feat: add back button to all necessary flows in UI

[eleanorjboyd]

fixes #523 and #855

[vs-code-engineering]

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[Copilot]

Pull Request Overview

This PR adds back button functionality to all necessary UI flows within the extension, addressing issues #523 and #855. The changes implement a step-based wizard pattern that allows users to navigate backward through the environment creation process.

• Refactors the Conda environment creation flow to use a step-based wizard pattern with back navigation
• Refactors the venv creation flow to support back navigation through all steps
• Adds back button support to the PET (Python Environment Tool) terminal functionality
• Updates various UI helpers to support back navigation through buttons

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/managers/conda/condaUtils.ts	Exports utility functions and replaces inline flow with step-based Conda flow
src/managers/conda/condaStepBasedFlow.ts	New file implementing step-based Conda environment creation with back navigation
src/managers/builtin/venvUtils.ts	Replaces inline venv creation logic with step-based flow
src/managers/builtin/venvStepBasedFlow.ts	New file implementing step-based venv creation with back navigation
src/helpers.ts	Refactors PET terminal functionality to support back navigation
src/extension.ts	Updates to use refactored PET terminal functionality
src/common/pickers/managers.ts	Adds back button support to manager picker

Comments suppressed due to low confidence (2)

src/managers/conda/condaStepBasedFlow.ts:1

• This creates infinite recursion. The function calls createCondaEnvironment which calls createStepBasedCondaFlow, but this code is already within that flow. The back navigation should return to the step-based flow, not restart the entire process.

import * as fse from 'fs-extra';

src/managers/conda/condaStepBasedFlow.ts:1

• Same infinite recursion issue as above. This should return to the step-based flow rather than calling createCondaEnvironment again.

import * as fse from 'fs-extra';

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[vs-code-engineering]

⚠️ This PR originates from a fork. Due to security restrictions, pipelines from forks are no longer triggered automatically. Learn more.

If the changes appear safe, you can manually trigger the pipeline by commenting /AzurePipelines run.