Implemented Adaptive Difficulty Level

[hudazaan]

Description

This PR implements a sophisticated adaptive difficulty system that dynamically adjusts question difficulty based on user performance during quizzes. The system automatically makes questions harder when users excel and easier when they struggle, creating a personalized learning experience.

Features Added

🔄 Adaptive Behavior

• 2 correct answers in a row → Difficulty increases (Medium → Hard)
• 1 incorrect answer → Difficulty decreases (Hard → Medium, Medium → Easy)
• Overall accuracy below 50% → Emergency difficulty reduction

🎨 User Experience

• Adaptive mode toggle in quiz setup
• Real-time difficulty indicators on each question
• Smooth difficulty change animations
• Clear visual feedback for difficulty transitions

Technical Implementation

Key Components

1. Question Pool Management - Pre-generates questions for all difficulty levels (Easy, Medium, Hard)
2. Performance Tracking - Monitors streaks and accuracy patterns
3. Dynamic Question Replacement - Updates future questions in real-time based on answer accuracy
4. State Management - Tracks current difficulty and performance history
5. Visual feedback when difficulty changes

Files Modified

• src/App.jsx - Main adaptive logic implementation
• src/index.css - New styles for adaptive elements
• api/getGeminiResponse.js - Enhanced prompts for difficulty-specific questions
• src/services/quizService.js - Adaptive mode data tracking

Fixes Issue #10. Thank you for reviewing my PR. Looking forward to more meaningful contributions!! 🚀

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