Fix editor regressions and add Blender scene and animated material import

tests/protocol.test.ts

@@ -184,3 +184,19 @@ test("real MCP HTTP + stdio share revisions, models, scripts, resources and expo
     await rm(dir, { recursive: true, force: true });
   }
 });
+
+test('MCP scene ZIP import replaces the scene atomically and Undo restores the prior project',async()=>{
+ const dir=await mkdtemp(path.join(os.tmpdir(),'forma-scene-'));
+ const s=await createService({projectDir:dir,port:0,blank:true});const client=new Client({name:'scene-test',version:'1'});
+ try{
+  await client.connect(new StreamableHTTPClientTransport(new URL(`http://127.0.0.1:${s.port}/mcp`),{requestInit:{headers:{authorization:'Bearer '+s.token}}}));
+  const original=structuredClone(s.service.store.project);
+  const {zipSync}=await import('fflate');const {sceneAnimationGlb}=await import('./fixtures.ts');
+  const archive=zipSync({'scene.glb':sceneAnimationGlb()});
+  const result=await client.callTool({name:'asset_import_glb',arguments:{expectedRevision:0,name:'scene.zip',base64:Buffer.from(archive).toString('base64'),asScene:true}});
+  assert.ok(!result.isError,JSON.stringify(result.content));
+  const p=s.service.store.project,n=p.scenes[0].entities[0];assert.equal(p.revision,1);assert.equal(n.components.camera.mode,'imported');assert.equal(n.components.animator.autoplay,'Scene');
+  const undo=await client.callTool({name:'history_undo',arguments:{expectedRevision:1}});assert.ok(!undo.isError,JSON.stringify(undo.content));
+  assert.equal(s.service.store.project.id,original.id);assert.equal(s.service.store.project.assets.length,0);
+ }finally{await client.close();await s.close();await rm(dir,{recursive:true,force:true});}
+});