refactor: decompose LauncherApp, centralize magic strings/constants, configurable colors

- Extract InputController from AppHost (key handling + ReloadGameEntries)
- Centralize hardcoded values as code constants (non-configurable):
  FavoritesRootName, DefaultFileName, DefaultTitle, scroll fractions,
  AvailableLines helper, removed redundant ArgsTemplate fallback
- Make color scheme configurable via 'Colors' section in launcher.config.json
  with Enum.TryParse + default fallback; MenuRenderer uses constructor injection
- Clean up MenuRenderer: remove dead maxRow logic, unify cache sizing via EnsureCache
- Document intentional error swallowing in FavoritesService.Save/UIErrorService
- Update README + AGENTS.md with configurable color docs
- Remove redundant ArgsTemplate fallback (config is single source of truth)

src/MarcerGameDvdLauncher/AppConfiguration.cs

@@ -4,6 +4,25 @@
 namespace MarcerGameDvdLauncher
 {
     // Configuration POCOs separated into their own file for clarity
+
+    /// <summary>
+    /// Color configuration for the menu renderer.
+    /// All properties have default values matching the original hardcoded scheme,
+    /// so omitting any value (or the entire "Colors" section) preserves existing behaviour.
+    /// </summary>
+    public class AppColorConfig
+    {
+        public ConsoleColor FolderBoth { get; set; } = ConsoleColor.Yellow;
+        public ConsoleColor FolderPatchOnly { get; set; } = ConsoleColor.DarkYellow;
+        public ConsoleColor FolderRootOnly { get; set; } = ConsoleColor.Gray;
+        public ConsoleColor ZipBoth { get; set; } = ConsoleColor.Green;
+        public ConsoleColor ZipRootOnly { get; set; } = ConsoleColor.DarkGreen;
+        public ConsoleColor ZipPatchOnly { get; set; } = ConsoleColor.Magenta;
+        public ConsoleColor SelectedForeground { get; set; } = ConsoleColor.Black;
+        public ConsoleColor SelectedBackground { get; set; } = ConsoleColor.DarkCyan;
+        public ConsoleColor VirtualEntry { get; set; } = ConsoleColor.White;
+    }
+
     public class AppHatariConfig
     {
         public string? Executable { get; set; }
@@ -16,5 +35,9 @@ namespace MarcerGameDvdLauncher
         public string? RootDirectory { get; set; }
         public string? PatchDirectory { get; set; }
         public AppHatariConfig? Hatari { get; set; }
+        // Ignored during JSON deserialization — parsed manually in LoadConfiguration so that
+        // invalid color strings fall back to defaults instead of throwing.
+        [System.Text.Json.Serialization.JsonIgnore]
+        public AppColorConfig? Colors { get; set; }
     }
 }

src/MarcerGameDvdLauncher/FavoritesService.cs

@@ -6,6 +6,14 @@ namespace MarcerGameDvdLauncher
     // Manages loading, saving and querying favorite ZIP paths.
     public class FavoritesService
     {
+        // Virtual folder name displayed at the root when favorites exist.
+        // Not configurable — fixed UI element.
+        public const string FavoritesRootName = "Favorites";
+
+        // Filename used for persisting favorites to disk.
+        // Not configurable — fixed persistence file.
+        public const string DefaultFileName = "favorites.txt";
+
         private readonly string _filePath;
         // Use a SortedSet so favorites are kept in sorted order in memory.
         private SortedSet<string> _favorites = new(StringComparer.OrdinalIgnoreCase);
@@ -87,7 +95,11 @@ namespace MarcerGameDvdLauncher
             }
             catch
             {
-                // Let callers surface errors (we swallow here to avoid throwing on write failures during UI operations)
+                // Swallowed intentionally ("bewusst still"): a persistence failure
+                // (e.g. disk full, read-only directory) must not crash or interrupt
+                // the UI. The in-memory state is still updated so the user sees
+                // immediate feedback; only the on-disk write is lost. On next
+                // application start the favorites reflect the last successful save.
             }
         }
     }

