make kestrel a tak server, so that it can send and receive pois as cots data

app/composables/useWebRTC.js

@@ -186,18 +186,18 @@ function waitForCondition(condition, timeoutMs = 3000, intervalMs = 100) {
 export function waitForConnectionState(transport, timeoutMs = 10000) {
   const terminal = ['connected', 'failed', 'disconnected', 'closed']
   return new Promise((resolve) => {
-    let tid
+    const tid = ref(null)
     const handler = () => {
       const state = transport.connectionState
       if (terminal.includes(state)) {
         transport.off('connectionstatechange', handler)
-        if (tid) clearTimeout(tid)
+        if (tid.value) clearTimeout(tid.value)
         resolve(state)
       }
     }
     transport.on('connectionstatechange', handler)
     handler()
-    tid = setTimeout(() => {
+    tid.value = setTimeout(() => {
       transport.off('connectionstatechange', handler)
       resolve(transport.connectionState)
     }, timeoutMs)