[Content] Improve image thumbnails

[finnar-bin]

Show the appropriate thumbnail for non-image files
Resolves #3206

[Copilot]

Pull Request Overview

This PR improves the image thumbnail display by introducing file data lookup logic and using a dedicated preview component for non-image files. Key changes include:

• Updating ImageCell to query file details via the media manager and render a FileTypePreview.
• Simplifying the image URL extraction logic in ItemList.
• Correcting the ecoId property to ecoID in the Favicon component.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
src/apps/content-editor/src/app/views/ItemList/TableCells/ImageCell.tsx	Implements file data retrieval and conditional rendering for image/non-image thumbnails.
src/apps/content-editor/src/app/views/ItemList/index.tsx	Simplifies image URL extraction by removing legacy resolution logic.
src/shell/components/Favicon/index.tsx	Updates property name for consistency with store types.

Comments suppressed due to low confidence (1)

src/apps/content-editor/src/app/views/ItemList/TableCells/ImageCell.tsx:96

• Rendering FileTypePreview without ensuring that fileData is present may lead to UI issues. Consider adding a conditional check to render a placeholder or skeleton until fileData is available.

<FileTypePreview isMediaThumbnail src={fileData?.url} filename={fileData?.filename} updatedAt={fileData?.updated_at} />