controller v0.49.0: slice 10 P2 activation — pending-drive detection + restart button

pendingActivationDrives() flags registered drives the agent shows attached but not
live-mounted in the container; settings banner + "Újraindítás most" button →
/api/storage/activate → agentapi.GuestReboot. Batches all pending into one restart.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

controller/internal/web/handlers.go

@@ -803,6 +803,9 @@ func (s *Server) settingsData() map[string]interface{} {
 		storageViews = append(storageViews, view)
 	}
 	data["StoragePaths"] = storageViews
+	// Drives enrolled but not yet activated in the guest (slice 10 P2): they need the user-triggered
+	// "Újraindítás most" to take effect (the host-side live inject is blocked on an unprivileged guest).
+	data["PendingDrives"] = s.pendingActivationDrives()
 
 	// Recovery info for emergency section
 	data["RetrievalPassword"] = s.settings.GetRetrievalPassword()