chunk 1: core gameplay scripts scenes runtime assets

Assets/Scripts/SaveSystem/Services/JsonDataService.cs

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+using Newtonsoft.Json;
+using System;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+using UnityEngine;
+
+public class JsonDataService : IDataService
+{
+    public bool SaveData<T>(string relativePath, T data, bool encrypted)
+    {
+        string path = Application.persistentDataPath + relativePath;
+        try
+        {
+            string jsonData = JsonConvert.SerializeObject(data, Formatting.Indented);
+            if (encrypted)
+            {
+                jsonData = EncryptDecrypt(jsonData);
+            }
+            using (FileStream stream = new FileStream(path, FileMode.Create))
+            {
+                using (StreamWriter writer = new StreamWriter(stream))
+                {
+                    writer.Write(jsonData);
+                }
+            }
+            return true;
+        }
+        catch (Exception e)
+        {
+            Debug.LogError($"Failed to save data: {e.Message}");
+            return false;
+        }
+    }
+
+    public T LoadData<T>(string relativePath, bool encrypted)
+    {
+        string path = Application.persistentDataPath + relativePath;
+        if (!File.Exists(path))
+        {
+            throw new FileNotFoundException($"Cannot load file at {path}. File does not exist!");
+        }
+
+        try
+        {
+            string jsonData = "";
+            using (FileStream stream = new FileStream(path, FileMode.Open))
+            {
+                using (StreamReader reader = new StreamReader(stream))
+                {
+                    jsonData = reader.ReadToEnd();
+                }
+            }
+
+            if (encrypted)
+            {
+                jsonData = EncryptDecrypt(jsonData);
+            }
+
+            return JsonConvert.DeserializeObject<T>(jsonData);
+        }
+        catch (Exception e)
+        {
+            Debug.LogError($"Failed to load data: {e.Message}");
+            throw;
+        }
+    }
+
+    private string EncryptDecrypt(string data)
+    {
+        // Simple XOR encryption (replace with more secure method for production)
+        string key = "YOUR_ENCRYPTION_KEY";
+        StringBuilder result = new StringBuilder();
+        for (int i = 0; i < data.Length; i++)
+        {
+            result.Append((char)(data[i] ^ key[i % key.Length]));
+        }
+        return result.ToString();
+    }
+}