src/MarcerGameDvdLauncher/InputController.cs

@@ -0,0 +1,255 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading;
+
+namespace MarcerGameDvdLauncher
+{
+    /// <summary>
+    /// Handles user input (key events) and the associated navigation / drawing logic.
+    /// Extracted from AppHost so that LauncherApp stays focused on lifecycle management.
+    /// No functional change - all key-handling behaviour is preserved exactly.
+    /// </summary>
+    internal class InputController
+    {
+        private readonly OverlayDirectoryBrowser _directoryBrowser;
+        private readonly MenuRenderer _menuRenderer;
+        private readonly NavigationController _navigationController;
+        private readonly HatariLauncher _hatariLauncher;
+        private readonly FavoritesService _favoritesService;
+        private readonly UIErrorService _errorService;
+
+        private List<GameEntry> _gameEntries = new();
+
+        public IReadOnlyList<GameEntry> GameEntries => _gameEntries;
+
+        public InputController(OverlayDirectoryBrowser directoryBrowser, MenuRenderer menuRenderer,
+            NavigationController navigationController, HatariLauncher hatariLauncher,
+            FavoritesService favoritesService, UIErrorService errorService)
+        {
+            _directoryBrowser = directoryBrowser;
+            _menuRenderer = menuRenderer;
+            _navigationController = navigationController;
+            _hatariLauncher = hatariLauncher;
+            _favoritesService = favoritesService;
+            _errorService = errorService;
+        }
+
+        private bool IsFavorite(GameEntry e)
+        {
+            return e.Kind == EntryKind.Zip
+                ? _favoritesService.IsFavorite(e.InPatch ? e.PatchPath : e.RootPath)
+                : false;
+        }
+
+        private void DrawMenu(int availableLines)
+        {
+            _menuRenderer.DrawMenu(_gameEntries, _navigationController.ScrollOffset,
+                _navigationController.SelectedIndex, availableLines, IsFavorite);
+        }
+
+        /// <summary>
+        /// Updates scroll offset and redraws the full menu. Called on initial load and console resize.
+        /// </summary>
+        public void RefreshView(int availableLines)
+        {
+            _navigationController.UpdateScrollOffset(_gameEntries.Count, availableLines);
+            DrawMenu(availableLines);
+        }
+
+        /// <summary>
+        /// Loads entries for the current directory (or the virtual Favorites folder).
+        /// </summary>
+        public void ReloadGameEntries()
+        {
+            try
+            {
+                // If we are at the virtual Favorites folder, produce the flat list from the favorites service
+                if (string.Equals(_navigationController.CurrentRelativePath, FavoritesService.FavoritesRootName, StringComparison.OrdinalIgnoreCase))
+                {
+                    var favs = _favoritesService.GetAll();
+                    _gameEntries = new List<GameEntry>();
+                    foreach (var p in favs)
+                    {
+                        _gameEntries.Add(new GameEntry
+                        {
+                            Name = Path.GetFileName(p),
+                            Kind = EntryKind.Zip,
+                            InRoot = true,
+                            InPatch = false,
+                            RootPath = p,
+                            PatchPath = string.Empty,
+                            IsVirtual = false
+                        });
+                    }
+                    _navigationController.SetEntriesCount(_gameEntries.Count);
+                    return;
+                }
+
+                // Otherwise use the overlay directory browser for normal folders
+                _gameEntries = _directoryBrowser.GetEntries(_navigationController.CurrentRelativePath);
+
+                // If we are at the root and there are favorites, prepend a virtual Favorites folder
+                if (string.IsNullOrEmpty(_navigationController.CurrentRelativePath) && _favoritesService.HasFavorites())
+                {
+                    var virtualEntry = new GameEntry
+                    {
+                        Name = FavoritesService.FavoritesRootName,
+                        Kind = EntryKind.Directory,
+                        InRoot = true,
+                        InPatch = false,
+                        RootPath = string.Empty,
+                        PatchPath = string.Empty,
+                        IsVirtual = true
+                    };
+                    _gameEntries.Insert(0, virtualEntry);
+                }
+
+                _navigationController.SetEntriesCount(_gameEntries.Count);
+            }
+            catch (Exception ex)
+            {
+                // Show the error to the user and continue with an empty list
+                _errorService.ShowError(ex.Message);
+                _gameEntries = new List<GameEntry>();
+                _navigationController.SetEntriesCount(0);
+            }
+        }
+
+        /// <summary>
+        /// Handles a key press. Returns true if the application should exit.
+        /// </summary>
+        public bool HandleKey(ConsoleKeyInfo key, int availableLines)
+        {
+            if (key.KeyChar == '?')
+            {
+                _menuRenderer.ShowHelpBox(availableLines);
+                Console.ReadKey(intercept: true);
+                _menuRenderer.InvalidateCache();
+                DrawMenu(availableLines);
+                ProgramHelpers.FlushInputBuffer();
+                return false;
+            }
+
+            switch (key.Key)
+            {
+                case ConsoleKey.UpArrow:
+                    {
+                        int previousSelectedIndex = _navigationController.SelectedIndex;
+                        bool didScroll = _navigationController.MoveUp(_gameEntries, availableLines);
+                        if (didScroll)
+                        {
+                            DrawMenu(availableLines);
