Brings the AI noise suppression (ADR-0018) into the widget we actually ship.
The .7 package built and ran fine but carried no model assets, because the
embedded Vite config had publicDir off — the filter would have been dead only
inside the widget, and nowhere else.
Verified the whole chain locally rather than trusting the green build: the
23 MB of model and wasm arrive under webapp/widgets/element-call/assets/dfn3,
which is the path the widget requests at runtime.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>