feat(qr+devtools): scan qr code and dev tools

lib/features/auth/presentation/pages/auth_screen.dart

@@ -88,10 +88,10 @@ class _AuthScreenState extends State<AuthScreen> {
               title: GestureDetector(
                 onTap: () {
                   tapsCount++;
-                  if (tapsCount == 6) {
+                  if (tapsCount == 7) {
                     tapsCount = 0;
+                    GoRouter.of(context).pushNamed(DevToolsScreen.name);
                   }
-                  GoRouter.of(context).pushNamed(DevToolsScreen.name);
                 },
                 child: SvgPicture.asset(
                   ImageConstant.imgLogoEatvio,
@@ -244,7 +244,7 @@ class _AuthScreenState extends State<AuthScreen> {
                           height: 48,
                           width: 48,
                           child: FloatingActionButton.extended(
-                            heroTag: 'authButton',
+                            heroTag: 'scanQrCodeButton',
                             highlightElevation: 0,
                             elevation: 0,
                             focusElevation: 0,

lib/features/auth/presentation/pages/scan_qr_code_screen.dart

@@ -1,4 +1,14 @@
+import 'dart:io';
+
+import 'package:dio/dio.dart';
+import 'package:eatvio_app/core/app_router.dart';
+import 'package:eatvio_app/core/const.dart';
+import 'package:eatvio_app/core/locator_service.dart';
+import 'package:eatvio_app/core/token_storage.dart';
+import 'package:eatvio_app/core/utils/toasts.dart';
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:qr_code_scanner_plus/qr_code_scanner_plus.dart';
 
 class ScanQRCodeScreen extends StatefulWidget {
   const ScanQRCodeScreen({super.key});
@@ -8,6 +18,20 @@ class ScanQRCodeScreen extends StatefulWidget {
 }
 
 class _ScanQRCodeScreenState extends State<ScanQRCodeScreen> {
+  final GlobalKey qrKey = GlobalKey(debugLabel: 'QR');
+  Barcode? result;
+  QRViewController? controller;
+
+  @override
+  void reassemble() {
+    super.reassemble();
+    if (Platform.isAndroid) {
+      controller!.pauseCamera();
+    } else if (Platform.isIOS) {
+      controller!.resumeCamera();
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -15,6 +39,52 @@ class _ScanQRCodeScreenState extends State<ScanQRCodeScreen> {
         title: const Text('Сканирование QR-кода'),
         centerTitle: true,
       ),
+      body: Column(
+        children: <Widget>[
+          Expanded(
+            child: QRView(
+              key: qrKey,
+              onQRViewCreated: _onQRViewCreated,
+            ),
+          ),
+        ],
+      ),
     );
   }
+
+  void _onQRViewCreated(QRViewController controller) {
+    this.controller = controller;
+    controller.scannedDataStream.listen((scanData) async {
+      setState(() {
+        result = scanData;
+      });
+      controller.pauseCamera();
+      try {
+        final scannedUrl = scanData.code;
+        final uri = Uri.parse(scannedUrl ?? '');
+        final scannedBaseUrl = (uri.hasAuthority) ? '${uri.scheme}://${uri.host}' : '';
+        baseUrl = scannedBaseUrl;
+        sl<Dio>().options.baseUrl = baseUrl;
+        final response = await Dio().getUri(
+          uri,
+          options: Options(
+            headers: {
+              'accept': 'application/json',
+              'content-type': 'application/json',
+            },
+          ),
+        );
+        final token = response.data['token'];
+        await TokenStorage.saveTokenInStorage(token);
+        AppRouter.navigatorKey.currentContext?.go(
+          '/feed-screen',
+          extra: {'needToInitializeWebSocket': false},
+        );
+        showSuccessToast('Добро пожаловать!');
+      } catch (e) {
+        controller.resumeCamera();
+        showErrorToast('Что-то пошло не так, попробуйте обновить страницу с qr кодом или используйте вход через логин и пароль');
+      }
+    });
+  }
 }