BusyBox opkg exits 0 even when 'Cannot install' due to insufficient space,
causing the fallback to silently report success. Now captures stderr and
checks for the failure string explicitly.
Adds user-visible error for the common case where the router flash is too
small for the TollGate package (~19 MB needed vs ~9 MB available on typical
budget routers). Adds error prefixes to the RPC sanitizer allowlist so the
message reaches the UI instead of showing 'Check server logs'.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
ssmithx
4c56e1bb96