feat: 初始化后台管理模块与基础业务框架

1.  新增依赖注入生命周期标记接口、基础仓储与管理员仓储实现
2.  新增管理员认证与用户服务接口，补充认证相关DTO
3.  重构实体审计字段命名，统一Created/UpdatedAt规范
4.  新增大量业务实体类与API版本枚举配置
5.  集成Autofac依赖注入、JWT自动刷新与跨域配置
6.  替换原有微信小程序与旧认证服务为后台管理系统架构
7.  完善Swagger文档配置与项目基础部署配置

QYZH.InteractiveMagazine.Infrastructure/Auth/JwtHelper.cs

@@ -44,28 +44,51 @@ public static class JwtHelper
     }
 
     /// <summary>
-    /// 验证JWT令牌
+    /// 获取Token过期时间
     /// </summary>
     /// <param name="token">JWT令牌</param>
-    /// <param name="settings">JWT配置</param>
-    /// <returns>ClaimsPrincipal对象</returns>
-    public static ClaimsPrincipal ValidateToken(string token, JwtSettings settings)
+    /// <returns>过期时间</returns>
+    public static DateTime? GetTokenExpiry(string token)
     {
         var tokenHandler = new JwtSecurityTokenHandler();
-        var key = Encoding.UTF8.GetBytes(settings.SecretKey!);
-
-        var validationParameters = new TokenValidationParameters
+        if (tokenHandler.ReadToken(token) is JwtSecurityToken jwtToken)
         {
-            ValidateIssuer = true,
-            ValidIssuer = settings.Issuer,
-            ValidateAudience = true,
-            ValidAudience = settings.Audience,
-            ValidateIssuerSigningKey = true,
-            IssuerSigningKey = new SymmetricSecurityKey(key),
-            ValidateLifetime = true,
-            ClockSkew = TimeSpan.Zero
-        };
+            return jwtToken.ValidTo;
+        }
+        return null;
+    }
 
-        return tokenHandler.ValidateToken(token, validationParameters, out _);
+    /// <summary>
+    /// 从Token中获取用户ID
+    /// </summary>
+    /// <param name="token">JWT令牌</param>
+    /// <returns>用户ID</returns>
+    public static long? GetUserIdFromToken(string token)
+    {
+        var tokenHandler = new JwtSecurityTokenHandler();
+        if (tokenHandler.ReadToken(token) is JwtSecurityToken jwtToken)
+        {
+            var userIdClaim = jwtToken.Claims.FirstOrDefault(c => c.Type == ClaimTypes.NameIdentifier);
+            if (long.TryParse(userIdClaim?.Value, out long userId))
+            {
+                return userId;
+            }
+        }
+        return null;
+    }
+
+    /// <summary>
+    /// 从Token中获取用户名
+    /// </summary>
+    /// <param name="token">JWT令牌</param>
+    /// <returns>用户名</returns>
+    public static string GetUserNameFromToken(string token)
+    {
+        var tokenHandler = new JwtSecurityTokenHandler();
+        if (tokenHandler.ReadToken(token) is JwtSecurityToken jwtToken)
+        {
+            return jwtToken.Claims.FirstOrDefault(c => c.Type == ClaimTypes.Name)?.Value ?? string.Empty;
+        }
+        return string.Empty;
     }
 }