Request to add color on lock files

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Feature request

Which Nextcloud Version are you currently using: (see administration page)

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Describe the solution you'd like
I will like to see this app indicate that a file is lock with a bacground color.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

The issue names no files, tests, or entry points. Start by locating the JavaScript UI that renders locked files, then determine how the lock state is exposed and where a background color would be applied. Done means locked files are visibly distinguished and the behavior is covered by the project's relevant checks.