- i18n dead-keys: delete 64 keys unreferenced in frontend/Go sources
(menu donate/docs, old index config actions, the whole removed
traditional-node/mTLS node form incl. its mtls subtree, xray
Outbounds/Balancers) from all 13 locales; 1536 -> 1472 keys each.
Verified repo-wide: only stale prebuilt binaries still embed them.
- probe TestMetricHistoryMinuteFold: replace wall-clock base with a
fixed 120 s-aligned instant; an odd-minute base split the 120 s fold
into two buckets (want 1, got 2) on ~half of all runs.