Implement core game functionality with AppRoot, SaveClient, PlayerRepository, and LevelRepository classes

game/repositories/LevelRepository.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Mr.BrickAdventures.game.repositories;
+
+public sealed class LevelRepository
+{
+    public int Current { get; private set; } = 0;
+    public HashSet<int> Unlocked { get; } = new() { 0 };
+    public HashSet<int> Completed { get; } = new();
+
+    public event Action<int>? CurrentChanged;
+
+    public void SetCurrent(int idx) { Current = idx; CurrentChanged?.Invoke(Current); }
+    public void Unlock(int idx) => Unlocked.Add(idx);
+    public void Complete(int idx) { Completed.Add(idx); Unlock(idx + 1); }
+
+    public LevelState Export() => new() {
+        Current = Current, Unlocked = [..Unlocked], Completed = [..Completed]
+    };
+    public void Load(LevelState s) {
+        Current = s.Current;
+        Unlocked.Clear(); foreach (var i in s.Unlocked) Unlocked.Add(i);
+        Completed.Clear(); foreach (var i in s.Completed) Completed.Add(i);
+        CurrentChanged?.Invoke(Current);
+    }
+}
+
+public record LevelState {
+    public int Current;
+    public int[] Unlocked = [];
+    public int[] Completed = [];
+}

game/repositories/LevelRepository.cs.uid

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+uid://d0604lmwpadt5

game/repositories/PlayerRepository.cs

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+using System;
+
+namespace Mr.BrickAdventures.game.repositories;
+
+public sealed class PlayerRepository
+{
+    public int Coins { get; private set; } = 0;
+    public int Lives { get; private set; } = 3;
+
+    public event Action<int>? CoinsChanged;
+    public event Action<int>? LivesChanged;
+
+    public void SetCoins(int value)    { Coins = Math.Max(0, value); CoinsChanged?.Invoke(Coins); }
+    public void AddCoins(int amount)   { SetCoins(Coins + amount); }
+    public void RemoveCoins(int amount){ SetCoins(Coins - amount); }
+
+    public void SetLives(int value)    { Lives = value; LivesChanged?.Invoke(Lives); }
+    public void AddLives(int amount)   { SetLives(Lives + amount); }
+    public void RemoveLives(int amount){ SetLives(Lives - amount); }
+
+    public PlayerState Export() => new() { Coins = Coins, Lives = Lives };
+    public void Load(PlayerState s) { SetCoins(s.Coins); SetLives(s.Lives); }
+}
+
+public record PlayerState { public int Coins; public int Lives; }

game/repositories/PlayerRepository.cs.uid

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+uid://d1dijkt574x4b

game/repositories/SessionRepository.cs

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+namespace Mr.BrickAdventures.game.repositories;
+
+public sealed class SessionRepository
+{
+    
+}

game/repositories/SessionRepository.cs.uid

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+uid://b550hcqugygv0

game/repositories/SettingsRepository.cs

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+namespace Mr.BrickAdventures.game.repositories;
+
+public class SettingsRepository
+{
+    
+}

game/repositories/SettingsRepository.cs.uid

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+uid://bk11iduo7bg2h

game/repositories/SkillsRepository.cs

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+namespace Mr.BrickAdventures.game.repositories;
+
+public class SkillsRepository
+{
+    
+}

game/repositories/SkillsRepository.cs.uid

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+uid://cymx7mtmdblun