fix race condition

src/server/api/apps.ts

@@ -24,13 +24,14 @@ function convert(app: BackendApp): SharedApp {
 // SSE: full app state snapshots for the dashboard UI (every state change)
 // For discrete lifecycle events consumed by app processes, see /api/events/stream
 router.sse('/stream', (send) => {
+  let queue = Promise.resolve()
   const broadcast = () => {
     const apps: SharedApp[] = allApps().map(({
       name, state, icon, error, port, started, logs, tool, tunnelEnabled, tunnelUrl
     }) => ({
       name, state, icon, error, port, started, logs, tool, tunnelEnabled, tunnelUrl,
     }))
-    send(apps)
+    queue = queue.then(() => send(apps))
   }
 
   broadcast()

src/server/api/events.ts

@@ -7,8 +7,12 @@ const router = Hype.router()
 // Unlike /api/apps/stream (full state snapshots for the dashboard), this sends
 // individual events so apps can react to specific lifecycle changes.
 router.sse('/stream', (send) => {
-  const unsub = onEvent(event => send(event))
+  let queue = Promise.resolve()
-  const heartbeat = setInterval(() => send('', 'ping'), 60_000)
+  const safeSend = (...args: Parameters<typeof send>) => {
+    queue = queue.then(() => send(...args))
+  }
+  const unsub = onEvent(event => safeSend(event))
+  const heartbeat = setInterval(() => safeSend('', 'ping'), 60_000)
   return () => {
     clearInterval(heartbeat)
     unsub()