feat(readme): 更新AI/ML功能和改进模型检测精度更新README以反映AI/ML功能的最新进展，包括模型在检测拼图时的改进。

修正了代码中的一个小错误，并整理了TODO列表的格式。fix(yolov8_detector):修正检测框类别名称的赋值逻辑

确保在yolov8_detector.dart中为检测框正确分配类别名称。
调整了条件运算符以避免潜在的空值。

refactor(yolov8_input):调整导入路径

重构yolov8_input.dart中的导入语句，以符合项目结构。

refactor(yolov8_output):调整导入路径

重构yolov8_output.dart中的导入语句，以符合项目结构。

README.md

@@ -10,26 +10,37 @@
 
 an open source Sudoku game application powered by Flutter .
 
-you can build the Sudoku Game just  for your own.
+you can build your own Sudoku Game app, which allows you to quickly learn dart/flutter and its ecologically related application techniques, and is very friendly and instructional for tiro .
 
-Download apk for android (preview) -> [github release page](https://github.com/einsitang/sudoku-flutter/releases)
+
+
+### recent: 
+
+feature of AI/ML sudoku detect to solver is basically available now , welcome to try and feedback .
+
+[![document/img/sudoku-detect-bilibili-demo.png](document/img/sudoku-detect-bilibili-demo.png)](https://www.bilibili.com/video/BV1BKYteEEer)
+
+<div style="text-align: center;"> <b>watch</b>: ai solver demo video </div>
+
+about AI/ML model is train by **yolov8** , you can also visit [ultralytics](https://github.com/ultralytics/ultralytics) to know more
+
+download latest release  apk for android (preview) -> [github release page](https://github.com/einsitang/sudoku-flutter/releases)
 
 
 
 ## screenshots
 
+### iOS
+
 ![Bootstrap](./document/img/WX20230312-193408.jpg)![Game](./document/img/WX20230312-193423.jpg)
 
-recent update
 
-### bilibili video
-https://www.bilibili.com/video/BV1BKYteEEer
 
 
 ## plan-to-do
-- [:bangbang:] AI sudoku solver with camera - working well :-)
-- amendable detection puzzle on  AI Solver
-- AI MODELS optimize with "amendable detection cell"
+- :ballot_box_with_check: AI sudoku solver with camera - working well :-)
+- :black_square_button: amendable detection puzzle on  AI Solver
+- :black_square_button: AI MODELS optimize with "amendable detection cell"
 
 
 ## environment
@@ -106,9 +117,6 @@ $> flutter build iOS
 $> flutter build apk
 ```
 
-## more flutter features
-see the [Flutter](https://flutter.dev/) official website
-
 
 ## star history
 

lib/ml/yolov8/yolov8_detector.dart

@@ -146,7 +146,7 @@ class YoloV8Detector extends Predictor<YoloV8Input, YoloV8Output> {
       var classId = classIds[index];
       detectionBoxes.add(YoloV8DetectionBox(
         classId: classId,
-        className: classes[classId] ??= 'Unknown',
+        className: classes[classId] ?? 'Unknown',
         confidence: scores[index],
         x: x,
         y: y,

lib/ml/yolov8/yolov8_input.dart

@@ -1,8 +1,8 @@
 import 'dart:typed_data';
 
 import 'package:opencv_dart/opencv_dart.dart' as cv;
+import 'package:sudoku/ml/predictor.dart';
 
-import '../predictor.dart';
 
 /**
  * INPUT

lib/ml/yolov8/yolov8_output.dart

@@ -1,4 +1,4 @@
-import '../predictor.dart';
+import 'package:sudoku/ml/predictor.dart';
 
 /**
  * OUTPUT