v1.11.1 — brand images inside the integration

• Brand icon and logo (256/512, transparent background) now live in
  custom_components/houseplan/brand/ — the native mechanism for custom
  integrations since Home Assistant 2026.3 (served via /api/brands/...,
  local images take priority over the brands CDN). The former root brand/
  directory is gone, and no home-assistant/brands PR is needed (theirs bot
  closes such PRs as obsolete).