Phase 3: Voice-to-Voice S2S pipeline — F5-TTS, LLM brain, CER metric

Add multi-user speaker profiles, collective voice, and mode toggle

Add confidence loop, curiosity engine, and lightweight TTS

Fix Bambara TTS red state + surface detailed errors in UI

Fix: install maliba-ai lazily at runtime, not at build time

Phase 2: Waxal TTS — Bambara voice output + Fula training notebook

Initial commit: Sahel-Agri Voice AI