+                        }
+                        else
+                        {
+                            _menuRenderer.RedrawEntry(_gameEntries, previousSelectedIndex, previousSelectedIndex - _navigationController.ScrollOffset, false, availableLines, IsFavorite);
+                            _menuRenderer.RedrawEntry(_gameEntries, _navigationController.SelectedIndex, _navigationController.SelectedIndex - _navigationController.ScrollOffset, true, availableLines, IsFavorite);
+                        }
+                        // flush input to avoid key repeat
+                        ProgramHelpers.FlushInputBuffer();
+                    }
+                    break;
+                case ConsoleKey.DownArrow:
+                    {
+                        int previousSelectedIndex = _navigationController.SelectedIndex;
+                        bool didScroll = _navigationController.MoveDown(_gameEntries, availableLines);
+                        if (didScroll)
+                        {
+                            DrawMenu(availableLines);
+                        }
+                        else
+                        {
+                            _menuRenderer.RedrawEntry(_gameEntries, previousSelectedIndex, previousSelectedIndex - _navigationController.ScrollOffset, false, availableLines, IsFavorite);
+                            _menuRenderer.RedrawEntry(_gameEntries, _navigationController.SelectedIndex, _navigationController.SelectedIndex - _navigationController.ScrollOffset, true, availableLines, IsFavorite);
+                        }
+                        ProgramHelpers.FlushInputBuffer();
+                    }
+                    break;
+                case ConsoleKey.Enter:
+                case ConsoleKey.RightArrow:
+                    {
+                        var oldRelativePath = _navigationController.CurrentRelativePath;
+                        var isDirectory = _gameEntries.Count > 0 && _gameEntries[_navigationController.SelectedIndex].Kind == EntryKind.Directory;
+                        _navigationController.HandleEnter(_gameEntries);
+                        if (isDirectory && oldRelativePath != _navigationController.CurrentRelativePath)
+                        {
+                            ReloadGameEntries();
+                            _navigationController.UpdateScrollOffset(_gameEntries.Count, availableLines);
+                        }
+                        DrawMenu(availableLines);
+                        // Only start a ZIP if NOT switching to a directory
+                        if (!isDirectory && _gameEntries.Count > 0 && _gameEntries[_navigationController.SelectedIndex].Kind == EntryKind.Zip)
+                        {
+                            string zipToLaunch = _gameEntries[_navigationController.SelectedIndex].InPatch ? _gameEntries[_navigationController.SelectedIndex].PatchPath : _gameEntries[_navigationController.SelectedIndex].RootPath;
+                            try
+                            {
+                                _hatariLauncher.Launch(zipToLaunch);
+                            }
+                            catch (Exception ex)
+                            {
+                                _errorService.ShowError(ex.Message);
+                            }
+                        }
+                        // flush input to avoid leftover key events after an enter/navigation
+                        ProgramHelpers.FlushInputBuffer();
+                    }
+                    break;
+                case ConsoleKey.Backspace:
+                case ConsoleKey.LeftArrow:
+                    {
+                        _navigationController.GoUpDirectory();
+                        ReloadGameEntries();
+                        _navigationController.UpdateScrollOffset(_gameEntries.Count, availableLines);
+                        DrawMenu(availableLines);
+                        ProgramHelpers.FlushInputBuffer();
+                    }
+                    break;
+                case ConsoleKey.PageDown:
+                    {
+                        _navigationController.PageDown(_gameEntries, availableLines);
+                        DrawMenu(availableLines);
+                        ProgramHelpers.FlushInputBuffer();
+                    }
+                    break;
+                case ConsoleKey.PageUp:
+                    {
+                        _navigationController.PageUp(_gameEntries, availableLines);
+                        DrawMenu(availableLines);
+                        ProgramHelpers.FlushInputBuffer();
+                    }
+                    break;
+                case ConsoleKey.Multiply:
+                case ConsoleKey.Oem8:
+                    {
+                        // Toggle favorite for selected ZIP (handles numpad * and some layouts)
+                        if (_gameEntries.Count > 0 && _gameEntries[_navigationController.SelectedIndex].Kind == EntryKind.Zip)
+                        {
+                            var ge = _gameEntries[_navigationController.SelectedIndex];
+                            string path = ge.InPatch ? ge.PatchPath : ge.RootPath;
+                            try
+                            {
+                                _favoritesService.Toggle(path);
+                            }
+                            catch (Exception ex)
+                            {
+                                _errorService.ShowError("Failed to toggle favorite: " + ex.Message);
+                            }
+                            // Redraw the whole menu so the '*' marker updates immediately
+                            DrawMenu(availableLines);
+                        }
+                        ProgramHelpers.FlushInputBuffer();
+                    }
+                    break;
+                case ConsoleKey.Escape:
+                case ConsoleKey.Q:
+                    return true;
+            }
+
+            return false;
+        }
+    }
+}

