update README.md

lib/screens/welcome_screen.dart

@@ -33,7 +33,7 @@ class WelcomeScreen extends StatelessWidget {
                 
                 // 标题
                 const Text(
-                  'sight-identification',
+                  '自动拍照应用',
                   style: TextStyle(
                     fontSize: 32,
                     fontWeight: FontWeight.bold,
@@ -46,7 +46,7 @@ class WelcomeScreen extends StatelessWidget {
                 Padding(
                   padding: const EdgeInsets.symmetric(horizontal: 40),
                   child: Text(
-                    '点击按钮开始自动拍照\n每2秒拍摄一次',
+                    '点击按钮开始自动拍照\n每2秒拍摄一次，共拍摄5张照片',
                     textAlign: TextAlign.center,
                     style: TextStyle(
                       fontSize: 16,

lib/services/yolo_service.dart

@@ -76,7 +76,7 @@ class BoundingBox {
 
 class YOLOService {
   // 配置YOLO API端点（用户可以修改）
-  static const String yoloApiUrl = 'http://10.168.2.249:3000/api/upload';
+  static const String yoloApiUrl = 'http://localhost:8000/api/detect';
   
   // 分析单张图片
   Future<YOLOAnalysisResult> analyzeImage(String imagePath) async {