Try the Get H&M search-box suggestions API

- With `query` given, the response carries `phrase_suggestions` (spelling-complete phrases) and `content_suggestions` (merchandised results). `trending_searches` and `popular_searches` are both empty in this mode. - With `query` omitted or empty, the response instead carries `trending_searches` and `popular_searches`. `phrase_suggestions` and `content_suggestions` are both empty in this mode. - `search_history` is part of the real upstream response but confirmed NOT session-scoped: separate cookie-free requests returned the identical list, so treat it as fixed default content, not a real per-caller search history, despite the field name. - `blocked` mirrors the same content-filter flag `hm-search`'s own `search_meta.blocked` documents; its exact trigger conditions are not documented by H&M. - `content_suggestions[]`/`popular_searches[]` entries do not all carry every field -- `link`, `deep_link`, `image_url`, and `content_type` are each populated only when H&M's own response includes them.