add hub get logic and part of client

client/src/api/ws.js

@@ -0,0 +1,26 @@
+let socket = null
+const handlers = {}
+
+export function wsOnEvent(type, fn) {
+  handlers[type] = fn
+}
+
+export function wsConnect() {
+  if (socket) return
+  const token = localStorage.getItem('token') || ''
+  socket = new WebSocket('ws://localhost:8080/ws')
+  socket.onopen = () => socket.send(JSON.stringify({ token }))
+  socket.onmessage = (e) => {
+    try {
+      const msg = JSON.parse(e.data)
+      handlers[msg.type]?.(msg.event)
+    } catch (err) { console.error('[ws] message error', err) }
+  }
+  socket.onclose = () => { socket = null }
+  socket.onerror = (err) => console.error('[ws] error', err)
+}
+
+export function wsDisconnect() {
+  socket?.close()
+  socket = null
+}