Qwen3 narration is heard back

Demo narration in the Qwen3 voice is now checked sentence by sentence: Parakeet, the speech recognition Obeya already uses for voice input, transcribes each sentence, and one the voice stumbled over is spoken again. Words the voice said differently are listed for the agent making the demo, so a word the voice cannot read gets a respelling. Eleven existing demos narrated afresh triggered no unnecessary retakes.