🎨 Palette: [UX improvement] Fix accessible collapsible tables

[seonghobae]

💡 What: Modified UsecaseTable and ActorTable to toggle the visibility of the collapsible groups using a CSS hidden class instead of conditional React rendering (unmounting).

🎯 Why: When <tbody> elements are conditionally removed from the DOM, the id target for the toggle button's aria-controls attribute disappears. Screen readers require the controlled element to exist in the DOM to properly interpret the relationship.

📸 Before/After:

• Before: Collapsing a group unmounted the rows, breaking the aria-controls link.
• After: Collapsing a group simply applies display: none (hidden), keeping the semantic structure intact for assistive technologies.

♿ Accessibility: Fixes orphaned aria-controls attributes on collapsible table toggle buttons, improving the experience for screen reader users when interacting with grouped data. Added a critical learning entry to .jules/palette.md.

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PR created automatically by Jules for task 2147253668076563768 started by @seonghobae

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: fbdf09a5-7d8b-4ad2-9d90-500551e0662a

📥 Commits

Reviewing files that changed from the base of the PR and between cb2b2da and e0b747e.

📒 Files selected for processing (17)

• .jules/palette.md
• apps/app/app/components/ActorTable.tsx
• apps/app/app/components/UsecaseTable.tsx
• goals/43-dogfood-usecase-verify-returns-opaque-output-with-no-pass-.md
• goals/44-dogfood-usecase-show-human-format-omits-the-extensions-sec.md
• goals/48-dogfood-usecase-verify-produces-opaque-output-with-no-pass.md
• goals/52-dogfood-usecase-create-title-validator-title-not-verb-phra.md
• goals/54-dogfood-usecase-verify-produces-no-usable-output-so-the-ag.md
• goals/55-dogfood-usecase-verify-returns-opaque-output-with-no-pass-.md
• goals/65-dogfood-verify-flags-unlinked-steps-demands-implements-ref.md
• goals/67-dogfood-vspec-usecase-verify-produces-no-meaningful-output.md
• goals/70-dogfood-title-verb-phrase-validator-false-positives-on-leg.md
• goals/71-dogfood-vspec-actor-show-name-leaks-raw-apierror-api-reque.md
• goals/72-dogfood-scenario-add-does-not-surface-the-new-scenario-id-.md
• goals/73-dogfood-first-push-self-conflicts-on-local-markdown-the-ag.md
• goals/74-dogfood-vspec-usecase-verify-with-no-key-leaks-raw-apierro.md
• goals/75-dogfood-not-found-errors-emit-a-misleading-default-vspec-l.md

✨ Finishing Touches

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• Create PR with unit tests
• Commit unit tests in branch palette-fix-accessible-collapsible-tables-2147253668076563768

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch palette-fix-accessible-collapsible-tables-2147253668076563768

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[seonghobae]

통합 PR에서 유효 변경만 선별해 다시 다루고 있어 이 중복/잔여 PR은 정리합니다. #39 및 vibemafiaclub/vooster#34를 기준으로 후속 검토를 진행합니다.