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/ws/handlers.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/fxamacker/cbor/v2"
 	"github.com/henrygd/beszel/internal/common"
+	"github.com/henrygd/beszel/internal/entities/smart"
 	"github.com/henrygd/beszel/internal/entities/system"
 	"github.com/henrygd/beszel/internal/entities/systemd"
 	"github.com/lxzan/gws"
@@ -155,7 +156,7 @@ func (h *systemdInfoHandler) Handle(agentResponse common.AgentResponse) error {
 ////////////////////////////////////////////////////////////////////////////
 
 // RequestSmartData requests SMART data via WebSocket.
-func (ws *WsConn) RequestSmartData(ctx context.Context) (map[string]any, error) {
+func (ws *WsConn) RequestSmartData(ctx context.Context) (map[string]smart.SmartData, error) {
 	if !ws.IsConnected() {
 		return nil, gws.ErrConnClosed
 	}
@@ -163,7 +164,7 @@ func (ws *WsConn) RequestSmartData(ctx context.Context) (map[string]any, error)
 	if err != nil {
 		return nil, err
 	}
-	var result map[string]any
+	var result map[string]smart.SmartData
 	handler := ResponseHandler(&smartDataHandler{result: &result})
 	if err := ws.handleAgentRequest(req, handler); err != nil {
 		return nil, err
@@ -174,19 +175,14 @@ func (ws *WsConn) RequestSmartData(ctx context.Context) (map[string]any, error)
 // smartDataHandler parses SMART data map from AgentResponse
 type smartDataHandler struct {
 	BaseHandler
-	result *map[string]any
+	result *map[string]smart.SmartData
 }
 
 func (h *smartDataHandler) Handle(agentResponse common.AgentResponse) error {
 	if agentResponse.SmartData == nil {
 		return errors.New("no SMART data in response")
 	}
-	// convert to map[string]any for transport convenience in hub layer
-	out := make(map[string]any, len(agentResponse.SmartData))
-	for k, v := range agentResponse.SmartData {
-		out[k] = v
-	}
-	*h.result = out
+	*h.result = agentResponse.SmartData
 	return nil
 }