fix(media-preview): support untitled audio documents

[Abhishek Tripathi (Abhi-05-git)]

Description

Fixes support for opening and previewing untitled audio documents in the Media Preview extension.

Previously, AudioPreviewProvider did not preserve the contents of untitled documents when VS Code created the custom document. As a result, the audio preview could not reliably access the in-memory data for an untitled audio document.

This change updates the custom document lifecycle to carry the untitled document data through to the audio preview.

Changes

• Added AudioPreviewDocument extending vscode.CustomDocument.
• Added untitledDocumentData to preserve in-memory audio content.
• Updated openCustomDocument to receive and store CustomDocumentOpenContext.
• Passed untitledDocumentData from the custom document into AudioPreview.
• Updated the resolveCustomEditor typing to use the new AudioPreviewDocument.
• Preserved the existing document URI and dispose lifecycle.

Technical Details

The implementation uses VS Code's CustomDocumentOpenContext.untitledDocumentData to retain the contents of untitled audio documents.

This allows AudioPreview to receive the in-memory Uint8Array data directly instead of relying only on a URI, which is important for documents that have not been saved to disk.

Validation

• ESLint passed for the modified file.
• The change was committed and pushed successfully.

Related

This addresses the handling of untitled audio documents in the Media Preview extension.

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[Abhishek Tripathi (Abhi-05-git)]

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