Feat/subject task filtering

[Radhika252007]

Related Issue

Closes #713

Summary

Implemented a subject-based task filtering feature that allows users to view tasks associated with a selected subject. This improves task organization and usability for users managing multiple subjects. User can click on the Subject on the sidebar and tasks section will filter the tasks based on subjects.

Changes Made

• Added subject-based filtering functionality
• Implemented dynamic task filtering without page refresh
• Updated task display logic for selected subjects
• Improved overall task management experience

Testing

• Tested filtering tasks for multiple subjects
• Verified dynamic updates when switching subjects
• Confirmed correct rendering of filtered task lists
• Tested locally for UI consistency and functionality

Checklist

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