feat(web): complete portable Blender feature gaps

web/protocol/physics-simulation.ts

@@ -28,6 +28,72 @@ export type PhysicsFamily = typeof PHYSICS_FAMILIES[number];
 export type PhysicsExecutionRequest = "METADATA" | "CACHE_MANIFEST" | "CACHE_PLAYBACK" | "LOCAL_SOLVER" | "SERVER_JOB";
 export type PhysicsSettingValue = boolean | number | string | null;
 
+/** Typed Main-authoring payloads for the physics families exposed by WebEngine. */
+export interface PhysicsRigidBodySettings {
+  type?: number;
+  mass?: number;
+  friction?: number;
+  restitution?: number;
+  collisionShape?: number;
+  kinematic?: boolean;
+  enabled?: boolean;
+  linearDamping?: number;
+  angularDamping?: number;
+  stepsPerSecond?: number;
+  solverIterations?: number;
+}
+
+export interface PhysicsClothSettings {
+  mass?: number;
+  airDamping?: number;
+  tensionStiffness?: number;
+  compressionStiffness?: number;
+  shearStiffness?: number;
+  bendingStiffness?: number;
+  springDamping?: number;
+  pinStiffness?: number;
+  quality?: number;
+  usePin?: boolean;
+}
+
+export interface PhysicsFluidSettings {
+  fluidType?: number;
+  domainType?: number;
+  resolution?: number;
+  timeScale?: number;
+  viscosity?: number;
+  gravity?: number;
+  cacheFrameStart?: number;
+  cacheFrameEnd?: number;
+  cacheType?: number;
+}
+
+export interface PhysicsSoftBodySettings {
+  nodeMass?: number;
+  gravity?: number;
+  mediaFriction?: number;
+  physicsSpeed?: number;
+  goalSpring?: number;
+  goalFriction?: number;
+  solverFlags?: number;
+}
+
+export interface PhysicsParticleCacheSettings {
+  frameStart?: number;
+  frameEnd?: number;
+  cacheType?: number;
+  compression?: number;
+  useDiskCache?: boolean;
+  pointCacheId?: string;
+}
+
+export interface PhysicsSimulationPlaybackSettings {
+  frame?: number;
+  playing?: boolean;
+  direction?: -1 | 1;
+  reset?: boolean;
+}
+
 export interface PhysicsCacheFrameIR {
   frame: number;
   byteOffset: number;