fix: visual glitch when checking checkboxes

[JammingBen]

fixes #1223

[Copilot]

Pull Request Overview

This PR fixes a visual glitch that occurs when checking checkboxes in the ResourceTile component by refining the background color styling to only apply to unchecked checkboxes.

• Updates CSS selector to exclude checked checkboxes from background styling
• Modifies the ResourceTile component template and corresponding test snapshots

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/web-pkg/src/components/FilesList/ResourceTile.vue	Updates CSS class to conditionally apply background color only to unchecked checkboxes
packages/web-pkg/tests/unit/components/FilesList/snapshots/ResourceTile.spec.ts.snap	Updates test snapshots to reflect the new CSS class selector

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