src/MarcerGameDvdLauncher/LauncherApp.cs

@@ -69,245 +69,139 @@ namespace MarcerGameDvdLauncher
             if (string.IsNullOrWhiteSpace(cfg.Hatari.ArgsTemplate) || !cfg.Hatari.ArgsTemplate.Contains("{zip}"))
                 throw new InvalidOperationException("Hatari.ArgsTemplate must contain the {zip} placeholder.");
 
+            // Parse Colors section manually so invalid values fall back to defaults
+            // instead of crashing the deserialization.
+            cfg.Colors = ParseAppColors(json);
+
             return cfg;
         }
+
+        // Parses the optional "Colors" JSON section into an AppColorConfig.
+        // Each field is resolved with Enum.TryParse<ConsoleColor>; unparseable or
+        // missing values silently fall back to the defaults defined in AppColorConfig.
+        private static AppColorConfig ParseAppColors(string json)
+        {
+            var colors = new AppColorConfig();
+            try
+            {
+                using var doc = System.Text.Json.JsonDocument.Parse(json);
+                if (doc.RootElement.TryGetProperty("Colors", out var colorsEl) && colorsEl.ValueKind == System.Text.Json.JsonValueKind.Object)
+                {
+                    ParseColorField(colorsEl, "FolderBoth", v => colors.FolderBoth = v);
+                    ParseColorField(colorsEl, "FolderPatchOnly", v => colors.FolderPatchOnly = v);
+                    ParseColorField(colorsEl, "FolderRootOnly", v => colors.FolderRootOnly = v);
+                    ParseColorField(colorsEl, "ZipBoth", v => colors.ZipBoth = v);
+                    ParseColorField(colorsEl, "ZipRootOnly", v => colors.ZipRootOnly = v);
+                    ParseColorField(colorsEl, "ZipPatchOnly", v => colors.ZipPatchOnly = v);
+                    ParseColorField(colorsEl, "SelectedForeground", v => colors.SelectedForeground = v);
+                    ParseColorField(colorsEl, "SelectedBackground", v => colors.SelectedBackground = v);
+                    ParseColorField(colorsEl, "VirtualEntry", v => colors.VirtualEntry = v);
+                }
+            }
+            catch
+            {
+                // On any JSON error, fall back to default colors (already set above)
+            }
+            return colors;
+        }
+
+        private static void ParseColorField(System.Text.Json.JsonElement colorsEl, string name, Action<ConsoleColor> setter)
+        {
+            if (colorsEl.TryGetProperty(name, out var prop) && prop.ValueKind == System.Text.Json.JsonValueKind.String)
+            {
+                var str = prop.GetString();
+                if (Enum.TryParse<ConsoleColor>(str ?? string.Empty, ignoreCase: true, out var parsed))
+                    setter(parsed);
+                // Invalid color names are silently ignored — defaults are preserved
+            }
+        }
     }
 
