feat: add ephemeral webcam faces and adaptive screens

src/engine/scene.ts

@@ -205,6 +205,10 @@ export interface SceneHandle {
   actorState(): Readonly<ActorControllerSnapshot> | null;
   /** Replace the visible local actor profile without disturbing its position or controls. */
   setActorIdentity(identity: ActorIdentity): void;
+  /** Attach a caller-owned face texture to the local humanoid, if one is active. */
+  attachActorFaceTexture(texture: THREE.Texture): boolean;
+  /** Detach the current local face texture without disposing caller ownership. */
+  clearActorFaceTexture(): void;
   setActorActive(active: boolean): void;
   actorActive(): boolean;
   setAircraftActions(actions: Partial<AircraftActionSnapshot>): void;
@@ -646,6 +650,8 @@ export async function createScene(
     setActorActions: (actions) => { sceneActor?.setActions(actions); },
     actorState: () => sceneActor?.state() ?? null,
     setActorIdentity: (identity) => { sceneActor?.setIdentity(identity); },
+    attachActorFaceTexture: (texture) => sceneActor?.attachFaceTexture(texture) ?? false,
+    clearActorFaceTexture: () => { sceneActor?.clearFaceTexture(); },
     setActorActive(active) {
       sceneActor?.setActive(active);
       if (active) {