- Add bExpressiveMode toggle and editable ExpressiveModePromptFragment
with audio tag instructions ([laughs], [whispers], [sighs], [slow], [excited])
- BuildAgentPayload: append prompt fragment, set expressive_mode API field
on agent config, auto-override TTS model to eleven_v3_conversational
- OnFetchAgent: strip expressive fragment from prompt (exact + marker fallback),
read expressive_mode bool from API, auto-detect V3 model
- TTS model combo: inject asset's current model if absent from /v1/models list
(covers agent-only models like eleven_v3_conversational)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>