fix(desktop): report default file opener errors - #47891

The following comment was made by an LLM, it may be inaccurate:

Found a related PR:

#47724: fix(desktop): surface default path opening errors

This appears to be addressing the same issue (#47722) as the current PR (#47891). Both are fixing error reporting for default file opener functionality in the desktop app. You may want to check if #47724 is still open and whether the current PR duplicates or builds on that work.

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