feat: add socket.io events for narration broadcast

Wire narration events through the socket layer so clients receive
real-time narration updates. Server emits narration-event on creation,
narration-update when LLM text arrives, and narration-history on connect.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/network/SocketServer.ts

@@ -26,6 +26,16 @@ export class SocketServer {
       const update = serializeStateUpdate(this.gameLoop.world, this.gameLoop.getTick(), this.gameLoop.getGameTime());
       this.io.emit('state-update', update);
     });
+
+    const narrationService = this.gameLoop.narrationService;
+
+    narrationService.onEventCreated = (event) => {
+      this.io.emit('narration-event', event);
+    };
+
+    narrationService.onEventUpdated = (event) => {
+      this.io.emit('narration-update', { id: event.id, narration: event.narration });
+    };
   }
 
   private setupConnections(): void {
@@ -51,6 +61,9 @@ export class SocketServer {
       socket.emit('world-state', serializeWorldState(world, map));
       socket.emit('player-joined', { playerId, entityId: entity });
 
+      // Send narration history
+      socket.emit('narration-history', this.gameLoop.narrationService.getRecentEvents());
+
       // Notify others
       socket.broadcast.emit('player-joined', { playerId, entityId: entity });