Wrap main in runZonedGuarded and install FlutterError.onError /
PlatformDispatcher.onError so background async failures get logged
instead of dying silently. Guard PrefUtil.init so a SharedPreferences
platform error no longer aborts startup. Recognize TypeError and
FormatException in dioErrorToUserMessage to give a clearer message
when the backend returns an unexpected JSON shape or bad timestamp.
Wrap Settings._save in try/catch so prefs write failures show a
snackbar instead of leaving the Save button silently dead.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
PrefUtil.setValue now returns the underlying SharedPreferences result
and throws on unsupported types; settings save reports failures rather
than always showing success. Device detail and event history report
the real Dio error message and skip cancellations.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds a dropdown in the settings page to switch between available themes
(Catppuccin Mocha, Gruvbox Dark). The selected theme is applied immediately
on save and persisted across restarts via SharedPreferences.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
