添加配置管理功能，包括获取和设置配置值的接口及实现

WebApi/Controllers/ConfigController.cs

@@ -0,0 +1,41 @@
+namespace WebApi.Controllers;
+
+[ApiController]
+[Route("api/[controller]/[action]")]
+public class ConfigController(
+    IConfigService configService
+) : ControllerBase
+{
+    /// <summary>
+    /// 获取配置值
+    /// </summary>
+    public async Task<BaseResponse<string>> GetConfig(string key)
+    {
+        try
+        {
+            var config = await configService.GetConfigByKeyAsync<string>(key);
+            var value = config ?? string.Empty;
+            return value.Ok("配置获取成功");
+        }
+        catch (Exception ex)
+        {
+            return $"获取{key}配置失败: {ex.Message}".Fail<string>();
+        }
+    }
+
+    /// <summary>
+    /// 设置配置值
+    /// </summary>
+    public async Task<BaseResponse> SetConfig(string key, string value)
+    {
+        try
+        {
+            await configService.SetConfigByKeyAsync(key, value);
+            return "配置设置成功".Ok();
+        }
+        catch (Exception ex)
+        {
+            return $"设置{key}配置失败: {ex.Message}".Fail();
+        }
+    }
+}