Improve session reconnect behavior

src/server/realtime/sessionEventHub.ts

@@ -2,6 +2,7 @@ import type { WebSocket } from "ws";
 
 export class SessionEventHub {
   private readonly socketsBySession = new Map<string, Set<WebSocket>>();
+  private readonly globalSockets = new Set<WebSocket>();
 
   add(sessionId: string, socket: WebSocket): void {
     let sockets = this.socketsBySession.get(sessionId);
@@ -13,10 +14,22 @@ export class SessionEventHub {
     socket.on("close", () => sockets?.delete(socket));
   }
 
+  addGlobal(socket: WebSocket): void {
+    this.globalSockets.add(socket);
+    socket.on("close", () => this.globalSockets.delete(socket));
+  }
+
   publish(sessionId: string, event: unknown): void {
     const payload = JSON.stringify(event);
     for (const socket of this.socketsBySession.get(sessionId) ?? []) {
       if (socket.readyState === socket.OPEN) socket.send(payload);
     }
   }
+
+  publishGlobal(event: unknown): void {
+    const payload = JSON.stringify(event);
+    for (const socket of this.globalSockets) {
+      if (socket.readyState === socket.OPEN) socket.send(payload);
+    }
+  }
 }