wire llms, ui tweaks

.env.example

@@ -1,11 +1,24 @@
-# AWS Bedrock (production pattern)
+# LLM Provider (groq | anthropic | bedrock | openai)
+LLM_PROVIDER=groq
+
+# Groq (default — fast, free tier)
+GROQ_API_KEY=gsk_...
+GROQ_MODEL=llama-3.3-70b-versatile
+
+# Anthropic (direct SDK)
+ANTHROPIC_API_KEY=sk-ant-...
+ANTHROPIC_MODEL=claude-sonnet-4-20250514
+
+# AWS Bedrock
 AWS_ACCESS_KEY_ID=AKIA...
 AWS_SECRET_ACCESS_KEY=...
 AWS_DEFAULT_REGION=us-east-1
-USE_BEDROCK=false
+BEDROCK_MODEL_ID=anthropic.claude-sonnet-4-20250514-v1:0
 
-# Anthropic (fallback for local dev)
-ANTHROPIC_API_KEY=sk-ant-...
+# OpenAI-compatible (any endpoint)
+OPENAI_API_KEY=sk-...
+OPENAI_BASE_URL=https://api.openai.com/v1
+OPENAI_MODEL=gpt-4o
 
 # Kong Konnect (optional)
 KONG_PROXY_URL=