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.Service/JournalPageService.cs

@@ -143,20 +143,33 @@ public class JournalPageService(BaseRepository<Journal> JournalRepository,
 
         if (output != null)
         {
-            output.Tasks = await JournalPageTaskRepository.Queryable()
-                .LeftJoin<JournalPageTaskAnswer>((a, ans) => ans.JournalPageTaskId == a.Id)
-                .Where((a, ans) => a.JournalPageId == output.JournalPageId)
-                .Select((a, ans) => new JournalPageTaskV2Output
-                {
-                    Id = a.Id,
-                    GroupId = a.GroupId,
-                    No = a.No,
-                    Type = (TaskBankTypeEnum)a.Type,
-                    Options = a.Options,
-                    Answers = ans.Answer,
-                    Analysis = ans.Analysis,
-                })
+            var tasks = await JournalPageTaskRepository.Queryable()
+                .Where(a => a.JournalPageId == output.JournalPageId)
                 .ToListAsync();
+
+            if (tasks.Count > 0)
+            {
+                var taskIds = tasks.Select(t => t.Id).ToList();
+                var allAnswers = await JournalPageTaskAnswerRepository.Queryable()
+                    .Where(a => taskIds.Contains(a.JournalPageTaskId))
+                    .ToListAsync();
+
+                output.Tasks = tasks.Select(t => new JournalPageTaskV2Output
+                {
+                    Id = t.Id,
+                    GroupId = t.GroupId,
+                    No = t.No,
+                    Type = t.Type,
+                    Answers = allAnswers
+                        .Where(a => a.JournalPageTaskId == t.Id)
+                        .Select(a => new JournalTaskAnswerOutput
+                        {
+                            Id = a.Id,
+                            Answer = a.Answer,
+                            AnswerUrl = a.AnswerUrL
+                        }).ToList()
+                }).ToList();
+            }
         }
         //if (output?.Areas != null)
         //    output.Areas = await _JournalPageOtherRepository.Queryable().Where(w => w.JournalPageId == output.JournalPageId).Select<JournalPageOtherOutput>().ToListAsync();