fix: improve document URL handling

[targos]

• Avoid trailing slashes
• Always construct URLs with Axios API

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.60%. Comparing base (05dd98d) to head (e1f21af).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #63      +/-   ##
==========================================
- Coverage   81.81%   81.60%   -0.21%     
==========================================
  Files          12       12              
  Lines         264      261       -3     
  Branches       45       44       -1     
==========================================
- Hits          216      213       -3     
  Misses         47       47              
  Partials        1        1              

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