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feat: Refactor app.js into feature-based modules for improved maintainability #1204

Description

@sonal-jakhar

Problem

The current app.js file handles multiple unrelated responsibilities, including task management, calendar rendering, authentication, file upload, AI task extraction, profile rendering, downloads, streak management, and event listeners. As the project grows, this makes the file difficult to navigate, debug, review, and maintain.

Proposed Improvement

Refactor the frontend by separating feature-specific logic into dedicated modules while preserving the existing functionality and UI behavior.

A possible structure could be:

frontend/
 ├── app.js
 ├── modules/
 │   ├── tasks.js
 │   ├── calendar.js
 │   ├── auth.js
 │   ├── upload.js
 │   ├── extraction.js
 │   ├── profile.js
 │   ├── streak.js
 │   └── downloads.js

The main app.js would only be responsible for initializing the application and coordinating these modules.

Why improvement is needed

  • Improves code readability.
  • Makes debugging easier.
  • Encourages separation of concerns.
  • Simplifies future feature development.
  • Makes code reviews smaller and more manageable.
  • Improves long-term maintainability of the project.

Expected Result

  • app.js becomes significantly smaller and easier to understand.
  • Feature-specific logic is organized into dedicated modules.
  • No changes to existing functionality or UI behavior.
  • Future contributors can work on individual modules without affecting unrelated parts of the application.

Alternatives Considered

An alternative would be to keep all logic inside app.js and improve it with comments or sectioning. However, as the project continues to grow, a modular structure provides better scalability and maintainability than a single large file.

Additional Context

This is a code refactoring and maintainability improvement only. The goal is to reorganize the existing implementation without introducing new features or changing the application's behavior.

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