final improvements

added internet permission in manifest
added unique app bar titles for each section
fixed card layout
fixed card details page layout
added appbar button for toggling dark mode

lib/components/locale/l10n/app_localizations.dart

@@ -107,6 +107,12 @@ abstract class AppLocale {
   /// **'Cryptocurrency info'**
   String get detailsPageAppBarTitle;
 
+  /// No description provided for @favouritesPageAppBarTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Favourites'**
+  String get favouritesPageAppBarTitle;
+
   /// No description provided for @settingsPageAppBarTitle.
   ///
   /// In en, this message translates to:

lib/components/locale/l10n/app_localizations_en.dart

@@ -12,6 +12,9 @@ class AppLocaleEn extends AppLocale {
   @override
   String get detailsPageAppBarTitle => 'Cryptocurrency info';
 
+  @override
+  String get favouritesPageAppBarTitle => 'Favourites';
+
   @override
   String get settingsPageAppBarTitle => 'Settings';
 

lib/components/locale/l10n/app_localizations_ru.dart

@@ -12,6 +12,9 @@ class AppLocaleRu extends AppLocale {
   @override
   String get detailsPageAppBarTitle => 'Сведения о валюте';
 
+  @override
+  String get favouritesPageAppBarTitle => 'Избранное';
+
   @override
   String get settingsPageAppBarTitle => 'Настройки';