try allowing DBusActivatable

lib/controllers/notification.dart

@@ -98,6 +98,10 @@ class NotificationController
                   name: "image-path",
                   value: LinuxHintStringValue(icon.path),
                 ),
+                .new(
+                  name: "desktop-entry",
+                  value: LinuxHintStringValue("nexus.federated.nexus"),
+                ),
               ],
       ),
       // TODO: See if icons can be added to iOS, macOS, and Windows notifications (#68)

lib/controllers/unified_push.dart

@@ -121,7 +121,7 @@ class UnifiedPushController extends AsyncNotifier<bool> {
 
   Future<void> register([bool alreadyRegistered = false]) async {
     final clientState = ref.watch(ClientStateController.provider);
-    if (clientState?.deviceId == null) ref.invalidateSelf();
+    if (clientState?.deviceId == null) return ref.invalidateSelf();
 
     final capabilities = await ref
         .watch(ClientController.provider.notifier)

linux/nexus.federated.nexus.desktop

@@ -6,5 +6,6 @@ Exec=nexus %u
 Icon=nexus
 Terminal=false
 Type=Application
+DBusActivatable=true
 Categories=Chat;Network;InstantMessaging;
 MimeType=x-scheme-handler/nexus.federated.nexus;

linux/nexus.federated.nexus.service

@@ -1,3 +0,0 @@
-[D-BUS Service]
-Name=nexus.federated.nexus
-Exec=/usr/bin/env nexus

linux/nix/pkg/default.nix

@@ -39,7 +39,7 @@ flutter.buildFlutterApplication {
   postInstall = ''
     install -D assets/bundled/icon.svg $out/share/icons/hicolor/scalable/apps/nexus.svg
     install -Dm755 linux/nexus.federated.nexus.desktop -t $out/share/applications
-    install -Dm644 linux/*.service -t $out/share/dbus-1/services
+    install -Dm644 linux/nexus.federated.nexus.UnifiedPush.service -t $out/share/dbus-1/services
     wrapProgram $out/bin/nexus \
       --suffix LD_LIBRARY_PATH : $out/app/nexus/lib
   '';