Method isStreaming

ui/src/protocol/message-processor.ts:145–147

* Check if a surface is in streaming mode

(surfaceId: string)

   * Check if a surface is in streaming mode
   */
  isStreaming(surfaceId: string): boolean {
    return this.streamingStates.get(surfaceId)?.isStreaming ?? false;
  }

  /**
   * Clear all surfaces