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. v3.24.0 picks up web-api-cat 0.7.10: `preventDefault()` now honours the spec's `cancelable` gate -- it only flips `defaultPrevented` when the event was constructed with `cancelable: true`. On a default-constructed `new Event(type)` or a plain `{type: 'foo'}` literal it's a silent no-op. No tauri-runtime-servocat source change beyond the manifest. Seventh sub-crate of a Servo-replacement webview runtime targeting Tauri.