Fix PSReadline for screen reader

[anthonykim1]

Part of: #297146

Problem1:

• Red error: Import-Module $specialPsrlPath runs without checking if the folder exists. In production builds, the psreadline/ folder isn't there → red error in terminal.

• Unreachable Set-PSReadLineOption -EnableScreenReaderModesince pwsh 7.5+ loaded stripped down version of psreadline 2.3.6. which gave the"WARNING: PowerShell detected that you might be using a screen reader and has disabled PSReadLine as it may not work correctly with your screen reader. If you want to re-enable it, run 'Import-Module PSReadLine'." We need the bundled 2.3.4-beta3 that has theEnableScreenReaderMode` param.

EnableScreenReaderMode is available starting PS ReadLine 2.4.3+ which is more screen reader friendly.
Pre-PR, the code was prevented from setting Set-PSReadLineOption EnableScreenReaderMode

Problem 2: Bundled PSReadLine not shipped in production builds
Symptom: Import-Module threw a red error in production VS Code because the psreadline/ folder didn't exist — it was only present in dev builds??

• Fix should be editing gulpfiles also adding Test-Path guard to be safer.

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Holding off on below until clarification --> #297146 (comment)
Problem 3: CopyRight banner

• Use -nologo when accessibility mode enabled.

[Copilot]

Pull request overview

Improves PowerShell terminal startup behavior for screen reader users by ensuring a compatible PSReadLine can be loaded/enabled in a11y mode, reducing startup noise, and shipping the bundled PSReadLine assets in production builds.

Changes:

• Update PowerShell shell integration to prefer importing the bundled PSReadLine (when present), fall back to the system PSReadLine, and enable EnableScreenReaderMode when supported.
• Inject -nologo into PowerShell launch args when isScreenReaderOptimized is enabled.
• Include the psreadline/** directory in desktop and server build resource include lists.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
src/vs/workbench/contrib/terminal/common/scripts/shellIntegration.ps1	Adjust PSReadLine import logic in a11y mode and enable screen-reader mode when available.
src/vs/platform/terminal/node/terminalEnvironment.ts	Add -nologo when launching PowerShell with screen-reader-optimized mode.
build/gulpfile.vscode.ts	Ensure bundled psreadline/** assets are included in desktop build resources.
build/gulpfile.reh.ts	Ensure bundled psreadline/** assets are included in server/REH build resources.

[vs-code-engineering]

📬 CODENOTIFY

The following users are being notified based on files changed in this PR:

@lszomoru

Matched files:

• build/azure-pipelines/win32/codesign.ts

@Tyriar

Matched files:

• src/vs/platform/terminal/node/terminalEnvironment.ts

[meganrogge]

Nice!