vikingowl
14e1a36622
Go's nil slice marshals as JSON null, not [], which crashed the Svelte
page's .length access on fresh installs where no discovery tick has
happened yet. Reproduced in production: /admin/discovery → 500 because
data.queue was null and {queue.length} dereferenced it.
Backend: initialize every returning slice in repository.go via
make([]T, 0) so zero rows serialize as [] consistently. Also applies to
PickStaleBuckets, ListSeriesByCity, and Stats.RecentErrors.
Web: coalesce data.queue / data.stats.recent_errors at the top of the
Svelte script with `?? []` so future nil-slice regressions don't take
the whole page down.