🎨 Palette: 버튼에 tactile 피드백 추가

[seonghobae]

💡 What: .button 및 .language-switch button 엘리먼트에 :active 상태(CSS transform: scale())를 추가했습니다.
🎯 Why: 사용자가 버튼을 클릭할 때 물리적인 버튼처럼 살짝 눌리는 시각적 피드백(Tactile feedback)을 주어 인터랙션이 성공적으로 등록되었음을 명확히 인지할 수 있도록 돕습니다. (네트워크 요청 등 다음 액션이 일어나기 전 즉각적인 피드백)
📸 Before/After: 버튼 클릭 시 크기가 미세하게 줄어드는 시각 효과가 추가되었습니다.
♿ Accessibility: 클릭 피드백을 통해 인지적 사용성이 향상되었습니다.

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PR created automatically by Jules for task 7205880558090790587 started by @seonghobae

Summary by CodeRabbit

• 개선 사항

  • 버튼과 언어 전환 버튼에 클릭 시 즉각적인 시각적 피드백을 추가했습니다.
  • 버튼을 누르면 자연스럽게 축소되는 애니메이션이 적용됩니다.
  • 기존 투명도 전환 효과를 유지해 더욱 부드러운 상호작용을 제공합니다.

• 문서

  • 버튼 활성화 상태와 애니메이션 적용 원칙을 문서화했습니다.
  • 변경 사항을 변경 로그에 기록했습니다.

[google-labs-jules]

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[coderabbitai]

📝 Walkthrough

Walkthrough

언어 전환 버튼과 일반 버튼에 :active 상태와 transform: scale() 효과를 추가했습니다. 관련 디자인 지침과 변경 로그도 갱신했습니다.

Changes

버튼 활성 상태 피드백

Layer / File(s)	Summary
버튼 활성 상태 피드백 적용 styles.css, .Jules/palette.md, CHANGELOG.md	언어 전환 버튼과 일반 버튼에 transform 전환과 :active 축소 효과를 추가했습니다. 관련 지침과 변경 로그를 갱신했습니다.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• ContextualWisdomLab/ContextualWisdomLab.github.io#142: 같은 파일에 동일한 버튼 활성 상태와 크기 변환을 구현했습니다.
• ContextualWisdomLab/ContextualWisdomLab.github.io#149: 버튼 활성 상태 피드백 문서와 CSS 규칙이 중복됩니다.
• ContextualWisdomLab/ContextualWisdomLab.github.io#153: styles.css에 :active 상태와 transform: scale()을 추가한 변경과 겹칩니다.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	제목은 버튼에 tactile 피드백을 추가하는 주요 변경 사항을 정확하고 간결하게 설명합니다.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch palette-button-active-state-7205880558090790587

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.Jules/palette.md:
- Around line 25-27: Align the documented active-state transform in the “Add
tactile feedback to buttons” entry with the implementation in styles.css: either
make both .button and .language-switch button use scale(0.98), or explicitly
document the selector-specific scale(0.96) value for .language-switch button.

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 852544cf-9a1e-44a7-98e9-d2480f49ae21

📥 Commits

Reviewing files that changed from the base of the PR and between 7723bf2 and 3e951e8.

📒 Files selected for processing (3)

• .Jules/palette.md
• CHANGELOG.md
• styles.css

[coderabbitai]

📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

문서의 scale() 값과 구현을 일치시키세요.

.Jules/palette.md의 Line 27은 .button과 .language-switch button 모두 scale(0.98)을 사용한다고 설명합니다. 그러나 styles.css의 Line 115는 .language-switch button에 scale(0.96)을 적용합니다. 값을 통일하거나 선택자별 값을 문서에 명시하세요.

수정 예시

-**Action:** Always add an `:active` state with a slight `transform: scale(0.98)` to buttons to mimic real-world physical buttons and provide immediate interaction feedback.
+**Action:** Add an `:active` state to buttons. Use `transform: scale(0.98)` for `.button` and `transform: scale(0.96)` for `.language-switch button`.

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	## 2026-08-10 - Add tactile feedback to buttons
	**Learning:** Found that buttons (`.button`, `.language-switch button`) lacked an `:active` state. Without visual feedback upon clicking (tactile feedback), users might wonder if their interaction registered, especially before network or async operations complete.
	**Action:** Always add an `:active` state with a slight `transform: scale(0.98)` to buttons to mimic real-world physical buttons and provide immediate interaction feedback.
	## 2026-08-10 - Add tactile feedback to buttons
	**Learning:** Found that buttons (`.button`, `.language-switch button`) lacked an `:active` state. Without visual feedback upon clicking (tactile feedback), users might wonder if their interaction registered, especially before network or async operations complete.
	**Action:** Add an `:active` state to buttons. Use `transform: scale(0.98)` for `.button` and `transform: scale(0.96)` for `.language-switch button`.

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In @.Jules/palette.md around lines 25 - 27, Align the documented active-state
transform in the “Add tactile feedback to buttons” entry with the implementation
in styles.css: either make both .button and .language-switch button use
scale(0.98), or explicitly document the selector-specific scale(0.96) value for
.language-switch button.