add dedicated S.M.A.R.T. page with persistent device storage

- Add /smart route to view SMART data across all systems
- Store SMART devices in new smart_devices collection
- Auto-fetch SMART data when system first comes online
- Add refresh/delete actions per device with realtime updates
- Add navbar and command palette entries

internal/hub/hub.go

@@ -268,8 +268,8 @@ func (h *Hub) registerApiRoutes(se *core.ServeEvent) error {
 	// update / delete user alerts
 	apiAuth.POST("/user-alerts", alerts.UpsertUserAlerts)
 	apiAuth.DELETE("/user-alerts", alerts.DeleteUserAlerts)
-	// get SMART data
-	apiAuth.GET("/smart", h.getSmartData)
+	// refresh SMART devices for a system
+	apiAuth.POST("/smart/refresh", h.refreshSmartData)
 	// get systemd service details
 	apiAuth.GET("/systemd/info", h.getSystemdInfo)
 	// /containers routes
@@ -365,22 +365,25 @@ func (h *Hub) getSystemdInfo(e *core.RequestEvent) error {
 	return e.JSON(http.StatusOK, map[string]any{"details": details})
 }
 
-// getSmartData handles GET /api/beszel/smart requests
-func (h *Hub) getSmartData(e *core.RequestEvent) error {
+// refreshSmartData handles POST /api/beszel/smart/refresh requests
+// Fetches fresh SMART data from the agent and updates the collection
+func (h *Hub) refreshSmartData(e *core.RequestEvent) error {
 	systemID := e.Request.URL.Query().Get("system")
 	if systemID == "" {
 		return e.JSON(http.StatusBadRequest, map[string]string{"error": "system parameter is required"})
 	}
+
 	system, err := h.sm.GetSystem(systemID)
 	if err != nil {
 		return e.JSON(http.StatusNotFound, map[string]string{"error": "system not found"})
 	}
-	data, err := system.FetchSmartDataFromAgent()
-	if err != nil {
-		return e.JSON(http.StatusNotFound, map[string]string{"error": err.Error()})
+
+	// Fetch and save SMART devices
+	if err := system.FetchAndSaveSmartDevices(); err != nil {
+		return e.JSON(http.StatusInternalServerError, map[string]string{"error": err.Error()})
 	}
-	e.Response.Header().Set("Cache-Control", "public, max-age=60")
-	return e.JSON(http.StatusOK, data)
+
+	return e.JSON(http.StatusOK, map[string]string{"status": "ok"})
 }
 
 // generates key pair if it doesn't exist and returns signer