feat: display per-VM/LXC guest IPs in table rows

- Fetch IPs from /status/guest API for running VMs/LXCs (requires guest agent)
- IPs displayed below the name column in the table
- Gracefully handles missing guest agent (quietly skips)
- Backlog: mark Per-VM IP Addresses as done

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backlog.md

@@ -27,6 +27,11 @@
 
 ## Quick Wins (low effort, high value)
 
+### Per-VM/LXC IP Addresses
+- Fetches guest IPs from `/status/guest` for running VMs/LXCs (requires guest agent).
+- Displays IPs below the name in the table.
+- **Status: done (merged to main)**
+
 ### Search / Filter
 - Client-side text input filtering table rows by name/node/status
 - Uses `useMemo` for performant filtering, auto-expands single node and filter-matched nodes