ファイル管理でuser_data配下が削除される不具合修正

[nanasess]

fixes #682
連続リロードは playwright でテストできないため、E2Eテストは作成できなさそう。
#682 にある手順で user_data 配下が削除されないことを確認

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.67%. Comparing base (a22be23) to head (f5d26bb).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1067   +/-   ##
=======================================
  Coverage   51.67%   51.67%           
=======================================
  Files          80       80           
  Lines       10224    10224           
=======================================
  Hits         5283     5283           
  Misses       4941     4941           

Flag	Coverage Δ
tests	51.67% <ø> (ø)

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