feat(about): Add privacy policy and licenses

assets/translations/en.json

@@ -54,7 +54,8 @@
     "about_application_page": {
         "title": "About",
         "application_version_text": "Application version v.{}",
-        "api_version_text": "Server API version v.{}"
+        "api_version_text": "Server API version v.{}",
+        "privacy_policy": "Privacy policy"
     },
     "application_settings": {
         "title": "Application settings",

assets/translations/ru.json

@@ -54,7 +54,8 @@
     "about_application_page": {
         "title": "О приложении",
         "application_version_text": "Версия приложения v.{}",
-        "api_version_text": "Версия API сервера v.{}"
+        "api_version_text": "Версия API сервера v.{}",
+        "privacy_policy": "Политика конфиденциальности"
     },
     "application_settings": {
         "title": "Настройки приложения",

lib/ui/pages/more/about_application.dart

@@ -5,6 +5,7 @@ import 'package:selfprivacy/ui/components/brand_header/brand_header.dart';
 import 'package:selfprivacy/ui/components/brand_text/brand_text.dart';
 import 'package:package_info/package_info.dart';
 import 'package:easy_localization/easy_localization.dart';
+import 'package:url_launcher/url_launcher.dart';
 
 class AboutApplicationPage extends StatelessWidget {
   const AboutApplicationPage({super.key});
@@ -37,6 +38,26 @@ class AboutApplicationPage extends StatelessWidget {
                       .tr(args: [snapshot.data.toString()]),
                 ),
               ),
+              const SizedBox(height: 10),
+              // Button to call showAboutDialog
+              TextButton(
+                onPressed: () => showAboutDialog(
+                  context: context,
+                  applicationName: 'SelfPrivacy',
+                  applicationLegalese: '© 2022 SelfPrivacy',
+                  // Link to privacy policy
+                  children: [
+                    TextButton(
+                      onPressed: () => launchUrl(
+                        Uri.parse('https://selfprivacy.ru/privacy-policy'),
+                        mode: LaunchMode.externalApplication,
+                      ),
+                      child: Text('about_application_page.privacy_policy'.tr()),
+                    ),
+                  ],
+                ),
+                child: const Text('Show about dialog'),
+              ),
             ],
           ),
         ),

lib/ui/pages/setup/initializing/initializing.dart

@@ -122,7 +122,8 @@ class InitializingPage extends StatelessWidget {
                           },
                         ),
                       ),
-                      if (cubit.state is ServerInstallationEmpty)
+                      if (cubit.state is ServerInstallationEmpty ||
+                          cubit.state is ServerInstallationNotFinished)
                         Container(
                           alignment: Alignment.center,
                           child: BrandButton.text(