feat: add ZFS monitoring (#2209)

- track pool capacity, health, I/O, scrub status, and vdev errors
- report dataset usage and correct ZFS filesystem metrics
- add pool charts, detail views, refresh controls, and health alerts
- persist pool details and include ZFS usage in disk alerts
- support configurable detail intervals and legacy agent compatibility

---------

Co-authored-by: hank <hank@henrygd.me>

internal/site/src/components/routes/system.tsx

@@ -8,10 +8,11 @@ import { useSystemData } from "./system/use-system-data"
 import { CpuChart, ContainerCpuChart } from "./system/charts/cpu-charts"
 import { MemoryChart, ContainerMemoryChart, SwapChart } from "./system/charts/memory-charts"
 import { RootDiskCharts, ExtraFsCharts } from "./system/charts/disk-charts"
+import { ZfsCharts } from "./system/charts/zfs-charts"
 import { BandwidthChart, ContainerNetworkChart } from "./system/charts/network-charts"
 import { TemperatureChart, FanChart, BatteryChart } from "./system/charts/sensor-charts"
 import { GpuPowerChart, GpuDetailCharts } from "./system/charts/gpu-charts"
-import { LazyContainersTable, LazySmartTable, LazySystemdTable } from "./system/lazy-tables"
+import { LazyContainersTable, LazySmartTable, LazySystemdTable, LazyZfsTable } from "./system/lazy-tables"
 import { LoadAverageChart } from "./system/charts/load-average-chart"
 import { ContainerIcon, CpuIcon, HardDriveIcon, TerminalSquareIcon } from "lucide-react"
 import { GpuIcon } from "../ui/icons"
@@ -63,6 +64,7 @@ export default memo(function SystemDetail({ id }: { id: string }) {
 	const hasContainersTable = hasContainers && compareSemVer(chartData.agentVersion, SEMVER_0_14_0) >= 0
 	const hasSystemd = system.info.sv
 	const hasGpu = hasGpuData || hasGpuPowerData
+	const hasZfs = Object.keys(systemStats.at(-1)?.stats?.z ?? {}).length > 0
 
 	// keep tabsRef in sync for keyboard navigation
 	const tabs = ["core", "disk"]
@@ -142,6 +144,10 @@ export default memo(function SystemDetail({ id }: { id: string }) {
 
 				<ExtraFsCharts systemData={systemData} />
 
+				{hasZfs && <ZfsCharts systemData={systemData} />}
+
+				{hasZfs && <LazyZfsTable systemId={system.id} />}
+
 				{maybeHasSmartData && <LazySmartTable systemId={system.id} />}
 
 				{hasContainersTable && <LazyContainersTable systemId={system.id} />}
@@ -204,6 +210,8 @@ export default memo(function SystemDetail({ id }: { id: string }) {
 								<RootDiskCharts systemData={systemData} />
 							</div>
 							<ExtraFsCharts systemData={systemData} />
+							{hasZfs && <ZfsCharts systemData={systemData} />}
+							{hasZfs && <LazyZfsTable systemId={system.id} />}
 							{maybeHasSmartData && <LazySmartTable systemId={system.id} />}
 						</>
 					)}