fix: add keyboard navigation to clickable card elements

[hivecommons-hive]

Refs #24440 (partial: covers the clickable divs listed in web/src/components/cards/; remaining ~250 truncated findings across other directories left for follow-up PRs per the issue's keep-PRs-small guidance)

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[github-actions]

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[github-actions]

✅ Test Coverage Check

All new source files in this PR have corresponding test files.

Checked web/src/hooks/ and web/src/components/ against origin/main.

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[hivecommons-hive]

hive/awaiting-ci: CI pending — sweep will merge when green.

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[github-actions]

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Post-merge build verification passed ✅

Both Go and frontend builds compiled successfully against merge commit ffa5616895d5a389167ae4ca351395a275a2ff6b.

[github-actions]

⏹️ Post-Merge Verification: cancelled

Commit: ffa5616895d5a389167ae4ca351395a275a2ff6b
Specs run: Dashboard.spec.ts smoke.spec.ts
Report: https://github.com/kubestellar/console/actions/runs/39192370329