- Created .env.example with template for all environment variables
- Added DEEPSEEK_API_KEY for DeepSeek API integration
- Added SUPABASE_SERVICE_ROLE_KEY for server-side Supabase operations
- Updated .env.local with placeholder values (not committed due to .gitignore)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>