Swap chat AI model in existing Next.js/Supabase app (adult companion platform)

I have a working AI companion web app (Next.js + TypeScript, Supabase, deployed on Vercel). It currently generates chat responses via OpenRouter using one model. I need you to swap the chat-generation model to a different one I'll specify, keeping ALL existing functionality intact. IMPORTANT: This is an adult/NSFW companion platform. Please only apply if you're comfortable working on adult content. The app is already built and working. This is a CONTAINED task — a model swap — NOT a rebuild. Please do not rebuild or change anything beyond what's needed for the model swap. Must keep working (these already work — do not touch them): - Streaming responses (word-by-word output) - The memory system (cross-session memory) - Per-tier usage limits - Stripe subscriptions - Age verification (Didit integration) - Analytics - The existing child-safety content filters — these must stay fully intact and functioning Deliverables: 1. The chat-generation model swapped and working in production 2. Streaming still works correctly 3. All existing features confirmed still working 4. A short written note describing what you changed Tech stack: Next.js (App Router), TypeScript, Supabase, Vercel, currently using OpenRouter for chat generation. There is a CLAUDE.md file in the repo documenting the full architecture and rules. I'll provide repo access, documentation, and I'll add any new API credentials myself (you won't need to handle my secret keys directly). To apply, please answer: 1. Have you integrated LLM APIs (OpenRouter or similar) into a Next.js app before? Briefly describe one example. 2. Are you comfortable working on an adult/NSFW platform? 3. What's your estimated hours/cost and timeline for this? 4. Confirm you'll keep the existing safety filters intact. I have detailed documentation ready to share with whoever I hire. This should be a quick, well-defined job for the right person.