🎨 Palette: 빈 디렉토리 시각적/시맨틱 구분 추가

[seonghobae]

💡 What: 빈 디렉토리와 내용이 있는 디렉토리를 시각적 및 시맨틱하게 구분하는 기능을 추가했습니다.
🎯 Why: 사용자가 빈 디렉토리를 불필요하게 클릭하여 탐색하는 불편함을 줄이고 접근성을 향상시키기 위함입니다.
♿ Accessibility: aria-label과 title 속성에 "빈 디렉토리"를 추가하여 스크린 리더 사용자가 해당 디렉토리가 비어있음을 명확히 인지할 수 있도록 개선했습니다.

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PR created automatically by Jules for task 12578034918511239289 started by @seonghobae

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[Copilot]

Pull request overview

빈 디렉토리와 내용이 있는 디렉토리를 HTML 인덱스에서 시각적(아이콘) 및 시맨틱(aria-label/title)으로 구분해, 불필요한 탐색 클릭을 줄이고 접근성을 개선하는 변경입니다.

Changes:

• 디렉토리 엔트리에 대해 “빈 디렉토리” 여부를 확인하고 아이콘(📂/📁) 및 aria-label/title 텍스트를 분기 처리
• 빈 디렉토리 표시 동작을 검증하는 테스트 추가 및 기존 테스트가 새 동작과 충돌하지 않도록 보강
• Palette 학습 로그에 “빈 디렉토리 구분” 원칙 추가

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/main/kotlin/html4tree/main.kt	디렉토리 비어있음 여부 판정 후 아이콘/라벨을 “빈 디렉토리”로 구분 표시
src/test/kotlin/html4tree/MainTest.kt	빈 디렉토리 아이콘/라벨 검증 테스트 추가 및 기존 디렉토리 테스트 보강
src/test/kotlin/html4tree/AttrExceptionTest.kt	빈 디렉토리 판정 경로의 예외 발생 시에도 인덱스 생성이 지속됨을 검증
.jules/palette.md	“빈 디렉토리 구분”에 대한 학습/조치 항목 추가

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[seonghobae]

Closing this stale child-emptiness preflight branch. Although it injects the stream boundary for a failure test, the production design still enumerates each child directory a second time solely to decorate the parent listing, then silently treats filesystem errors as “not empty.” That adds hot-path I/O and a race-prone hint whose truth can change immediately after the probe. Keep the renderer snapshot-based; the current directory can communicate its own empty state cheaply in #385.

[google-labs-jules]

Closing this stale child-emptiness preflight branch. Although it injects the stream boundary for a failure test, the production design still enumerates each child directory a second time solely to decorate the parent listing, then silently treats filesystem errors as “not empty.” That adds hot-path I/O and a race-prone hint whose truth can change immediately after the probe. Keep the renderer snapshot-based; the current directory can communicate its own empty state cheaply in #385.

Understood. Acknowledging that this work is now obsolete and stopping work on this task.