-    // Internal host that keeps state previously stored in Program.cs
+    // Internal host that keeps state and lifecycle management for the application.
+    // Key-handling logic has been extracted into InputController; this class
+    // focuses on component wiring, initialization and the main loop (resize detection + key polling).
     internal class AppHost(AppConfig cfg)
     {
-        OverlayDirectoryBrowser? _directoryBrowser;
-        MenuRenderer _menuRenderer = new MenuRenderer();
-        NavigationController _navigationController = new NavigationController();
-        List<GameEntry> _gameEntries = new List<GameEntry>();
-        HatariLauncher? _hatariLauncher;
-        readonly UIErrorService _errorService = new UIErrorService();
-        FavoritesService? _favoritesService;
+        private InputController? _inputController;
+        private MenuRenderer? _menuRenderer;
+        private HatariLauncher? _hatariLauncher;
+        private int _currentAvailableLines;
+        private int _currentWidth;
 
-        public void InitializeComponents()
+    public void InitializeComponents()
+    {
+        var directoryBrowser = new OverlayDirectoryBrowser(cfg.RootDirectory ?? string.Empty, cfg.PatchDirectory ?? string.Empty);
+
+        // Initialize favorites service. Use PatchDirectory if present, otherwise exe dir fallback.
+        string favPath;
+        if (!string.IsNullOrWhiteSpace(cfg.PatchDirectory))
         {
-            _directoryBrowser = new OverlayDirectoryBrowser(cfg.RootDirectory ?? string.Empty, cfg.PatchDirectory ?? string.Empty);
-            // Initialize favorites service. Use PatchDirectory if present, otherwise exe dir fallback.
-            string favPath;
-            if (!string.IsNullOrWhiteSpace(cfg.PatchDirectory))
-            {
-                favPath = Path.Combine(cfg.PatchDirectory!, "favorites.txt");
-            }
-            else
-            {
-                favPath = Path.Combine(AppContext.BaseDirectory, "favorites.txt");
-            }
-            _favoritesService = new FavoritesService(favPath);
-            try { _favoritesService.Load(); } catch { /* ignore load errors */ }
-            try
-            {
-                _hatariLauncher = new HatariLauncher(cfg.Hatari?.Executable ?? throw new InvalidOperationException("Hatari.Executable not configured"), cfg.Hatari?.ConfigFile ?? string.Empty, cfg.Hatari?.ArgsTemplate ?? "-c \"{cfg}\" --disk-a \"{zip}\"");
-            }
-            catch (Exception ex)
-            {
-                ProgramHelpers.ShowConsoleMessage(["Hatari initialization error: " + ex.Message, "Press any key to exit."
-                ], ConsoleColor.Red);
-                Environment.Exit(1);
-            }
-            Console.CursorVisible = false;
+            favPath = Path.Combine(cfg.PatchDirectory!, FavoritesService.DefaultFileName);
         }
+        else
+        {
+            favPath = Path.Combine(AppContext.BaseDirectory, FavoritesService.DefaultFileName);
+        }
+        var favoritesService = new FavoritesService(favPath);
+        try { favoritesService.Load(); } catch { /* ignore load errors */ }
+
+        var errorService = new UIErrorService();
+        try
+        {
+            // ArgsTemplate is validated in LoadConfiguration — it must always contain {zip}.
+            // No hardcoded fallback is needed; the config file is the single source of truth.
+            _hatariLauncher = new HatariLauncher(cfg.Hatari?.Executable ?? throw new InvalidOperationException("Hatari.Executable not configured"), cfg.Hatari?.ConfigFile ?? string.Empty, cfg.Hatari?.ArgsTemplate ?? string.Empty);
+        }
+        catch (Exception ex)
+        {
+            ProgramHelpers.ShowConsoleMessage(["Hatari initialization error: " + ex.Message, "Press any key to exit."
+            ], ConsoleColor.Red);
+            Environment.Exit(1);
+        }
+
+        _menuRenderer = new MenuRenderer(cfg.Colors);
+        var navigationController = new NavigationController();
+
+        _inputController = new InputController(directoryBrowser, _menuRenderer, navigationController,
+            _hatariLauncher!, favoritesService, errorService);
+
+        Console.CursorVisible = false;
+    }
 
         public void RunDirectoryNavigation()
         {
+            _currentAvailableLines = ProgramHelpers.AvailableLines;
+            _currentWidth = Console.WindowWidth;
+
+            _inputController!.ReloadGameEntries();
+            _inputController.RefreshView(_currentAvailableLines);
+
             bool exitRequested = false;
-            ReloadGameEntries();
-            int currentAvailableLines = Console.WindowHeight - 1;
-            int currentWidth = Console.WindowWidth;
-            _navigationController.UpdateScrollOffset(_gameEntries.Count, currentAvailableLines);
-            var isFav = new Func<GameEntry, bool>(e => _favoritesService?.IsFavorite(e.Kind == EntryKind.Zip ? (e.InPatch ? e.PatchPath : e.RootPath) ?? string.Empty : string.Empty) ?? false);
-            _menuRenderer.DrawMenu(_gameEntries, _navigationController.ScrollOffset, _navigationController.SelectedIndex, currentAvailableLines, isFav);
             while (!exitRequested)
             {
-                // Reloads are performed explicitly when entering or leaving directories (Enter/Backspace)
+                // Reloads are performed explicitly by InputController when entering/leaving directories
                 // Do NOT hit the filesystem here on every loop iteration.
 
