添加智能分类功能，支持获取未分类账单数量和列表；实现AI分类逻辑；更新相关API和前端视图

Repository/TransactionRecordRepository.cs

@@ -60,6 +60,19 @@ public interface ITransactionRecordRepository : IBaseRepository<TransactionRecor
     /// <param name="emailMessageId">邮件ID</param>
     /// <returns>交易记录列表</returns>
     Task<List<TransactionRecord>> GetByEmailIdAsync(long emailMessageId);
+
+    /// <summary>
+    /// 获取未分类的账单数量
+    /// </summary>
+    /// <returns>未分类账单数量</returns>
+    Task<int> GetUnclassifiedCountAsync();
+
+    /// <summary>
+    /// 获取未分类的账单列表
+    /// </summary>
+    /// <param name="pageSize">每页数量</param>
+    /// <returns>未分类账单列表</returns>
+    Task<List<TransactionRecord>> GetUnclassifiedAsync(int pageSize = 10);
 }
 
 public class TransactionRecordRepository(IFreeSql freeSql) : BaseRepository<TransactionRecord>(freeSql), ITransactionRecordRepository
@@ -180,4 +193,20 @@ public class TransactionRecordRepository(IFreeSql freeSql) : BaseRepository<Tran
             .OrderBy(t => t.OccurredAt)
             .ToListAsync();
     }
+
+    public async Task<int> GetUnclassifiedCountAsync()
+    {
+        return (int)await FreeSql.Select<TransactionRecord>()
+            .Where(t => string.IsNullOrEmpty(t.Classify))
+            .CountAsync();
+    }
+
+    public async Task<List<TransactionRecord>> GetUnclassifiedAsync(int pageSize = 10)
+    {
+        return await FreeSql.Select<TransactionRecord>()
+            .Where(t => string.IsNullOrEmpty(t.Classify))
+            .OrderByDescending(t => t.OccurredAt)
+            .Page(1, pageSize)
+            .ToListAsync();
+    }
 }