The DJI SDK can drop a registration attempt without ever calling
onRegister (it logged "Exception when executing encrypt/decrypt
functions" and nothing more), which left the app on "Registering…" with
no way out but a restart. The bridge now gives up after 60 s and reports
a failure that names the likely causes; a late answer from the SDK still
replaces it.
The failure was also only visible in the settings sheet, which the home
screen's Connect aircraft flow never opens, so failures now show a
snackbar too.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
