fix(sdk): keep dynamic path flowing when scene is static

packages/sdk/lib/core/objects/Path.ts

@@ -65,6 +65,8 @@ export default class Path extends THREE.Mesh {
         if (Path.flowSignalBound) return;
         Path.flowSignalBound = true;
         useAddSignal("sceneRendered", Path.handleFlowTick);
+        // 立即请求一帧渲染，防止场景静止时 sceneRendered 永远不触发导致流动停止
+        (App.viewer as any)?.pluginRequestRender?.(true);
     }
 
     private static unbindFlowSignal() {