Build Statistics Dashboard with Charts

Title: Create Personal Analytics Page with Comprehensive Performance Charts

Problem Statement

Users lack detailed insights into their performance trends, learning patterns, and areas for improvement. A statistics dashboard would provide valuable analytics to help users track progress and optimize their learning.

Proposed Solution

Create a comprehensive statistics/analytics page featuring:

• Performance over time graphs
• Category-wise accuracy charts
• Time management analytics
• Comparative performance metrics
• Heatmap of quiz activity
• Downloadable reports

Acceptance Criteria

✅ Dashboard Layout

• Grid layout with multiple stat cards
• Responsive design (mobile/tablet/desktop)
• Collapsible sections for detailed views
• Date range selector (Last 7/30/90 days, All time)
• Export dashboard as PDF/PNG button
• Print-friendly version

✅ Performance Over Time Graph

• Line chart showing score trends
• X-axis: Date, Y-axis: Score percentage
• Multiple lines for different categories (optional)
• Interactive tooltips on hover
• Zoom and pan functionality
• Highlight personal best points
• Show trend line (moving average)

✅ Category Performance Chart

• Horizontal bar chart or radar chart
• Show accuracy percentage per category
• Color-coded bars (red/yellow/green)
• Sort options (Best to Worst, A-Z)
• Click bar to filter detailed questions
• Display question count per category

✅ Time Analytics

• Pie chart: Time distribution across categories
• Average time per question stat card
• Fastest quiz completion time
• Total time spent on quizzes
• Time of day heatmap (hour vs. day)
• Peak performance hours indicator

✅ Accuracy Analytics

• Overall accuracy percentage (large stat card)
• Accuracy by difficulty level (Easy/Medium/Hard)
• Most missed question types
• Improvement rate graph (week over week)
• Consecutive correct answers streak

✅ Activity Heatmap

• Calendar heatmap (GitHub-style)
• Color intensity based on quizzes completed
• Hover shows date and quiz count
• Current streak and longest streak display
• Perfect days (100% score) highlighted
• Gap identification for inactive periods

✅ Comparative Metrics

• Your rank vs. average user (simulated)
• Percentile ranking display
• Better/worse than average indicators
• Category-specific comparisons
• Speed vs. accuracy scatter plot

✅ Summary Cards

• Total quizzes completed
• Average score percentage
• Total time spent
• Current streak
• Highest score
• Total achievements earned
• Most improved category

✅ Detailed Tables

• Paginated table of all quiz attempts
• Columns: Date, Category, Score, Time, Questions
• Sort by any column
• Filter by date range, category, score range
• Export table as CSV
• Click row to view full quiz results

✅ Export Functionality

• Download dashboard as PDF
• Include all charts and summary stats
• Professional formatting
• Date range in filename
• Option to include or exclude graphs