Implement complete Quest4Fun educational Flutter app with core features and UI

[Copilot]

This PR implements a complete educational Flutter application for children from the ground up, transforming the repository from a minimal README-only state into a fully functional app with comprehensive features.

🎯 Overview

Quest4Fun is an interactive educational app designed to make learning fun for children through gamification, engaging visuals, and progress tracking. The app follows a kid-friendly design philosophy with bright colors, big tappable buttons, and minimal text reliance.

🚀 Key Features Implemented

Core Application Structure

• Flutter Project Setup: Complete project structure with pubspec.yaml, proper dependencies, and platform configurations
• Kid-Friendly Theme: Custom theme with bright cartoon colors (blue, yellow, green, orange) and Comic Sans font family
• Navigation System: Go Router implementation for clean URL-based routing between screens
• State Management: Provider pattern for reactive UI updates and data flow

User Experience Flow

1. Splash Screen: Animated logo with mascot, smooth transitions, and automatic navigation based on onboarding status
2. Onboarding: Three-step process with welcome message, avatar selection (6 different options), and name input
3. Home Screen: Subject cards for Math, English, EVS, and Science with progress indicators and reward tracking
4. Learning Screen: Game map style layout with level nodes, difficulty indicators, and progressive unlocking
5. Parent Dashboard: PIN-protected (demo PIN: 1234) analytics showing detailed progress reports and tips

Technical Architecture

• Services Layer:
  • AuthService: Handles user authentication, onboarding completion, and parent PIN verification
  • ProgressService: Manages learning progress, rewards (stars/coins/badges), and subject unlocking logic
• Models: UserModel with proper JSON serialization for local storage
• Widgets: Reusable components including SubjectCard, LevelNode, AvatarSelector, and ProgressIndicatorWidget
• Local Storage: SharedPreferences integration for offline data persistence

Platform Support

• Android: Complete configuration with build.gradle, AndroidManifest.xml, and MainActivity
• iOS: Basic Info.plist configuration for iOS deployment
• Development: DevContainer configuration for GitHub Codespaces with Flutter SDK and extensions

🎨 Design Philosophy

The app follows child-centric design principles:

• Large, easily tappable interface elements
• Bright, engaging color scheme with subject-specific colors
• Smooth animations and visual feedback
• Progressive difficulty with achievement-based unlocking
• Hidden parent section requiring PIN authentication

🛠️ Development Ready

The implementation includes:

• Proper .gitignore and .metadata files
• DevContainer configuration for immediate Codespaces development
• Comprehensive README.md with setup instructions and project documentation
• Clean, maintainable code structure following Flutter best practices

📱 Current Functionality

• Working onboarding flow with data persistence
• Functional navigation between all major screens
• Progress tracking system with local storage
• Reward mechanics (stars, coins, badges)
• Parent dashboard with real-time progress display
• Subject unlocking logic based on completion percentage

The app is ready for immediate development, testing, and further feature implementation as outlined in the project roadmap.

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