添加项目文件。

BaseFrame/MultidimensionalTableConfig.cs

@@ -0,0 +1,66 @@
+using Newtonsoft.Json;
+using System;
+using System.IO;
+
+namespace ECCS
+{
+    public sealed class MultidimensionalTableConfig
+    {
+        private static readonly object _lock = new();
+        private static MultidimensionalTableConfig? _instance;
+
+        /// <summary>
+        /// 单例实例（首次访问自动从文件加载）
+        /// </summary>
+        public static MultidimensionalTableConfig Instance
+        {
+            get
+            {
+                lock (_lock)
+                {
+                    if (_instance == null)
+                    {
+                        _instance = Load();
+                    }
+                    return _instance;
+                }
+            }
+        }
+
+        /// <summary>
+        /// exe 目录下的 config.json
+        /// </summary>
+        [JsonIgnore]
+        private static string ConfigFilePath =>
+            Path.Combine(AppContext.BaseDirectory, "config.json");
+
+        // ===== 配置项 =====
+        public string AppToken { get; set; }
+        public string DefaultTableId { get; set; }
+        public bool DefaultTableIsDeleted { get; set; }
+
+        /// <summary>
+        /// 保存到 config.json
+        /// </summary>
+        public void Save()
+        {
+            var json = JsonConvert.SerializeObject(this, Formatting.Indented);
+            File.WriteAllText(ConfigFilePath, json);
+        }
+
+        /// <summary>
+        /// 从 config.json 加载
+        /// </summary>
+        private static MultidimensionalTableConfig Load()
+        {
+            if (!File.Exists(ConfigFilePath))
+            {
+                return new MultidimensionalTableConfig();
+            }
+
+            var json = File.ReadAllText(ConfigFilePath);
+            return JsonConvert.DeserializeObject<MultidimensionalTableConfig>(json)
+                   ?? new MultidimensionalTableConfig();
+        }
+    }
+}