Add progress analytics dashboard

[Darshini240906]

Related Issue

Closes #989

Summary

Added a Progress Analytics Dashboard that provides visual insights into study performance and productivity. Users can now track their learning progress through charts, subject-wise analytics, and study streak metrics.

Changes Made

• Added Progress Analytics Dashboard page/component
• Implemented monthly progress visualization using bar charts
• Added daily/weekly task completion trend analysis
• Added subject-wise progress breakdown
• Implemented study streak tracking
• Improved UI for displaying analytics data
• Integrated analytics with existing task completion data

Testing

• Tested all analytics components locally
• Verified charts render correctly with study/task data
• Checked subject-wise statistics calculations
• Verified study streak tracking functionality
• Confirmed responsive layout and UI behavior
• No console errors observed during testing

Screenshots

Add screenshots of:

• Progress Analytics Dashboard
• Monthly progress chart
• Subject-wise breakdown
• Study streak section

Checklist

• Code follows project style
• Tested locally
• No unrelated changes included
• Documentation updated (if applicable)