feat: migrate Projects Index state to Angular component

[Supun-VinodIT]

Description

This PR completes the migration of the Projects Index state from AngularJS to Angular.
The previous implementation relied on an AngularJS state, controller, and template.
As part of the migration effort, I created a new Angular component and moved all
relevant logic, routing, and view behavior into the Angular framework.

I also cleaned up the old AngularJS state by disabling it so that the new Angular
component is now the source of truth for the Projects Index page.

This PR contains only the intended migration files.

Fixes # (issue) N/A

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

1. Starting the frontend application.
2. Logging in with default credentials.
3. Navigating to /projects/<validProjectId> and confirming the page loads.
4. Confirming the Angular component renders correctly.
5. Verifying that the project and unit data appear as expected.
6. Checking the browser console for errors — none found.
7. Confirming that the old AngularJS controller is no longer triggered.

Testing Checklist:

• Tested in latest Chrome
• Tested in latest Safari
• Tested in latest Firefox

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have requested a review

##Screenshots (Evidence)

Screenshot 1 - Projects Index Page Rendering

Shows the page loading at /projects/ with correct layout and navigation. Confirms that the new Angular component is rendering successfully and the user interface is visible.

Screenshot 2 - Console Showing No Errors

Displays the browser’s DevTools Console tab after refreshing the page. Confirms that there are no red errors or warnings related to the migrated component. Only expected optimization warnings from legacy modules are present.

Screenshot 3 - Network Tab Showing Successful API Calls

Shows the DevTools Network tab after page load. Confirms that getProject and getUnit API calls return 200 OK, verifying that project and unit data are loading correctly.

Screenshot 4 - Angular Component Folder Structure

Displays the file explorer in VS Code showing the new Angular component files inside src/app/projects/states/index/. Includes:

• index.component.ts
• index.component.html
• index.component.scss
  Confirms that the migration was scoped and structured correctly.

Screenshot 5 - Routing Configuration

Shows the route definition in app-routing.module.ts for projects/:projectId. Confirms that the new Angular component is registered with Angular Router and replaces the legacy AngularJS state.

How the behaviour can be tested / replicated by others

Anyone reviewing this PR can follow the steps below to confirm the migrated Projects Index state works as expected:

1. Start the frontend application
   Launch the Angular development server using the project’s standard startup command.

2. Sign in using any valid development credentials
   Once the app loads, log in with the default test credentials provided in the project documentation.

3. Navigate to the Projects Index route
   In the browser, go to:

   http://localhost:4200/projects/<validProjectId>
   

   Replace <validProjectId> with a project ID that exists in your local database.

4. Confirm the page renders correctly
   The Projects Index page should load without errors.
   If the user isn’t enrolled in a unit, the “not enrolled” message will appear - this is expected behaviour.

5. Check the browser console
   Open DevTools → Console and refresh the page.
   There should be no red errors.
   Any AngularJS optimisation warnings are normal and unrelated to this migration.

6. Check the Network tab
   Open DevTools → Network and refresh the page.
   API calls such as getProject and getUnit should return successful responses (e.g., 200 OK).

7. Verify routing behaviour

   • A valid project ID should load the Angular component.
   • An invalid project ID should redirect the user to /home.

8. Confirm the old AngularJS controller is no longer used
   The legacy ProjectsIndexStateCtrl should not appear in logs or be triggered during navigation.