{"message":"Welcome to Echo - AI Shopping Assistant","version":"1.0.0","endpoints":{"/chat":"POST - Chat with Echo customer agent","/chat/stream":"POST - Same body as /chat; SSE (text/event-stream) with components, text_delta, done","/brand_chat":"POST - Chat with Echo insights agent (for brand managers)","/conversations/{store_id}":"GET - List conversations (paginated, filtered, sorted)","/conversation/{id}":"GET - View single conversation","/sync_product":"POST - Sync product to database (passive, background)","/dashboard/{store_id}":"GET - Get analytics dashboard","/knowledge/gaps/{store_id}":"GET - Get knowledge gaps","/knowledge/{store_id}":"GET - Get all knowledge entries","/knowledge":"POST - Add knowledge entry","/knowledge/ingest":"POST multipart - Upload .txt/.csv/.pdf/.docx → Q&A preview","/embed":"POST - Generate embeddings (forwards to QWEN-3 endpoint)","/echo/integrated":"GET - Check if Echo is integrated for a store (query param: store_id, cached)","/health":"GET - Health check"}}