                 // detect a change in console height and/or width and redraw immediately
-                int latestAvailableLines = Console.WindowHeight - 1;
+                int latestAvailableLines = ProgramHelpers.AvailableLines;
                 int latestWidth = Console.WindowWidth;
-                if (latestAvailableLines != currentAvailableLines || latestWidth != currentWidth)
-                {
-                    currentAvailableLines = latestAvailableLines;
-                    currentWidth = latestWidth;
-                    _navigationController.UpdateScrollOffset(_gameEntries.Count, currentAvailableLines);
-                    _menuRenderer.DrawMenu(_gameEntries, _navigationController.ScrollOffset, _navigationController.SelectedIndex, currentAvailableLines, isFav);
-                }
-
-                // Only block if there's actually a key; otherwise allow resize detection
-                if (!Console.KeyAvailable)
-                {
-                    Thread.Sleep(50);
-                    continue;
-                }
-
-                var key = Console.ReadKey(intercept: true);
-                if (key.KeyChar == '?')
-                {
-                    _menuRenderer.ShowHelpBox(currentAvailableLines);
-                    Console.ReadKey(intercept: true);
-                    _menuRenderer.InvalidateCache();
-                    _menuRenderer.DrawMenu(_gameEntries, _navigationController.ScrollOffset, _navigationController.SelectedIndex, currentAvailableLines, isFav);
-                    ProgramHelpers.FlushInputBuffer();
-                    continue;
-                }
-                switch (key.Key)
-                {
-                    case ConsoleKey.UpArrow:
-                        int previousSelectedIndexUp = _navigationController.SelectedIndex;
-                        bool didScrollUp = _navigationController.MoveUp(_gameEntries, currentAvailableLines);
-                        if (didScrollUp)
-                        {
-                            _menuRenderer.DrawMenu(_gameEntries, _navigationController.ScrollOffset, _navigationController.SelectedIndex, currentAvailableLines, isFav);
-                        }
-                        else
-                        {
-                            _menuRenderer.RedrawEntry(_gameEntries, previousSelectedIndexUp, previousSelectedIndexUp - _navigationController.ScrollOffset, false, currentAvailableLines, isFav);
-                            _menuRenderer.RedrawEntry(_gameEntries, _navigationController.SelectedIndex, _navigationController.SelectedIndex - _navigationController.ScrollOffset, true, currentAvailableLines, isFav);
-                        }
-                        // flush input to avoid key repeat
-                        ProgramHelpers.FlushInputBuffer();
-                        break;
-                    case ConsoleKey.DownArrow:
-                        int previousSelectedIndexDown = _navigationController.SelectedIndex;
-                        bool didScrollDown = _navigationController.MoveDown(_gameEntries, currentAvailableLines);
-                            if (didScrollDown)
-                            {
-                                _menuRenderer.DrawMenu(_gameEntries, _navigationController.ScrollOffset, _navigationController.SelectedIndex, currentAvailableLines, isFav);
-                            }
-                            else
-                            {
-                                _menuRenderer.RedrawEntry(_gameEntries, previousSelectedIndexDown, previousSelectedIndexDown - _navigationController.ScrollOffset, false, currentAvailableLines, isFav);
-                                _menuRenderer.RedrawEntry(_gameEntries, _navigationController.SelectedIndex, _navigationController.SelectedIndex - _navigationController.ScrollOffset, true, currentAvailableLines, isFav);
-                            }
-                        ProgramHelpers.FlushInputBuffer();
-                        break;
-                    case ConsoleKey.Enter:
-                    case ConsoleKey.RightArrow:
-                        var oldRelativePath = _navigationController.CurrentRelativePath;
-                        var isDirectory = _gameEntries.Count > 0 && _gameEntries[_navigationController.SelectedIndex].Kind == EntryKind.Directory;
-                        _navigationController.HandleEnter(_gameEntries);
-                        if (isDirectory && oldRelativePath != _navigationController.CurrentRelativePath) {
-                            ReloadGameEntries();
-                            _navigationController.UpdateScrollOffset(_gameEntries.Count, currentAvailableLines);
-                        }
-                        _menuRenderer.DrawMenu(_gameEntries, _navigationController.ScrollOffset, _navigationController.SelectedIndex, currentAvailableLines, isFav);
-                        // Only start a ZIP if NOT switching to a directory
-                        if (!isDirectory && _gameEntries.Count > 0 && _gameEntries[_navigationController.SelectedIndex].Kind == EntryKind.Zip)
-                        {
-                            string zipToLaunch = _gameEntries[_navigationController.SelectedIndex].InPatch ? _gameEntries[_navigationController.SelectedIndex].PatchPath : _gameEntries[_navigationController.SelectedIndex].RootPath;
-                            try
-                            {
-                                _hatariLauncher!.Launch(zipToLaunch);
-                            }
-                            catch (Exception ex)
-                            {
-                                _errorService.ShowError(ex.Message);
-                            }
-                        }
-                        // flush input to avoid leftover key events after an enter/navigation
-                        ProgramHelpers.FlushInputBuffer();
-                        break;
-                    case ConsoleKey.Backspace:
-                    case ConsoleKey.LeftArrow:
-                        _navigationController.GoUpDirectory();
-                        ReloadGameEntries();
-                        _navigationController.UpdateScrollOffset(_gameEntries.Count, currentAvailableLines);
-                        _menuRenderer.DrawMenu(_gameEntries, _navigationController.ScrollOffset, _navigationController.SelectedIndex, currentAvailableLines, isFav);
-                        ProgramHelpers.FlushInputBuffer();
-                        break;
-                    case ConsoleKey.PageDown:
-                        _navigationController.PageDown(_gameEntries, currentAvailableLines);
-                        _menuRenderer.DrawMenu(_gameEntries, _navigationController.ScrollOffset, _navigationController.SelectedIndex, currentAvailableLines, isFav);
-                        ProgramHelpers.FlushInputBuffer();
-                        break;
-                    case ConsoleKey.PageUp:
-                        _navigationController.PageUp(_gameEntries, currentAvailableLines);
-                        _menuRenderer.DrawMenu(_gameEntries, _navigationController.ScrollOffset, _navigationController.SelectedIndex, currentAvailableLines, isFav);
-                        ProgramHelpers.FlushInputBuffer();
-                        break;
-                    case ConsoleKey.Multiply:
-                    case ConsoleKey.Oem8:
-                        // Toggle favorite for selected ZIP (handles numpad * and some layouts)
-                        if (_gameEntries.Count > 0 && _gameEntries[_navigationController.SelectedIndex].Kind == EntryKind.Zip)
-                        {
-                            var ge = _gameEntries[_navigationController.SelectedIndex];
-                            string path = ge.InPatch ? ge.PatchPath : ge.RootPath;
-                            try
-                            {
-                                _favoritesService?.Toggle(path);
-                            }
-                            catch (Exception ex)
-                            {
-                                _errorService.ShowError("Failed to toggle favorite: " + ex.Message);
-                            }
-                            // Redraw the whole menu so the '*' marker updates immediately
-                            _menuRenderer.DrawMenu(_gameEntries, _navigationController.ScrollOffset, _navigationController.SelectedIndex, currentAvailableLines, isFav);
-                        }
-                        ProgramHelpers.FlushInputBuffer();
-                        break;
-                    case ConsoleKey.Escape:
-                    case ConsoleKey.Q:
-                        exitRequested = true;
-                        break;
-                }
-            }
-        }
-
-        void ReloadGameEntries()
-        {
-            try
+            if (latestAvailableLines != _currentAvailableLines || latestWidth != _currentWidth)
             {
-                // If we are at the virtual Favorites folder, produce the flat list from the favorites service
-                if (string.Equals(_navigationController.CurrentRelativePath, "Favorites", StringComparison.OrdinalIgnoreCase))
-                {
-                    var favs = _favoritesService?.GetAll() ?? new List<string>();
-                    _gameEntries = favs.Select(p => new GameEntry
-                    {
-                        Name = Path.GetFileName(p),
-                        Kind = EntryKind.Zip,
-                        InRoot = true,
-                        InPatch = false,
-                        RootPath = p,
-                        PatchPath = string.Empty,
-                        IsVirtual = false
-                    }).ToList();
-                    _navigationController.SetEntriesCount(_gameEntries.Count);
-                    return;
-                }
-
-                // Otherwise use the overlay directory browser for normal folders
-                _gameEntries = _directoryBrowser!.GetEntries(_navigationController.CurrentRelativePath);
-
-                // If we are at the root and there are favorites, prepend a virtual "Favorites" folder
-                if (string.IsNullOrEmpty(_navigationController.CurrentRelativePath) && (_favoritesService?.HasFavorites() ?? false))
-                {
-                    var virtualEntry = new GameEntry
-                    {
-                        Name = "Favorites",
-                        Kind = EntryKind.Directory,
-                        InRoot = true,
-                        InPatch = false,
-                        RootPath = string.Empty,
-                        PatchPath = string.Empty,
-                        IsVirtual = true
-                    };
-                    // insert at the beginning
-                    _gameEntries.Insert(0, virtualEntry);
-                }
-
-                _navigationController.SetEntriesCount(_gameEntries.Count);
+                _currentAvailableLines = latestAvailableLines;
+                _currentWidth = latestWidth;
+                _inputController.RefreshView(_currentAvailableLines);
             }
-            catch (Exception ex)
+
+            // Only block if there's actually a key; otherwise allow resize detection
+            if (!Console.KeyAvailable)
             {
-                // Show the error to the user and continue with an empty list
-                _errorService.ShowError(ex.Message);
-                _gameEntries = new List<GameEntry>();
-                _navigationController.SetEntriesCount(0);
+                Thread.Sleep(50);
+                continue;
             }
+
+            var key = Console.ReadKey(intercept: true);
+            exitRequested = _inputController.HandleKey(key, _currentAvailableLines);
         }
     }
+    }
 }

