Follow up: remove leading space in storage_scrap_empty_guide string #395

Summary

Clean up the storage_scrap_empty_guide string resource by removing the leading space after the newline.

Current value:
아직 스크랩한 코스가 없어요\n 코스를 스크랩 해주세요

Expected value:
아직 스크랩한 코스가 없어요\n코스를 스크랩 해주세요

Why

During the StorageScrapFragment Compose migration in PR #392, this string was intentionally kept unchanged to preserve the scope of the 1:1 port. However, the existing leading space after \n causes the second line to render slightly indented in the centered empty state.

Affected area

• app/src/main/res/values/strings.xml
• storage_scrap_empty_guide

Acceptance criteria

• Remove the leading space after the newline in storage_scrap_empty_guide.
• Confirm the empty-state text renders centered consistently across both lines.
• Keep the change isolated from the Compose migration behavior.

Backlinks

• PR: StorageScrapFragment Compose 마이그레이션 및 ViewModel 테스트 추가 #392
• Review comment: StorageScrapFragment Compose 마이그레이션 및 ViewModel 테스트 추가 #392 (comment)

Requested by: @unam98