feat: phone_ide v2 concept

[Sembauke]

Checklist:

• I have read and followed the contribution guidelines.
• I have read and followed the how to open a pull request guide.
• My pull request targets the main branch of the repo.
• I have tested these changes locally on my machine.

Do not merge before freeCodeCamp/PhoneIDE#76

[Copilot]

Pull Request Overview

A concept implementation for Phone IDE v2 that integrates a local phone_ide package and refactors the challenge editor lifecycle in the app.

• Updated dependency to reference local phone_ide path.
• Added Editor state management and initialization in ChallengeViewModel.
• Refactored ChallengeView to consume the view model’s editor instance and updated file extension enum.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

File	Description
mobile-app/pubspec.yaml	Switched phone_ide dependency to a local path.
mobile-app/lib/ui/views/learn/challenge/challenge_viewmodel.dart	Added _editor/editorLanguage state, initEditor and setters.
mobile-app/lib/ui/views/learn/challenge/challenge_view.dart	Removed inline editor setup, now uses model.editor and loading spinner.
mobile-app/lib/enums/ext_type.dart	Extended Ext enum cases with a value field for string mapping.

Comments suppressed due to low confidence (2)

mobile-app/lib/ui/views/learn/challenge/challenge_viewmodel.dart:238

• [nitpick] Setter name 'setEditor' is redundant and non-idiomatic; consider using Dart's built-in setter syntax (e.g. 'set editor(Editor value)').

set setEditor(Editor editor) {

mobile-app/lib/ui/views/learn/challenge/challenge_viewmodel.dart:282

• Setter 'setMounted' is used here but not defined in the class, leading to a compile error; define a set setMounted(bool value) setter or update this usage.

setMounted = true;

[Nirajn2311]

The following error is thrown in the logs anytime any editor challenge is opened

Unhandled Exception: setState() called after dispose(): EditorState#c039f(lifecycle state: defunct, not mounted)
This error happens if you call setState() on a State object for a widget that no longer appears in the widget tree (e.g., whose parent widget no longer includes the widget in its build). This error can occur when code calls setState() from a timer or an animation callback.
The preferred solution is to cancel the timer or stop listening to the animation in the dispose() callback. Another solution is to check the "mounted" property of this object before calling setState() to ensure the object is still in the tree.
This error might indicate a memory leak if setState() is being called because another object is retaining a reference to this State object after it has been removed from the tree. To avoid memory leaks, consider breaking the reference to this object during dispose().
#0      State.setState.<anonymous closure> (package:flutter/src/w<…>

[Nirajn2311]

Resetting the code of a challenge removes the whole code completely across all regions

[Sembauke]

The following error is thrown in the logs anytime any editor challenge is opened

This issue has been fixed. It was due the widget not being mounted while calling state. I've also updated how we dispose and listen to subscriptions in phoneIDE and here. Now we should be correctly handling state and subscriptions according to Flutter.