refactor(auth): 优化JWT认证和Token刷新逻辑

1. 调整JWT令牌过期时间配置，新增JwtTokenExpiryDays配置项
2. 分离Token存储前缀，区分管理后台和微信端Token
3. 新增Redis Token有效性校验逻辑，拦截无效/已注销的Token
4. 简化自动刷新逻辑，改为每次请求刷新Redis Token过期时间
5. 完善相关注释和代码结构

QYZH.InteractiveMagazine.Infrastructure/Auth/JwtHelper.cs

@@ -36,7 +36,7 @@ public static class JwtHelper
             issuer: settings.Issuer,
             audience: settings.Audience,
             claims: claims,
-            expires: DateTime.Now.AddMinutes(settings.ExpiryMinutes),
+            expires: DateTime.Now.AddDays(settings.JwtTokenExpiryDays),
             signingCredentials: credentials
         );