Generalize live field bindings and use them for Studio canvas gestures

src/capability-model/types.ts

@@ -132,6 +132,8 @@ interface InterfaceMemberBase<Type = ValueType> {
 
 export interface ValueInterfaceMember<Type = ValueType> extends InterfaceMemberBase<Type> {
   kind: "value";
+  /** Every operation resolves directly to the same native state slot. */
+  nativeField?: true;
   queryRead?: QueryReadContract;
   valueType: Type;
 }