添加配置管理功能，包括获取和设置配置值的接口及实现

Service/ConfigService.cs

@@ -0,0 +1,77 @@
+namespace Service;
+
+public interface IConfigService
+{
+    /// <summary>
+    /// 根据Key获取配置值
+    /// </summary>
+    Task<T?> GetConfigByKeyAsync<T>(string key);
+
+    /// <summary>
+    /// 设置配置值
+    /// </summary>
+    Task<bool> SetConfigByKeyAsync<T>(string key, T value);
+}
+
+public class ConfigService(IConfigRepository configRepository) : IConfigService
+{
+    public async Task<T?> GetConfigByKeyAsync<T>(string key)
+    {
+        var config = await configRepository.GetByKeyAsync(key);
+        if (config == null || string.IsNullOrEmpty(config.Value))
+        {
+            return default;
+        }
+
+        return config.Type switch
+        {
+            ConfigType.Boolean => (T)(object)bool.Parse(config.Value),
+            ConfigType.String => (T)(object)config.Value,
+            ConfigType.Number => (T)Convert.ChangeType(config.Value, typeof(T)),
+            ConfigType.Json => JsonSerializer.Deserialize<T>(config.Value) ?? default,
+            _ => default
+        };
+    }
+
+    public async Task<bool> SetConfigByKeyAsync<T>(string key, T value)
+    {
+        if (value == null)
+        {
+            return false;
+        }
+
+        var config = await configRepository.GetByKeyAsync(key);
+        var type = typeof(T) switch
+        {
+            Type t when t == typeof(bool) => ConfigType.Boolean,
+            Type t when t == typeof(int)
+                || t == typeof(double)
+                || t == typeof(float)
+                || t == typeof(decimal) => ConfigType.Number,
+            Type t when t == typeof(string) => ConfigType.String,
+            _ => ConfigType.Json
+        };
+        var valueStr = type switch
+        {
+            ConfigType.Boolean => value.ToString()!.ToLower(),
+            ConfigType.Number => value.ToString()!,
+            ConfigType.String => value as string ?? string.Empty,
+            ConfigType.Json => JsonSerializer.Serialize(value),
+            _ => throw new InvalidOperationException("Unsupported config type")
+        };
+        if (config == null)
+        {
+            config = new ConfigEntity
+            {
+                Key = key,
+                Type = type,
+
+            };
+            return await configRepository.AddAsync(config);
+        }
+
+        config.Value = valueStr;
+        config.Type = type;
+        return await configRepository.UpdateAsync(config);
+    }
+}