src/MarcerGameDvdLauncher/MenuRenderer.cs

@@ -11,6 +11,14 @@ namespace MarcerGameDvdLauncher
         private LineState[] _cachedBuffer = Array.Empty<LineState>();
         private int _cachedWidth = -1;
 
+        // Color configuration (injected; defaults to built-in scheme if null)
+        private readonly AppColorConfig _colors;
+
+        public MenuRenderer(AppColorConfig? colors = null)
+        {
+            _colors = colors ?? new AppColorConfig();
+        }
+
         // availableLines is provided per-draw so the renderer adapts to console resizes
         public void DrawMenu(List<GameEntry> entries, int scrollOffset, int selectedIndex, int availableLines, Func<GameEntry, bool>? isFavorite = null)
         {
@@ -43,11 +51,8 @@ namespace MarcerGameDvdLauncher
             }
 
             // Diff & write only changed lines
-            // Use the caller-provided availableLines (which should be Console.WindowHeight - 1)
-            int maxRow = Math.Max(0, availableLines - 1);
             for (int row = 0; row < availableLines; row++)
             {
-                if (row > maxRow) break;
                 var newLine = newBuffer[row];
                 var oldLine = _cachedBuffer[row];
                 if (oldLine.Text != newLine.Text || oldLine.Fg != newLine.Fg || oldLine.Bg != newLine.Bg)
@@ -63,26 +68,16 @@ namespace MarcerGameDvdLauncher
         {
             if (entryIdx < 0 || entryIdx >= entries.Count) return;
             availableLines = Math.Max(1, availableLines);
-            int maxRow = Math.Max(0, availableLines - 1);
-            if (row < 0 || row > maxRow) return;
+            // row is a visual row within the visible window; validate against availableLines
+            if (row < 0 || row >= availableLines) return;
 
             int width = Console.WindowWidth;
-            // ensure cache is valid for current width/height and the target row
-            EnsureCacheForRow(width, Math.Min(availableLines, Math.Max(1, _cachedBuffer.Length == 0 ? 1 : _cachedBuffer.Length)));
+            // Ensure the cache matches the current dimensions (same as DrawMenu)
+            EnsureCache(width, availableLines);
 
             var e = entries[entryIdx];
+            var (fg, bg) = GetColors(e, selected);
             string text = BuildLineText(e, width, isFavorite?.Invoke(e) ?? false);
-            ConsoleColor fg, bg;
-            if (selected)
-            {
-                bg = ConsoleColor.DarkCyan;
-                fg = ConsoleColor.Black;
-            }
-            else
-            {
-                bg = ConsoleColor.Black;
-                fg = GetColorForEntry(e);
-            }
 
             var newLine = new LineState { Text = text, Fg = fg, Bg = bg };
             // If cache differs, write
@@ -113,18 +108,6 @@ namespace MarcerGameDvdLauncher
             }
         }
 
-        // Ensures the cached buffer has at least requiredRows entries and matches width.
-        private void EnsureCacheForRow(int width, int requiredRows)
-        {
-            if (_cachedBuffer.Length < requiredRows || _cachedWidth != width)
-            {
-                int newLen = Math.Max(requiredRows, 1);
-                _cachedBuffer = new LineState[newLen];
-                for (int i = 0; i < newLen; i++) _cachedBuffer[i].Text = null!;
-                _cachedWidth = width;
-            }
-        }
-
         // Write a line to the console using the centralized logic (handles concurrent resizes safely)
         private void WriteConsoleLine(int row, LineState newLine)
         {
@@ -229,12 +212,13 @@ namespace MarcerGameDvdLauncher
             return text + new string(' ', width - text.Length);
         }
 
-        // Returns foreground and background colors for an entry depending on selection state
+        // Returns foreground and background colors for an entry depending on selection state.
+        // Selected colors and entry colors come from the injected AppColorConfig.
         private (ConsoleColor fg, ConsoleColor bg) GetColors(GameEntry e, bool selected)
         {
             if (selected)
             {
-                return (ConsoleColor.Black, ConsoleColor.DarkCyan);
+                return (_colors.SelectedForeground, _colors.SelectedBackground);
             }
             else
             {
@@ -306,20 +290,20 @@ namespace MarcerGameDvdLauncher
 
         private ConsoleColor GetColorForEntry(GameEntry e)
         {
-            // Virtual entries (like the Favorites pseudo-folder) should be white
-            if (e.IsVirtual) return ConsoleColor.White;
+            // Virtual entries (like the Favorites pseudo-folder) use the configured VirtualEntry color
+            if (e.IsVirtual) return _colors.VirtualEntry;
 
             if (e.Kind == EntryKind.Directory)
             {
-                if (e.InRoot && e.InPatch) return ConsoleColor.Yellow;       // Both layers
-                if (e.InPatch && !e.InRoot) return ConsoleColor.DarkYellow;  // Only patch
-                if (e.InRoot && !e.InPatch) return ConsoleColor.Gray;        // Only root
+                if (e.InRoot && e.InPatch) return _colors.FolderBoth;       // Both layers
+                if (e.InPatch && !e.InRoot) return _colors.FolderPatchOnly;  // Only patch
+                if (e.InRoot && !e.InPatch) return _colors.FolderRootOnly;   // Only root
             }
             else if (e.Kind == EntryKind.Zip)
             {
-                if (e.InRoot && e.InPatch) return ConsoleColor.Green;        // Both layers
-                if (e.InRoot && !e.InPatch) return ConsoleColor.DarkGreen;   // Only root
-                if (e.InPatch && !e.InRoot) return ConsoleColor.Magenta;     // Only patch
+                if (e.InRoot && e.InPatch) return _colors.ZipBoth;           // Both layers
+                if (e.InRoot && !e.InPatch) return _colors.ZipRootOnly;     // Only root
+                if (e.InPatch && !e.InRoot) return _colors.ZipPatchOnly;     // Only patch
             }
             return ConsoleColor.DarkGray;
         }

