Fix trip seat filtering and enable null seats display

feat: replace Gemini with OpenRouter as fallback AI provider

feat: replace Hugging Face with Gemini as fallback AI provider

feat: support multiple phone numbers and prevent duplicate customers

support unregistered drivers from group messages and warm new user onboarding

replace numbered trip list with trip cards for driver delete/modify/list

rename booking leads to trip selections

feat: send trip cards as individual messages and resolve trip_id from replies

feature: modify and delete driver trips

change to (remoteJid)

first commit