初始化

FutureMailAPI/Services/IMailService.cs

@@ -17,5 +17,15 @@ namespace FutureMailAPI.Services
         Task<ApiResponse<bool>> MarkReceivedMailAsReadAsync(int userId, int mailId);
         Task<ApiResponse<bool>> MarkAsReadAsync(int userId, int mailId);
         Task<ApiResponse<bool>> RevokeMailAsync(int userId, int mailId);
+        
+        // 存入胶囊相关方法
+        Task<ApiResponse<SaveToCapsuleResponseDto>> SaveToCapsuleAsync(int userId, SaveToCapsuleDto saveToCapsuleDto);
+        Task<ApiResponse<PagedResponse<CapsuleMailListResponseDto>>> GetCapsuleMailsAsync(int userId, MailListQueryDto queryDto);
+        Task<ApiResponse<CapsuleMailDetailResponseDto>> GetCapsuleMailByIdAsync(int userId, int mailId);
+        Task<ApiResponse<CapsuleMailDetailResponseDto>> UpdateCapsuleMailAsync(int userId, int mailId, UpdateCapsuleMailDto updateDto);
+        Task<ApiResponse<bool>> RevokeCapsuleMailAsync(int userId, int mailId);
+        
+        // 发送至未来功能
+        Task<ApiResponse<SendToFutureResponseDto>> SendToFutureAsync(int userId, SendToFutureDto sendToFutureDto);
     }
 }