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: replace Hugging Face with Gemini as fallback AI provider

fix: return tool error message when suppressing LLM reply

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

suppress LLM text reply after search_trips sends trip cards

fix: fall back to HuggingFace on empty response instead of hard error

feature: modify and delete driver trips

first commit