Refine knowledge brain workflow

Align the brain prompts, graph view, and startup defaults with the
latest phase 1 flow so local runs and navigation stay consistent.

docker-compose.yml

@@ -8,7 +8,7 @@ services:
     container_name: jarvis-backend
     restart: unless-stopped
     ports:
-      - "8000:8000"
+      - "9527:9527"
     volumes:
       - ./data:/data/jarvis
     env_file:
@@ -19,7 +19,7 @@ services:
       - UPLOAD_DIR=/data/jarvis/uploads
       - NAS_DATA_ROOT=/data/jarvis
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:8000/api/health"]
+      test: ["CMD", "curl", "-f", "http://localhost:9527/api/health"]
       interval: 30s
       timeout: 10s
       retries: 3