Update footer branding name from Kushyanth C to B

Update author name in LoginPage component

docs: update README with HuggingFace API migration, Groq API details, and refined deployment instructions

fix: add missing groq dependency and implement AsyncGroq for streaming endpoint

chore: remove sentence-transformers to prevent PyTorch OOM boot crash on Render free tier

fix: resolve logout routing, chat page document refresh state, and optimize HF model selection

fix: update HuggingFace Inference API URL to new router endpoint

fix: resolve Render OOM crash via HF API embeddings, fix signup message and mobile UI padding

fix(cors): safely parse origins by stripping whitespace

chore: trigger render auto-deploy

fix: add vercel.json for React Router client-side routing

docs: fix markdown image rendering for screenshots

docs: add screenshots and deployment instructions map

docs: personalize UI and README for portfolio with 'Made by Kushyanth C' branding

refactor: completely remove Gemini and OpenAI, make Groq the sole LLM provider