With this change, Rover assumes that all pathnames are encoded according to the user's locale. This requires linking to a curses library that supports wide character functions such as get_wch().

This change removes any code that is not asynchronous-safe from signal handlers, leaving those operations to be performed in the main flow of the program. The same strategy cannot be used for SIGSEGV since its handler is not allowed to return normally. In this case, the old handler was simply removed. The reset command may be used to restore the terminal state if Rover ever crashes.

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