Record each panel's own Xray IP observations under its panelGuid and merge each node's guid-keyed report on the master, so the panel can tell which node a client IP is connecting through (the flat inbound_client_ips union is pushed back to every node and cannot attribute). Adds the NodeClientIp model + migration, the clientIpsByGuid endpoint and node-sync merge, node-name labels in the client IP log, and cleanup on node deletion.
Bring back the v2.9.x traffic column UX: used amount, color-coded progress bar, limit/infinity label, and hover popover with upload/download/remaining breakdown. Adds a shared ClientTrafficCell component, traffic display helpers, and unit tests.