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

app/utils/logger.js

@@ -1,19 +1,19 @@
 /** Client-side logger: sends to server, falls back to console. */
-let sessionId = null
-let userId = null
+const sessionId = ref(null)
+const userId = ref(null)
 
 const CONSOLE_METHOD = Object.freeze({ error: 'error', warn: 'warn', info: 'log', debug: 'log' })
 
 export function initLogger(sessId, uid) {
-  sessionId = sessId
-  userId = uid
+  sessionId.value = sessId
+  userId.value = uid
 }
 
 function sendToServer(level, message, data) {
   setTimeout(() => {
     $fetch('/api/log', {
       method: 'POST',
-      body: { level, message, data, sessionId, userId, timestamp: new Date().toISOString() },
+      body: { level, message, data, sessionId: sessionId.value, userId: userId.value, timestamp: new Date().toISOString() },
       credentials: 'include',
     }).catch(() => { /* server down - don't spam console */ })
   }, 0)