Add automated screenshot generation and update icons

Introduces integration tests and fastlane configuration for automated screenshot generation across multiple languages and devices. Updates app icons for Android, iOS, macOS, and Windows platforms. Adds new images and web icons, updates .gitignore for Ruby/Bundler, and modifies dependencies to support integration testing.

Author: dbsectrainer

.gitignore

@@ -70,6 +70,10 @@ ios/Flutter/flutter_assets/
 ios/ServiceDefinitions.json
 ios/Runner/GeneratedPluginRegistrant.*
 
+# Bundler (Ruby)
+ios/vendor/bundle/
+ios/.bundle/
+
 # Web specific
 web/flutter.js
 
@@ -82,3 +86,4 @@ coverage/
 *.swp
 *.swo
 .idea/
+/vendor

android/app/src/main/res/mipmap-hdpi/ic_launcher.png

@@ -0,0 +1,114 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:integration_test/integration_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:polyglot_pathways/main.dart' as app;
+
+void main() {
+  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+
+  // Get language from environment variable or default to 'en'
+  const String languageCode = String.fromEnvironment(
+    'SCREENSHOT_LANGUAGE',
+    defaultValue: 'en',
+  );
+
+  group('Screenshot Tests', () {
+    testWidgets('Generate screenshots for $languageCode', (WidgetTester tester) async {
+      // Clear SharedPreferences to start fresh
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.clear();
+
+      // Set the language
+      await prefs.setString('selectedLanguage', languageCode);
+      
+      // Set onboarding as completed so we can navigate to main screens
+      await prefs.setBool('has_completed_onboarding', true);
+
+      // Build the app
+      await tester.pumpWidget(app.MyApp(prefs: prefs));
+      await tester.pumpAndSettle(const Duration(seconds: 2));
+
+      // Wait for any animations
+      await Future.delayed(const Duration(milliseconds: 500));
+
+      // Screenshot: Home Screen
+      await takeScreenshot(tester, '01_home');
+
+      // Navigate to Achievements tab
+      await tester.tap(find.text('Achievements').last);
+      await tester.pumpAndSettle(const Duration(seconds: 2));
+      await Future.delayed(const Duration(milliseconds: 500));
+      await takeScreenshot(tester, '02_achievements');
+
+      // Navigate to Profile tab
+      await tester.tap(find.text('Profile').last);
+      await tester.pumpAndSettle(const Duration(seconds: 2));
+      await Future.delayed(const Duration(milliseconds: 500));
+      await takeScreenshot(tester, '03_profile');
+
+      // Navigate to Settings tab
+      await tester.tap(find.text('Settings').last);
+      await tester.pumpAndSettle(const Duration(seconds: 2));
+      await Future.delayed(const Duration(milliseconds: 500));
+      await takeScreenshot(tester, '04_settings');
+
+      // Go back to Home tab
+      await tester.tap(find.text('Home').last);
+      await tester.pumpAndSettle(const Duration(seconds: 2));
+      await Future.delayed(const Duration(milliseconds: 500));
+
+      // Try to open language selection - look for language cards more carefully
+      // First, scroll if needed to see language cards
+      try {
+        final scrollable = find.byType(Scrollable);
+        if (scrollable.evaluate().isNotEmpty) {
+          await tester.drag(scrollable.first, const Offset(0, -200));
+          await tester.pumpAndSettle(const Duration(seconds: 1));
+        }
+      } catch (e) {
+        // Ignore if scroll fails
+      }
+      
+      // Try to find and tap a language card by looking for InkWell widgets
+      // that are likely language cards (they're tappable)
+      try {
+        final inkWells = find.byType(InkWell);
+        if (inkWells.evaluate().length > 2) {
+          // Skip the first few (might be navigation), tap a language card
+          await tester.tap(inkWells.at(2));
+          await tester.pumpAndSettle(const Duration(seconds: 2));
+          await Future.delayed(const Duration(milliseconds: 500));
+          await takeScreenshot(tester, '05_language_selection');
+          
+          // Try to close the sheet and go back
+          final closeButton = find.byIcon(Icons.close);
+          if (closeButton.evaluate().isNotEmpty) {
+            await tester.tap(closeButton.first);
+            await tester.pumpAndSettle(const Duration(seconds: 1));
+          }
+        }
+      } catch (e) {
+        // If language selection fails, continue with onboarding screens
+        print('Could not capture language selection: $e');
+      }
+
+      // For onboarding screens, we need to restart the app
+      // This is complex in integration tests, so we'll skip for now
+      // and focus on the main app screens which are more important
+    });
+  });
+}
+
+Future<void> takeScreenshot(WidgetTester tester, String name) async {
+  await tester.binding.defaultBinaryMessenger.handlePlatformMessage(
+    'flutter/screenshot',
+    null,
+    (ByteData? data) {},
+  );
+  
+  await IntegrationTestWidgetsFlutterBinding.instance.takeScreenshot(name);
+}
+

android/app/src/main/res/mipmap-mdpi/ic_launcher.png

@@ -0,0 +1,2 @@
+3.2.9
+

android/app/src/main/res/mipmap-xhdpi/ic_launcher.png

@@ -0,0 +1,9 @@
+source "https://rubygems.org"
+
+# Fastlane version - update as needed
+# You can check your installed version with: fastlane --version
+gem "fastlane", ">= 2.229.0"
+
+plugins_path = File.join(File.dirname(__FILE__), 'fastlane', 'Pluginfile')
+eval_gemfile(plugins_path) if File.exist?(plugins_path)
+