S.M.A.R.T support (#614)

* add agent smart support

* refactor(system): update JSON tags in SmartData struct

* refactor(agent): use serial number as the key of SmartDataMap

Updated the SmartManager's methods to use the device's serial number as the key in the SmartDataMap instead of the device name.

* refactor: use raw values in smart attributes for nvme devices

* feat: add S.M.A.R.T. data display in web ui

Introduced a new Disks tab in the SystemDetail component to display disk information and S.M.A.R.T. data. The tab includes a table for visualizing disk attributes and their statuses.

Also added SmartData and SmartAttribute interfaces to support the new functionality.

beszel/internal/agent/agent.go

@@ -25,6 +25,7 @@ type Agent struct {
 	systemInfo    system.Info                // Host system info
 	gpuManager    *GPUManager                // Manages GPU data
 	cache         *SessionCache              // Cache for system stats based on primary session ID
+	smartManager     *SmartManager              // Manages SMART data
 }
 
 func NewAgent() *Agent {
@@ -62,6 +63,12 @@ func NewAgent() *Agent {
 		agent.gpuManager = gm
 	}
 
+	if sm, err := NewSmartManager(); err != nil {
+		slog.Debug("SMART", "err", err)
+	} else {
+		agent.smartManager = sm
+	}
+
 	// if debugging, print stats
 	if agent.debug {
 		slog.Debug("Stats", "data", agent.gatherStats(""))