Bindings between boa-cat (JS engine) and the DOM (html-cat tree) plus fetch (net-cat). v0.7.0 opens the Storage chapter: `localStorage` and `sessionStorage` ship as Storage-shaped Objects exposing `getItem` / `setItem` / `removeItem` / `clear` / `key` plus a `length` accessor; the `window` global is now a proper Object whose `document` / `localStorage` / `sessionStorage` properties point at the matching top-level bindings. Hosts seed pre-eval and read post-eval via `lookup_local_storage` / `seed_storage` / `read_storage_items`, mirroring the v0.4 cookie pattern. Seventh sub-crate of a Servo-replacement webview runtime targeting Tauri.