Fix FragmentStateAdapter recreates Fragments

app/src/main/java/io/nekohasekai/sfa/ui/dashboard/GroupsFragment.kt

@@ -69,6 +69,7 @@ class GroupsFragment : Fragment(), CommandClient.Handler {
     override fun onDestroyView() {
         super.onDestroyView()
         binding = null
+        commandClient.disconnect()
     }
 
     private var displayed = false

app/src/main/java/io/nekohasekai/sfa/ui/main/DashboardFragment.kt

@@ -40,10 +40,11 @@ class DashboardFragment : Fragment(R.layout.fragment_dashboard) {
         return binding.root
     }
 
+    private val adapter by lazy { Adapter(this) }
     private fun onCreate() {
         val activity = activity ?: return
         val binding = binding ?: return
-        binding.dashboardPager.adapter = Adapter(this)
+        binding.dashboardPager.adapter = adapter
         binding.dashboardPager.offscreenPageLimit = Page.values().size
         activity.serviceStatus.observe(viewLifecycleOwner) {
             when (it) {
@@ -107,6 +108,7 @@ class DashboardFragment : Fragment(R.layout.fragment_dashboard) {
         super.onDestroyView()
         mediator?.detach()
         mediator = null
+        binding?.dashboardPager?.adapter = null
         binding = null
     }