttpContext context, Exception exception)
-    {
-        context.Response.ContentType = "application/json";
-        context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
-
-        var response = new ApiErrorResponse(
-            "An unexpected error occurred. Please try again later.",
-            context.Response.StatusCode,
-            exception.Message
-        );
-
-        var options = new JsonSerializerOptions
-        {
-            PropertyNamingPolicy = JsonNamingPolicy.CamelCase
-        };
-
-        return context.Response.WriteAsync(JsonSerializer.Serialize(response, options));
-    }
-}
-
-/// <summary>
-/// Extension method to add exception middleware.
-/// </summary>
-public static class ExceptionMiddlewareExtensions
-{
-    public static IApplicationBuilder UseExceptionMiddleware(this IApplicationBuilder builder) =>
-        builder.UseMiddleware<ExceptionMiddleware>();
-}

GermanApp/Shared/Models/ApiResponse.cs

@@ -1,47 +0,0 @@
-namespace GermanApp.Shared.Models;
-
-/// <summary>
-/// Base API response wrapper for consistent API responses.
-/// </summary>
-/// <typeparam name="T">The data type of the response</typeparam>
-public record ApiResponse<T>(T Data, string Message = "Success", bool Success = true)
-{
-    /// <summary>
-    /// Creates a successful response.
-    /// </summary>
-    public static ApiResponse<T> Ok(T data, string message = "Success") =>
-        new ApiResponse<T>(data, message, true);
-}
-
-/// <summary>
-/// API error response for consistent error handling.
-/// </summary>
-public record ApiErrorResponse(string Message, int StatusCode, string? Details = null)
-{
-    public bool Success => false;
-
-    /// <summary>
-    /// Creates an error response.
-    /// </summary>
-    public static ApiErrorResponse Error(string message, int statusCode, string? details = null) =>
-        new ApiErrorResponse(message, statusCode, details);
-}
-
-/// <summary>
-/// Paginated API response.
-/// </summary>
-/// <typeparam name="T">The data type of the items</typeparam>
-public record PaginatedResponse<T>(IEnumerable<T> Items, int PageNumber, int PageSize, int TotalCount, int TotalPages)
-{
-    /// <summary>
-    /// Creates a paginated response.
-    /// </summary>
-    public static PaginatedResponse<T> Create(IEnumerable<T> items, int pageNumber, int pageSize, int totalCount) =>
-        new PaginatedResponse<T>(
-            items,
-            pageNumber,
-            pageSize,
-            totalCount,
-            (int)Math.Ceiling(totalCount / (double)pageSize)
-        );
-}

GermanApp/appsettings.Development.json

@@ -1,11 +1,8 @@
 {
   "Logging": {
     "LogLevel": {
-      "Default": "Debug",
+      "Default": "Information",
-      "Microsoft.AspNetCore": "Information"
+      "Microsoft.AspNetCore": "Warning"
-    }
+    }
-  },
-  "ConnectionStrings": {
-    "DefaultConnection": "Host=localhost;Port=5432;Database=DeutschLernen;Username=postgres;Password=postgres"
   }
 }

GermanApp/appsettings.Production.json

@@ -1,11 +0,0 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Warning",
-      "Microsoft.AspNetCore": "Error"
-    }
-  },
-  "ConnectionStrings": {
-    "DefaultConnection": "Host=prod-db;Port=5432;Database=DeutschLernen;Username=postgres;Password=${DB_PASSWORD}"
-  }
-}

GermanApp/appsettings.Staging.json

@@ -1,11 +0,0 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  },
-  "ConnectionStrings": {
-    "DefaultConnection": "Host=staging-db;Port=5432;Database=DeutschLernen;Username=postgres;Password=${DB_PASSWORD}"
-  }
-}

GermanApp/appsettings.json

@@ -5,8 +5,5 @@
       "Microsoft.AspNetCore": "Warning"
     }
   },
-  "AllowedHosts": "*",
+  "AllowedHosts": "*"
-  "ConnectionStrings": {
-    "DefaultConnection": "Host=localhost;Port=5432;Database=DeutschLernen;Username=postgres;Password=postgres"
-  }
 }

docs/features/infrastructure-setup.md

@@ -1,6 +1,6 @@
 # Feature: Infrastructure Setup
 
-> **Status**: 🚀 In Progress  
+> **Status**: ⏳ Planned  
 > **Priority**: High  
 > **Complexity**: Medium  
 > **Estimate**: 10-14 hours