Fix typos in frontend code

[paskal]

Also, little style changes in frontend development documentation and add a missing comma in the privacy policy.

[codecov]

Codecov Report

Base: 62.35% // Head: 58.05% // Decreases project coverage by -4.29% ⚠️

Coverage data is based on head (00a2d15) compared to base (6ac7503).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1564      +/-   ##
==========================================
- Coverage   62.35%   58.05%   -4.30%     
==========================================
  Files         139      131       -8     
  Lines        3421     2911     -510     
  Branches      803      736      -67     
==========================================
- Hits         2133     1690     -443     
  Misses       1090     1090              
+ Partials      198      131      -67     

Impacted Files	Coverage Δ
frontend/apps/remark42/app/common/constants.ts	90.00% <ø> (ø)
frontend/apps/remark42/app/common/fetcher.ts	94.91% <ø> (ø)
...d/apps/remark42/app/components/comment/comment.tsx	62.38% <ø> (ø)
...d/apps/remark42/app/components/profile/profile.tsx	78.50% <ø> (ø)
frontend/apps/remark42/app/store/thread/utils.ts	68.75% <ø> (ø)
frontend/apps/remark42/app/utils/post-message.ts	50.00% <ø> (ø)
frontend/packages/api/lib/cookies.ts
frontend/packages/api/clients/admin.ts
frontend/packages/api/consts.ts
frontend/packages/api/index.ts
... and 4 more

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[github-actions]

size-limit report 📦

Path	Size
public/embed.mjs	2.03 KB (0%)
public/remark.mjs	72.76 KB (0%)
public/remark.css	8.12 KB (0%)
public/last-comments.mjs	35.67 KB (-0.01% 🔽)
public/last-comments.css	3.72 KB (-0.03% 🔽)
public/deleteme.mjs	12.05 KB (0%)
public/counter.mjs	749 B (0%)