Add backend projects with core models and tests, setup Godot frontend

frontend/scripts/core/GameData.cs

@@ -0,0 +1,13 @@
+using Godot;
+
+[GlobalClass]
+public partial class GameData : Resource
+{
+    [Export] public string CompanyName { get; set; } = "My Company";
+    [Export] public int StartYear { get; set; } = 1980;
+    [Export] public decimal StartingCash { get; set; } = 100000m;
+    
+    // Настройки карты
+    [Export] public int CityCount { get; set; } = 10;
+    [Export] public bool EnableImports { get; set; } = true;
+}

frontend/scripts/core/GameManager.cs

@@ -0,0 +1,59 @@
+using Godot;
+
+/// <summary>
+/// Менеджер игры - управляет состоянием игры
+/// </summary>
+public partial class GameManager : Node
+{
+    public static GameManager Instance { get; private set; } = null!;
+    
+    [Signal] public delegate void MoneyChangedEventHandler(decimal newAmount);
+    [Signal] public delegate void DateChangedEventHandler(int year, int month, int day);
+    
+    public decimal Money { get; private set; } = 100000m;
+    public int GameYear { get; private set; } = 1980;
+    public int GameMonth { get; private set; } = 1;
+    public int GameDay { get; private set; } = 1;
+    
+    public override void _Ready()
+    {
+        if (Instance != null && Instance != this)
+        {
+            QueueFree();
+            return;
+        }
+        
+        Instance = this;
+    }
+    
+    public void AddMoney(decimal amount)
+    {
+        Money += amount;
+        EmitSignal(SignalName.MoneyChanged, Money);
+    }
+    
+    public void SpendMoney(decimal amount)
+    {
+        if (Money >= amount)
+        {
+            Money -= amount;
+            EmitSignal(SignalName.MoneyChanged, Money);
+        }
+    }
+    
+    public void AdvanceTime(int ticks)
+    {
+        GameDay += ticks;
+        if (GameDay > 30)
+        {
+            GameDay = 1;
+            GameMonth++;
+            if (GameMonth > 12)
+            {
+                GameMonth = 1;
+                GameYear++;
+            }
+        }
+        EmitSignal(SignalName.DateChanged, GameYear, GameMonth, GameDay);
+    }
+}

frontend/scripts/core/Main.cs

@@ -0,0 +1,13 @@
+using Godot;
+
+public partial class Main : Node2D
+{
+    public override void _Ready()
+    {
+        GD.Print("MyBiz - Game Started!");
+    }
+
+    public override void _Process(double delta)
+    {
+    }
+}

frontend/scripts/ui/GameUI.cs

@@ -0,0 +1,35 @@
+using Godot;
+
+/// <summary>
+/// Базовый класс для всех UI элементов
+/// </summary>
+public partial class GameUI : Control
+{
+    protected GameManager GameManager => GameManager.Instance;
+    
+    public override void _Ready()
+    {
+        ConnectSignals();
+    }
+    
+    protected virtual void ConnectSignals()
+    {
+        if (GameManager != null)
+        {
+            GameManager.MoneyChanged += OnMoneyChanged;
+            GameManager.DateChanged += OnDateChanged;
+        }
+    }
+    
+    protected virtual void OnMoneyChanged(decimal newAmount) { }
+    protected virtual void OnDateChanged(int year, int month, int day) { }
+    
+    public override void _ExitTree()
+    {
+        if (GameManager != null)
+        {
+            GameManager.MoneyChanged -= OnMoneyChanged;
+            GameManager.DateChanged -= OnDateChanged;
+        }
+    }
+}