Summary

• Replace flat expandable networklist with a rich networkview component following the secgroupview pattern
• 4-pane layout: network selector, info panel, subnets table (with allocation pools), and ports table
• Ports resolve server and router names via compute/network API for clear device identification
• External network detection via separate API call, displayed in info pane
• Context-sensitive action bar (create/delete network vs subnet based on focused pane)
• Responsive wide/narrow layouts with Tab/Shift+Tab pane cycling

Test plan

• Navigate to Networks tab, verify selector shows all networks with subnet counts and status
• Tab/Shift+Tab cycles through Selector, Info, Subnets, Ports panes
• Select different networks, verify subnets and ports update
• Ports show resolved server/router names (not just IDs)
• Selected subnet shows allocation pool ranges inline
• Ctrl+N on selector/info pane creates network; on subnets pane creates subnet
• Ctrl+D on selector/info pane deletes network; on subnets pane deletes subnet
• Cross-resource navigation (jump to networks from server detail) positions cursor correctly
• Narrow terminal (< 80 cols) renders stacked vertical layout
• Auto-refresh and manual R refresh work