fix: copy button HTTP fallback, reset-admin-password in Docker, scripts volume

- CellNetwork.jsx CopyButton: use execCommand fallback when clipboard API
  is unavailable (HTTP non-localhost context)
- Makefile reset-admin-password: run inside cell-api container via docker exec
  so bcrypt and all deps are available without host installation
- docker-compose.yml: mount ./scripts:/app/scripts:ro in cell-api so the
  reset script is accessible inside the container
- scripts/reset_admin_password.py: auto-detect API module path and data dir
  so the script works in both host (api/ sibling) and container (/app) layouts

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -206,6 +206,7 @@ services:
       - /var/run/docker.sock:/var/run/docker.sock
       - ./.env:/app/.env.compose
       - ./docker-compose.yml:/app/docker-compose.yml:ro
+      - ./scripts:/app/scripts:ro
     pid: host
     restart: unless-stopped
     networks: