Removed duplicate script tags for config.js and script.js in the body.

Added 'defer' attribute to script tags for better loading performance.

Refactor student action buttons for better layout and add edit functionality.

Added functions to open and edit student modal, and clear input fields.

Added functions to prepare and edit student information in a modal.

Removed the editStudent function that was responsible for editing student details in the modal.

Refactor openAddStudentModal function and enhance assignment upsert logic.

Refactor CSS variables and styles for improved design and consistency.

Updated color variables and styles for various elements, including background, text, and buttons. Improved layout and responsiveness for better user experience.

Updated header background to a gradient and enhanced button styles.

Replaced .dna-container with .dna-canvas-wrap and updated related styles for a canvas-based helix animation.

Removed header comments and adjusted styles for responsive design.

Added script tag to include dna.js for functionality.

Added function to ensure grade rows for students based on classroom assignments and updated student import process to create grade rows for imported students.

Removed header comments and added white-space property to badge class.