fix(ui): refine CA cards and home rows

[Eli Bosley (elibosley)]

Outcome

Refines the Community Applications card experience from the 2026.07 release, using the Community Apps Worker card treatment as the reference for status semantics and hierarchy.

UI changes

• Keeps app cards at a fixed width and fills every full-card slot available in the home row.
• Replaces the faded full-card Show More overlay with a dedicated narrow trailing card, preserving the final app and exposing more content at once.
• Keeps Show More keyboard-accessible and verifies it opens the corresponding full section without opening an app sidebar.
• Improves status treatment:
  • UPDATE AVAILABLE instead of the misleading UPDATED.
  • UNRAID OFFICIAL and DOCKER OFFICIAL identify the authority without relying on color.
  • Unraid-official uses a solid success badge.
  • Stopped containers use a distinct warning state.
  • Dark badges use readable high-contrast text.

Verification

• Live-tested on Unraid 7.3.2-rc.1 at desktop width: three fixed app cards fill the row and the partial Show More card remains visible at the trailing edge.
• Live-tested Show More navigation into the full 3,530-result Recently Added view.
• php tests/test_card_badges.php
• PHP syntax checks for all changed PHP files.
• git diff --check

PR-preview infrastructure has been separated into #125 so it can be reviewed and merged independently.

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[Eli Bosley (elibosley)]

Community Applications preview

Install this PR build on a test server:

https://raw.githubusercontent.com/unraid/community.applications/pr-previews/pr/124/community.applications.plg

This is an unreleased test build. The same URL updates when new commits are pushed to this pull request.