Add demo trio personas and polish empty-state panel UX.

perf(orchestrator): prefetch human-phase opinions and tighten context budget

feat(ui): header cleanup + Table View shortcut + post-chat downloads strip

feat: human participant turns + credential intake redesign

Tighten CCAI conversation flow and visual threading

Build CCAI Vibe Demo on top of LLMChats3 baseline

Import LLMChats3 master as CCAI baseline