refactor(journal task): 重构期刊任务模块，优化答案数据结构与流程

1. 移除废弃的KeywordAnalysis相关接口与代码
2. 重构任务答案存储逻辑，改用一对多关联存储多组答案
3. 调整实体与DTO字段，统一评分、时长等任务配置字段位置
4. 优化任务查询与返回结构，使用列表统一管理答案数据
5. 修复微信授权控制器默认返回逻辑

QYZH.InteractiveMagazine.Models/Dto/Journal/JournalPageTaskUpdateInput.cs

@@ -13,11 +13,10 @@ namespace QYZH.InteractiveMagazine.Models.Dto.Journal
         public long Id { get; set; }
 
         /// <summary>
-        /// 书Id
+        /// 杂志Id
         /// </summary>
         public long JournalId { get; set; }
 
-
         /// <summary>
         /// 书页id
         /// </summary>
@@ -38,60 +37,41 @@ namespace QYZH.InteractiveMagazine.Models.Dto.Journal
         /// </summary>
         public string Task { get; set; }
 
-        /// <summary>
-        /// 选项
-        /// </summary>
-        public string Options { get; set; }
-
         /// <summary>
         /// 答案
         /// </summary>
-        public string Answer { get; set; }
+        public List<JournalTaskAnswerInput> TaskAnswer { get; set; }
 
         /// <summary>
-        /// 答案图片
+        /// 积分
         /// </summary>
-        public string AnswerUrl { get; set; }
-
+        public int Points { get; set; }
         /// <summary>
-        /// 解析
+        /// 成长值
         /// </summary>
-        public string Analysis { get; set; }
-
+        public float GrowthPoint { get; set; }
         /// <summary>
-        /// 解析图片地址
+        /// 理解力评分
         /// </summary>
-        public string AnalysisUrl { get; set; }
-
+        public float Comprehension { get; set; }
         /// <summary>
-        /// 问题分数
+        /// 判断力评分
         /// </summary>
-        public float Score { get; set; }
+        public float Judgment { get; set; }
+        /// <summary>
+        /// 表达力评分
+        /// </summary>
+        public float Expression { get; set; }
+        /// <summary>
+        /// 说服力评分
+        /// </summary>
+        public float Persuasiveness { get; set; }
 
         /// <summary>
         /// 回答时间秒
         /// </summary>
         public int AnswerTime { get; set; }
 
-        /// <summary>
-        /// 图片
-        /// </summary>
-        public string ImageUrl { get; set; }
-
-        /// <summary>
-        /// 视频
-        /// </summary>
-        public string VideoUrl { get; set; }
-
-        /// <summary>
-        /// 学科Id
-        /// </summary>
-        public long SubjectId { get; set; }
-
-        /// <summary>
-        /// 关联的知识点ids
-        /// </summary>
-        public string KnowledgepointIds { get; set; }
     }
 
     public class JournalPageTaskComplementInput