Fix Arabic brand spelling by normalizing incorrect variants in AI replies and strengthen system prompt guidance

feat: replace Gemini with OpenRouter as fallback AI provider

feat: rebrand FALSA to FALZH with updated supabase schema, tool names, and prompts

feat: replace Hugging Face with Gemini as fallback AI provider

route group message extraction through AIOrchestrator for HuggingFace fallback on Groq rate limits

first commit