Design entry: hide the silence-cut streaming dictation path behind a per- workspace settings.ai.dictationStreaming flag, default false, with batch dictation as the default and fallback. Reuses the existing STT model and /ai-chat/transcribe — no new provider/model/endpoint fields. Lists the server + client touch points, acceptance criteria, and edge cases. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>