feat(pitch-deck): add AI Presenter mode with LiteLLM migration and FAQ system

- Migrate chat API from Ollama to LiteLLM (OpenAI-compatible SSE)
- Add 15-min presenter storyline with bilingual scripts for all 20 slides
- Add FAQ system (30 entries) with keyword matching for instant answers
- Add IntroPresenterSlide with avatar placeholder and start button
- Add PresenterOverlay (progress bar, subtitle text, play/pause/stop)
- Add AvatarPlaceholder with pulse animation during speaking
- Add usePresenterMode hook (state machine: idle→presenting→paused→answering→resuming)
- Add 'P' keyboard shortcut to toggle presenter mode
- Support [GOTO:slide-id] markers in chat responses
- Dynamic slide count (was hardcoded 13, now from SLIDE_ORDER)
- TTS stub prepared for future Piper integration

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -833,8 +833,9 @@ services:
     environment:
       NODE_ENV: production
       DATABASE_URL: postgres://${POSTGRES_USER:-breakpilot}:${POSTGRES_PASSWORD:-breakpilot123}@postgres:5432/${POSTGRES_DB:-breakpilot_db}
-      OLLAMA_URL: ${OLLAMA_URL:-http://host.docker.internal:11434}
-      OLLAMA_MODEL: ${OLLAMA_MODEL:-qwen3.5:35b-a3b}
+      LITELLM_URL: ${LITELLM_URL:-https://llm-dev.meghsakha.com}
+      LITELLM_MODEL: ${LITELLM_MODEL:-gpt-oss-120b}
+      LITELLM_API_KEY: ${LITELLM_API_KEY:-sk-0nAyxaMVbIqmz_ntnndzag}
     extra_hosts:
       - "host.docker.internal:host-gateway"
     depends_on: