Fix Kiwix desktop issues

[benoit74]

Fix #122
Fix #123

Nota: approach to remove inline JS is definitely applicable to all scrapers using a Vue.JS (i.e. as a solution to openzim/overview#52). I'm waiting for some feedback but at some point we should probably move this code to a NPM package for easier reusability / maintenance.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.13%. Comparing base (bf104ce) to head (2530d2b).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #124   +/-   ##
=======================================
  Coverage   43.13%   43.13%           
=======================================
  Files           9        9           
  Lines         357      357           
  Branches       49       49           
=======================================
  Hits          154      154           
  Misses        199      199           
  Partials        4        4           

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[benoit74]

Screen.Recording.2025-07-17.at.16.52.59.mov