Improve animation generator CTR copy

[rrih]

Summary

• Updates the CSS Animation Generator tool description used for metadata and tool cards
• Rewrites the above-the-fold intro copy around keyframes, hover effects, fade-ins, and loading loops
• Keeps the exact title phrase "CSS Animation Generator" and does not change ad density or calculator logic

Selected action

• Type: ctr-rewrite
• Query: css animation generator
• Accelerator rationale: 65 impressions, 0% CTR, average position 27.4
• Automation mode: draft-pr, so this PR is intentionally not auto-merged

Expected KPI impact

• Improve search-result relevance and snippet alignment for the existing animation generator page
• Support CTR lift without adding thin content or changing production ad placement

Verification

• bash /Users/rrih/.codex/skills/rrih-github-io-revenue-accelerator/scripts/github_preflight.sh rrih/rrih.github.io
• bun test
• bun --bun tsc --noEmit (first failed on stale .next take-home generated types; passed after rm -rf .next out)
• bun run lint (passes with existing 9 warnings)
• bun run build
• bun run dev-check (passes through dev server Ready)
• curl http://localhost:3333/tools/animation-generator/ confirms updated meta and hero copy

Refs #15

[rrih]

Revenue accelerator repair update (2026-06-20 JST)

• Refreshed this draft PR with latest origin/main and resolved the growth metrics conflict.
• Pushed 9c78bfe to codex/animation-generator-ctr-copy.
• GitHub now reports mergeStateStatus: CLEAN.
• CI test is successful: https://github.com/rrih/rrih.github.io/actions/runs/27864211779/job/82465396878

Local verification:

• bun test -> 27 pass / 0 fail
• bun --bun tsc --noEmit -> pass
• bun run lint -> pass with existing 9 warnings
• bun run build -> pass
• bun run dev-check -> pass through dev server Ready

This remains a draft PR and was not merged.

[rrih]

Follow-up cleanup (2026-06-20 JST)

• Added 01d4c20 to remove old metrics/sitemap/service-worker generated diffs from this PR.
• Final PR diff is now limited to:
  • src/app/tools/animation-generator/page.tsx
  • src/config/tools.tsx
• GitHub reports mergeStateStatus: CLEAN.
• CI test is successful: https://github.com/rrih/rrih.github.io/actions/runs/27864370490/job/82465822569