Multi-node panels had no way to narrow the inbounds or clients lists to
a single node. Add a node filter to both pages:
- Inbounds: a toolbar select (All / Local / each node) that filters the
list client-side; shown only when the panel has nodes or node-attached
inbounds.
- Clients: a Nodes multi-select in the filter drawer. Node selections
are mapped onto inbound IDs client-side and fed through the existing
inbound CSV paging parameter, so the paging backend is untouched; an
impossible id (-1) is sent when no inbound matches so the filter
yields an honest empty result. InboundOption now carries nodeId to
make the mapping possible.
The local panel is selectable via a 0 sentinel (inbounds without a
nodeId). New i18n keys in all 13 locales.