Show ZFS pool layout, scrub status and device health in Storage view

/api/storage now runs a single `zpool status -j --json-int -P` (OpenZFS
2.3+) for all pools and returns, per pool:
- top-level vdevs with type, raidz/draid parity, class (data, special,
  dedup, log, cache, spare), state and read/write/checksum errors
- member devices with path, resolved base disk, state, error counters,
  slow I/Os, and the spare-N/replacing-N they sit under while swapping
- scrub/resilver status (progress only while running), the pool's
  status/action text and data-error count
- fragmentation, capacity and dedup ratio from `zpool list`

This replaces the per-pool `zpool status` text loop whose result
(zfs_disks) was never used. Member paths (by-id, by-partlabel, wwn) are
resolved to base disks via sysfs rather than an lsblk call per device.
On ZFS without `-j`, pools report details_available: false and the UI
falls back to the existing basic card.

The ZFS pool card shows a layout summary (e.g. "RAIDZ2 | 5 disks |
Scrub finished ...") and opens a details dialog with the vdev tree,
per-device error counts, scrub/resilver progress, and links from each
member disk to its disk details dialog.

Tested against `zpool status -j` output from PVE 9 / OpenZFS 2.4.4:
mirror, raidz2, striped mirrors, single-disk pool, and a file-backed
degraded raidz1 with log, cache and spare devices.

Tests cover the `zpool status -j` -> Storage view shape against real
output from PVE 9 / OpenZFS 2.4.4 hosts (serials and WWNs replaced):
mirror, raidz2, single-disk pool, slow I/Os, and a degraded raidz1 with
log, cache and spare devices; plus a synthetic resilver with a spare
swapping in. Member path -> base disk resolution is tested against a
stubbed sysfs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

AppImage/messages/en/common.json

@@ -309,6 +309,56 @@
     "externalStorageUsb": "External Storage (USB)",
     "physicalDisksSmart": "Physical Disks & SMART Status",
     "zfsPools": "ZFS Pools",
+    "zfs": {
+      "poolDetails": "Pool layout, scrub status and device health",
+      "detailsUnavailable": "Detailed pool layout requires OpenZFS 2.3 or newer.",
+      "status": "Status",
+      "action": "Action",
+      "capacity": "Capacity",
+      "fragmentation": "Fragmentation",
+      "dedupRatio": "Dedup Ratio",
+      "layout": "Layout",
+      "singleDisk": "Single disk",
+      "stripe": "Stripe",
+      "mirror": "Mirror",
+      "raidz": "RAIDZ{parity}",
+      "draid": "dRAID{parity}",
+      "diskCountOne": "{count} disk",
+      "diskCountMany": "{count} disks",
+      "errorsReported": "Errors reported",
+      "scanTitle": "Scrub / Resilver",
+      "scrub": "Scrub",
+      "resilver": "Resilver",
+      "neverScrubbed": "Never scrubbed",
+      "scanRunning": "{kind} in progress ({percent}%)",
+      "scanCanceled": "{kind} canceled",
+      "scanFinished": "{kind} finished {date}",
+      "started": "Started",
+      "ended": "Finished",
+      "repaired": "Repaired",
+      "scanErrors": "Scan Errors",
+      "dataErrors": "{count} data errors",
+      "noDataErrors": "No known data errors",
+      "device": "Device",
+      "disk": "Disk",
+      "state": "State",
+      "readErrors": "Read errors",
+      "writeErrors": "Write errors",
+      "checksumErrors": "Checksum errors",
+      "readShort": "R",
+      "writeShort": "W",
+      "checksumShort": "CK",
+      "slowIos": "Slow I/Os",
+      "via": "via {name}",
+      "classes": {
+        "normal": "Data",
+        "special": "Special",
+        "dedup": "Dedup",
+        "log": "Log",
+        "cache": "Cache",
+        "spare": "Spare"
+      }
+    },
     "local": "Local",
     "remote": "Remote",
     "free": "Free",