通过在扫描仪对话框中启用自动缩放和改进错误处理来重构QR码扫描功能。更新ScanQrCodePage以利用AppQrScannerDialog获取玩家ID。

lib/shared/widgets/app_qr_scanner_dialog.dart

@@ -41,6 +41,7 @@ class _AppQrScannerDialogState extends State<AppQrScannerDialog>
       detectionSpeed: DetectionSpeed.noDuplicates,
       facing: CameraFacing.back,
       formats: const [BarcodeFormat.qrCode],
+      autoZoom: true,
     );
     _scanLineController = AnimationController(
       vsync: this,
@@ -59,25 +60,36 @@ class _AppQrScannerDialogState extends State<AppQrScannerDialog>
     if (_hasScanned || capture.barcodes.isEmpty) return;
 
     final value = capture.barcodes.first.rawValue;
-    print('value:$value');
-    return;
-
     if (value == null || value.isEmpty) return;
 
     _hasScanned = true;
     final navigator = Navigator.of(context, rootNavigator: true);
+    debugPrint('扫码结果: $value');
+    if (!mounted) return;
+    if (navigator.canPop()) {
+      navigator.pop(value);
+    }
+    unawaited(_stopScanner());
+  }
+
+  void _handleDetectError(Object error, StackTrace stackTrace) {
+    debugPrint('扫码识别失败: $error');
+  }
+
+  Future<void> _stopScanner() async {
     try {
       await _controller.stop();
     } catch (error) {
       debugPrint('停止扫码相机失败: $error');
     }
-
-    if (!mounted) return;
-    navigator.pop(value);
   }
 
   void _close() {
-    Navigator.of(context, rootNavigator: true).pop();
+    if (!mounted) return;
+    final navigator = Navigator.of(context, rootNavigator: true);
+    if (navigator.canPop()) {
+      navigator.pop();
+    }
   }
 
   Rect _scanWindowFor(Size size) {
@@ -101,8 +113,8 @@ class _AppQrScannerDialogState extends State<AppQrScannerDialog>
                 child: MobileScanner(
                   controller: _controller,
                   fit: BoxFit.cover,
-                  scanWindow: scanWindow,
                   onDetect: _handleDetect,
+                  onDetectError: _handleDetectError,
                   errorBuilder: _buildCameraError,
                   placeholderBuilder: (_) => const ColoredBox(
                     color: Colors.black,