fix: qa 및 uxqa에서 나온 이슈 사항을 수정하라

[saseungmin]

• 읽지 않은 알람 리스트 배경 색상 변경
• 글 리스트 최신순 정렬 (작성일시 기준)
• 토스트 메시지 PC에서는 가운데에 위치하도록 수정하고 위에서 아래로 나오도록 통일
• 모바일일 때 토스트 메시지 CSS 수정
• 모바일일 때 시작하기(sign up) 페이지, 홈 리스트 페이지는 좌우 margin 20px 나머지는 16px
• 모달 background opacity 0.4로 변경, 토스트 메시지 background opacity 0.95로 변경

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Name	Status	Preview	Updated
soople	✅ Ready (Inspect)	Visit Preview	Sep 8, 2022 at 2:02PM (UTC)

[github-actions]

Bundle Sizes

Compared against 0990ce6

Route: No significant changes found

Dynamic import: No significant changes found

[codecov]

Codecov Report

Merging #464 (ea5f353) into main (0990ce6) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main      #464   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          186       186           
  Lines         3328      3328           
  Branches       341       341           
=========================================
  Hits          3328      3328           

Impacted Files	Coverage Δ
src/components/alarm/AlarmItem.tsx	100.00% <ø> (ø)
src/components/auth/SignInModal.tsx	100.00% <ø> (ø)
src/components/common/ConfirmModal.tsx	100.00% <ø> (ø)
src/components/common/Core.tsx	100.00% <ø> (ø)
src/components/common/FormModal.tsx	100.00% <ø> (ø)
src/components/common/ViewModalWindow.tsx	100.00% <ø> (ø)
src/containers/auth/SignUpContainer.tsx	100.00% <ø> (ø)
src/pages/index.page.tsx	100.00% <ø> (ø)
src/services/firebase/getQuery.ts	100.00% <ø> (ø)
src/styles/Layout.tsx	100.00% <ø> (ø)

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[github-actions]

⚡️ 1 Lighthouse report!

Category	Score
🔴 Performance	40
🟢 Accessibility	90
🟢 Best Practices	92
🟢 SEO	100
🟠 PWA	80

Category	Score
🟢 First Contentful Paint	1.6 s
🔴 Time to Interactive	10.8 s
🟢 Speed Index	2.7 s
🔴 Total Blocking Time	1,580 ms
🔴 Largest Contentful Paint	9.1 s
🟢 Cumulative Layout Shift	0

⚡️ 2 Lighthouse report!

Category	Score
🔴 Performance	46
🟢 Accessibility	90
🟢 Best Practices	92
🟢 SEO	100
🟠 PWA	80

Category	Score
🟢 First Contentful Paint	1.6 s
🔴 Time to Interactive	9.8 s
🟢 Speed Index	1.6 s
🔴 Total Blocking Time	1,010 ms
🔴 Largest Contentful Paint	7.6 s
🟢 Cumulative Layout Shift	0

⚡️ 3 Lighthouse report!

Category	Score
🔴 Performance	44
🟢 Accessibility	90
🟢 Best Practices	92
🟢 SEO	100
🟠 PWA	80

Category	Score
🟢 First Contentful Paint	1.6 s
🔴 Time to Interactive	9.8 s
🟢 Speed Index	2.3 s
🔴 Total Blocking Time	1,280 ms
🔴 Largest Contentful Paint	7.5 s
🟢 Cumulative Layout Shift	0