fix(frontend): Show translate button only if translator is available

[caipira113]

What

The button is displayed only when translation is available on the server.

Why

There was an issue where the button appeared even though translatorAvailable was false.

Additional info (optional)

Checklist

• Read the contribution guide
• Test working in a local environment
• (If needed) Add story of storybook
• (If needed) Update CHANGELOG.md
• (If possible) Add tests

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.15 ⚠️

Comparison is base (a2f2f02) 78.47% compared to head (11b9a52) 78.33%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #76      +/-   ##
===========================================
- Coverage    78.47%   78.33%   -0.15%     
===========================================
  Files          182      180       -2     
  Lines        23150    22993     -157     
  Branches       509      509              
===========================================
- Hits         18168    18011     -157     
  Misses        4982     4982              

Impacted Files	Coverage Δ
packages/frontend/src/components/MkNote.vue	100.00% <100.00%> (ø)
...kages/frontend/src/components/MkSubNoteContent.vue	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

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[noridev]

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