Kudzu 0.8.31 - Async native-handler ownership

Kudzu 0.8.31 completes P0.4 by tying every mounted native-handler context to its DOM registration lifetime. Async work may finish after route, keyed, or conditional removal, but it cannot write through ownership that no longer exists.

Changed

• Native registrations expose one active lifetime to direct setters, captured setters, queued commits, and captured object refs.
• unmountNative() invalidates the registration before removing its listener. Enhanced navigation, keyed removal, and conditional removal use the shared unmount hook; non-persisted pagehide directly releases document registrations.
• Late state writes become no-ops instead of recreating released state IDs; already queued commits clear without touching replacement DOM.
• Captured object refs resolve to null after release, so a late handler cannot find a replacement node that reused the same compiler-owned ref ID.
• Application promises are not cancelled, and no scheduler, task registry, component runtime, or public API is added.

Performance

• Twenty-one alternating headless Chrome processes measured 5,000 synchronous native event dispatches at a 6.4 ms median for both 0.8.30 and 0.8.31; the recorded ranges overlap.
• The maintained native-bubbling fixture keeps the same eight JavaScript paths. kudzu-native.js and kudzu-serialization.js add 209 B raw / 94 B aggregate gzip; the runner rejects any other artifact change.
• Environment, raw arrays, artifact bytes, methodology, and limitations are recorded in PERFORMANCE.md.

Validation

• npm run check, npm test, npm run test:package, and all 189 tests pass.
• Chrome starts async route and keyed-row handlers, releases and recreates their owners, and proves late state writes and refs cannot mutate replacement ownership. A persistent layout handler also proves non-persisted document disposal invalidates pending work.
• Focused context checks cover queued direct commits and captured setters. The browser suite retains normal synchronous native event semantics; unaffected static routes remain zero JavaScript.
• P0.5 atomic and collision-safe output is next.

Upgrade

npm install @kudzujs/core@^0.8.31