feat(desktop): report current user online clients

apps/desktop-client/src/main/runtime-snapshot.ts

@@ -144,6 +144,10 @@ function createLiveRuntimeSnapshot(controller: RuntimeControllerSnapshot) {
       channel: controller.client?.channel ?? 'dev',
     },
   ] as const
+  const onlineClientCount =
+    typeof controller.onlineClientCount === 'number'
+      ? Math.max(0, controller.onlineClientCount)
+      : clients.filter((item) => item.status === 'online').length
 
   const accounts = controller.accounts.map((account) =>
     createRuntimeAccountView(controller, account, {
@@ -185,7 +189,7 @@ function createLiveRuntimeSnapshot(controller: RuntimeControllerSnapshot) {
       lastFullSyncAt: controller.lastAccountsSyncAt || now,
     },
     summary: {
-      onlineClients: clients.filter((item) => item.status === 'online').length,
+      onlineClients: onlineClientCount,
       accountsBound: accounts.length,
       queuedTasks: tasks.filter((item) => item.status === 'queued').length,
       issuesOpen: