v0.169.0: disk-health card + degradation notification (Lemezek állapota)

Consumes the agent v0.94.0 smart payload (MinAgent floor unchanged; feature-detect
by presence). One pure verdict fn agentapi.DiskVerdictFor shared by the dashboard
card and the 6h check. Card via a 60s /disks TTL cache (anti-smartctl-storm);
unreachable agent -> Nincs adat, page never blocks. disk-health-check (6h) emits
disk_health_degraded on a degradation only vs an in-memory baseline (first run
silent, recovery/UNKNOWN never notify, multi-attr -> one event). No global banner
(deliberate). Pairs with the hub allowlist bump.

Tests: verdict table (>=90 red-proof), notifier emit, check first-run-silent
(red-proof), degradation-once, recovery-silent, UNKNOWN-excluded, FAILING-critical,
nil-smart card, TTL cache.

controller/internal/web/handlers.go

@@ -171,6 +171,10 @@ func (s *Server) dashboardHandler(w http.ResponseWriter, r *http.Request) {
 	data["SystemInfo"] = sysInfo
 	data["StorageBars"] = s.buildStorageBars()
 
+	// Disk-health card (v0.169.0) — physical-disk SMART verdicts via the 60s-TTL-cached /disks call.
+	// Never blocks the render: an unreachable agent yields nil rows and the card shows its empty state.
+	data["DiskHealthRows"] = s.diskHealthRows(r.Context())
+
 	// Backup status
 	data["BackupEnabled"] = s.cfg.Backup.Enabled
 	if s.backupMgr != nil {