Downloads Manager: Add file preview

[hugodemenez]

Description

This update adds file preview and metadata to the Manage Downloads command so you can see images and file details without opening the file.

New Features

• File preview in Manage Downloads: Image previews and metadata (file name, size, type, last modified, created) in the list detail view. On macOS, Quick Look is used for rich previews when an item is selected; on other platforms, image files show a preview.

Improvements

• Added utility function for Quick Look previews on macOS (getQuickLookPreviewDataUrl using ql-manage).
• Preview loads on selection (macOS) to avoid unnecessary work when scrolling.
• Added utility functions for file metadata (size, type, creation and modification date)

Screencast

Clipboard-20260201-111543-094.mp4

Folder navigation

folder-navigation.mp4

Checklist

• I read the extension guidelines
• I read the documentation about publishing
• I ran npm run build and tested this distribution build in Raycast
• I checked that files in the assets folder are used by the extension itself
• I checked that assets used in the README are located outside the metadata folder