Servo-replacement runtime for Tauri: wires html-cat, css-cat, dom-cat, layout-cat, paint-cat, net-cat, boa-cat, ecma-runtime-cat, and web-api-cat into a single rendering + scripting pipeline. v3.31.0 picks up web-api-cat 0.7.19 + 0.7.20. 0.7.19 finishes the form-state pseudo trio with `:disabled` and `:enabled`, tag-gated to the HTML form-control set. 0.7.20 wires the `<img>` element to scripts via a seven-property accessor pack: `src` / `alt` / `width` / `height` reflect HTML attributes, and `naturalWidth` / `naturalHeight` / `complete` read hidden state slots that this runtime will populate from the fetch + decode pipeline. Public helpers `web_api_cat::image::set_natural_size` and `set_complete` are now the integration points for the downstream image-rendering chunk. No tauri-runtime-servocat source change beyond the manifest in this release. Seventh sub-crate of a Servo-replacement webview runtime targeting Tauri.