src/MarcerGameDvdLauncher/NavigationController.cs

@@ -5,6 +5,12 @@ namespace MarcerGameDvdLauncher
 {
     public class NavigationController
     {
+        // Scroll fractions: when the selection cursor reaches 2/3 of the visible window
+        // height from the top, the list scrolls down; when it reaches 1/3, it scrolls up.
+        // Not configurable — these ratios are the established navigation behaviour.
+        private const double BottomScrollFraction = 2.0 / 3.0;
+        private const double TopScrollFraction = 1.0 / 3.0;
+
         public int SelectedIndex { get; private set; } = 0;
         public int ScrollOffset { get; private set; } = 0;
         public string CurrentRelativePath { get; private set; } = "";
@@ -99,12 +105,12 @@ namespace MarcerGameDvdLauncher
             if (availableLines < 1) availableLines = 1;
             if (entryCount <= availableLines) { ScrollOffset = 0; return; }
             if (SelectedIndex == 0) { ScrollOffset = 0; return; }
-            int bottomScrollTrigger = ScrollOffset + (int)(availableLines * 2 / 3.0);
-            int topScrollTrigger = ScrollOffset + (int)(availableLines * 1 / 3.0);
+            int bottomScrollTrigger = ScrollOffset + (int)(availableLines * BottomScrollFraction);
+            int topScrollTrigger = ScrollOffset + (int)(availableLines * TopScrollFraction);
             if (SelectedIndex >= bottomScrollTrigger && (ScrollOffset + availableLines) < entryCount)
-                ScrollOffset = SelectedIndex - (int)(availableLines * 2 / 3.0);
+                ScrollOffset = SelectedIndex - (int)(availableLines * BottomScrollFraction);
             else if (SelectedIndex < topScrollTrigger && ScrollOffset > 0)
-                ScrollOffset = SelectedIndex - (int)(availableLines * 1 / 3.0);
+                ScrollOffset = SelectedIndex - (int)(availableLines * TopScrollFraction);
             if (ScrollOffset < 0) ScrollOffset = 0;
             if (ScrollOffset > entryCount - availableLines)
                 ScrollOffset = entryCount - availableLines;

src/MarcerGameDvdLauncher/Program.cs

@@ -5,9 +5,12 @@ namespace MarcerGameDvdLauncher
 {
     class Program
     {
+        // Console window title. Not configurable — fixed application display name.
+        private const string DefaultTitle = "Marcer GameDVD Launcher";
+
         static void Main(string[] args)
         {
-            Console.Title = "Marcer GameDVD Launcher";
+            Console.Title = DefaultTitle;
             var app = new LauncherApp();
             app.Run();
         }

src/MarcerGameDvdLauncher/ProgramHelpers.cs

@@ -9,6 +9,11 @@ namespace MarcerGameDvdLauncher
     // Small helpers refactored into their own file to keep Program.cs focused.
     internal static class ProgramHelpers
     {
+        // The console window height minus one. The last row is reserved to prevent
+        // auto-scroll / flicker when the cursor reaches the bottom row (project policy).
+        // Centralized here so the policy lives in exactly one place.
+        public static int AvailableLines => Math.Max(0, Console.WindowHeight - 1);
+
         // Flushes the console input buffer to avoid processing leftover key events
         // Uses Win32 FlushConsoleInputBuffer on the standard input handle. On non-Windows
         // environments this will be a no-op.
@@ -31,6 +36,8 @@ namespace MarcerGameDvdLauncher
             }
         }
 
+        // Win32 API constants — intentionally hardcoded (bewusst hartkodiert).
+        // These are defined by the Windows API and do not change.
         private const int STD_INPUT_HANDLE = -10;
 
         [System.Runtime.InteropServices.DllImport("kernel32.dll")]
@@ -41,6 +48,7 @@ namespace MarcerGameDvdLauncher
         private static extern bool FlushConsoleInputBuffer(IntPtr hConsoleInput);
 
         // P/Invoke to query key state (used to detect physical key release)
+        // Win32 virtual-key code — intentionally hardcoded (bewusst hartkodiert).
         private const int VK_RETURN = 0x0D;
 
         [DllImport("user32.dll")]
@@ -55,7 +63,7 @@ namespace MarcerGameDvdLauncher
         {
             try
             {
-                int lastRow = Math.Max(0, Console.WindowHeight - 1);
+                int lastRow = AvailableLines;
                 int width = Console.WindowWidth;
                 string text = message ?? string.Empty;
                 if (text.Length > width) text = text.Substring(0, Math.Max(0, width - 3)) + "...";

src/MarcerGameDvdLauncher/UIErrorService.cs

@@ -5,6 +5,10 @@ namespace MarcerGameDvdLauncher;
 
 /// <summary>
 /// Centralized service for error and user message output in the console UI.
+/// Errors are presented to the user via <see cref="ProgramHelpers.ShowConsoleMessage"/>
+/// and are not rethrown — the caller's context does not allow for meaningful error
+/// recovery, so the application stays in the navigation loop after the user dismisses
+/// the message.
 /// </summary>
 public class UIErrorService
 {

src/MarcerGameDvdLauncher/launcher.config.example.json

@@ -5,5 +5,16 @@
     "Executable": "C:\\Tools\\hatari\\hatari.exe",
     "ConfigFile": "C:\\Tools\\hatari\\hatari-st.cfg",
     "ArgsTemplate": "-c \"{cfg}\" --disk-a \"{zip}\""
+  },
+  "Colors": {
+    "FolderBoth": "Yellow",
+    "FolderPatchOnly": "DarkYellow",
+    "FolderRootOnly": "Gray",
+    "ZipBoth": "Green",
+    "ZipRootOnly": "DarkGreen",
+    "ZipPatchOnly": "Magenta",
+    "SelectedForeground": "Black",
+    "SelectedBackground": "DarkCyan",
+    "VirtualEntry": "White"
   }
 }