[frontend] fix content export pdf (#8976)

[marieflorescontact]

Proposed changes

• Add check on currentFileId

Related issues

• PDF export of HTML content is broken #8976

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.29%. Comparing base (864bcea) to head (a7f2fe7).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8979      +/-   ##
==========================================
- Coverage   66.29%   66.29%   -0.01%     
==========================================
  Files         597      597              
  Lines       61089    61089              
  Branches     6287     6288       +1     
==========================================
- Hits        40501    40499       -2     
- Misses      20588    20590       +2     

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