fix: open files on linux

[AyaseFile]

No description provided.

[monkeyWie]

Thanks, have you tested it??

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.12%. Comparing base (5ad15cc) to head (7a6cbcc).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #765      +/-   ##
==========================================
- Coverage   61.18%   61.12%   -0.06%     
==========================================
  Files          35       35              
  Lines        3694     3694              
==========================================
- Hits         2260     2258       -2     
- Misses       1161     1163       +2     
  Partials      273      273              

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[AyaseFile]

Tested on GNOME and KDE. If xdg-open fails, support for more file managers may be needed.
I tried showing error messages, but I didn't mean to change too much.