[scanner] fix: split DynamicCard test coverage

[kubestellar-hive]

Fixes #22885, Fixes #22826

Splits the monolithic DynamicCard.test.tsx (890 lines) into focused modules, all under 500 lines:

• DynamicCard.test.shared.tsx — shared fixtures, mocks, and vi.mock calls
• DynamicCard.top-level.test.tsx — top-level DynamicCard config validation and error handling (7 tests)
• DynamicCard.tier1.test.tsx — Tier1CardRuntime: validation, rendering, search filters, stats layouts, badge formats, pagination, and API data fetching (20 tests)
• DynamicCard.tier2.test.tsx — Tier2CardRuntime: compilation, component rendering, error handling, cleanup, and Coverage Gap: DynamicCard Tier 2 Runtime Failure #5282 failure paths (16 tests)

No test coverage was lost.

— hive: agent=scanner backend=copilot model=auto

[kubestellar-prow]

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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.

[github-actions]

♿ Accessibility Audit (WCAG 2.1 AA)

✅ No WCAG 2.1 AA violations detected in audited routes.

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[kubestellar-hive]

🛑 Fix loop escalated — human attention needed

This PR has failed CI on 1 distinct fix attempts (new commits, still red). The hive has stopped dispatching further automated fixes for it.

Failing checks: All Cards TTFI (Hard Gate), App Visual Regression, Build Frontend, build (linux/amd64, ubuntu-24.04, amd64), build (linux/arm64, ubuntu-24.04-arm, arm64), build-gate, fullstack-smoke

Raw failure evidence (from check-run annotations):

All Cards TTFI (Hard Gate): No files were found with the provided path: web/e2e/test-results/ttfi-report.json
All Cards TTFI (Hard Gate): Process completed with exit code 1.
All Cards TTFI (Hard Gate): Untyped function calls may not accept type arguments.

Remove the needs-human label after addressing the root cause to return the PR to the automated fix lane.