* refactor(frontend): extract NodeCard and OverviewTab from FleetView (F5-3+F5-5)
Folds F5-3 (NodeCard) and F5-5 (OverviewTab) into a single PR since
NodeCard was never previously extracted.
- Move FleetNodeStats, FleetNodeSystemStats, FleetNode into FleetView/types.ts
- Extract NodeCard (~200 LOC) including UsageBar, ContainerRow, StackSection
sub-components and getNodeCpu/getNodeMem/getNodeDisk/isCritical helpers
- Extract OverviewTab (~115 LOC); delegates to NodeCard, OverviewToolbar,
FleetTopology; receives all state as flat props from FleetView
- FleetView.tsx drops from ~1,107 to ~480 LOC (overview inline body gone)
- No logic moved; all state, hooks, and computed values remain in FleetView.tsx
- formatBytes consolidated to @/lib/utils; node helpers exported from NodeCard
- allNodes wrapped in useMemo to prevent unnecessary child re-renders
* fix(frontend): move node utility functions to nodeUtils.ts to fix react-refresh lint error
getNodeCpu, getNodeMem, getNodeDisk, and isCritical were exported from NodeCard.tsx
alongside a React component, violating the react-refresh/only-export-components rule.
Moving them to a dedicated nodeUtils.ts resolves the ESLint error without changing any logic.
Anso