fix(layout): 여행 계획 헤더와 채팅 알림 배지 개선

[minbros]

변경 내용

• 여행 계획 헤더의 로고와 편집 버튼 크기를 조정했습니다.
• 채팅창을 닫아도 읽지 않은 메시지 수를 갱신하고, 0개면 배지를 숨깁니다.

변경 이유

• 제목과 날짜 사이의 과도한 공백을 줄이고, 새 메시지 알림이 누락되지 않도록 합니다.

테스트

• npm run lint
• npm test
• npm run build
• 그 외 수동 검증:

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Project	Deployment	Actions	Updated
frontend-server	Ready	Preview	Sep 11, 2026 4:48am UTC

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Configuration used: Organization UI

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📥 Commits

Reviewing files that changed from the base of the PR and between d4a81d4 and 1c3ce50.

📒 Files selected for processing (8)

• src/components/layout/HeaderBar.tsx
• src/components/layout/SidebarChatUnreadBadge.tsx
• src/components/layout/planning-chrome.test.tsx
• src/components/layout/travel-navigation.test.tsx
• src/hooks/useChatMessageRead.test.tsx
• src/hooks/useChatMessageRead.ts
• src/lib/stomp/subscribe-room-topics.test.ts
• src/lib/stomp/subscribe-room-topics.ts

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud