删掉回放的五个转发、重复的空格快捷键与重复的等待循环。

回放调用点直接走 replay_ctl，场景工具的路径引导收敛到 _paths，panel_snapshot
复用 panel_check 的 _wait_for，report_from 收成模块私有的 _report_from。

tools/scene_assets/bench_scene.py

@@ -37,13 +37,11 @@ import sys
 import time
 from pathlib import Path
 
+# Tests load this tool by file location, so add our own directory to the path.
+if str(Path(__file__).resolve().parent) not in sys.path:
+    sys.path.insert(0, str(Path(__file__).resolve().parent))
 
-def _bootstrap_paths() -> None:
-    here = Path(__file__).resolve()
-    repo = here.parents[2]
-    for path in (repo / "apps" / "studio" / "src", repo / "shared" / "src"):
-        if path.is_dir() and str(path) not in sys.path:
-            sys.path.insert(0, str(path))
+from _paths import bootstrap_paths  # noqa: E402
 
 
 def _percentiles(values: list[float]) -> dict[str, float]:
@@ -604,7 +602,7 @@ def main(argv: list[str] | None = None) -> int:
     parser.add_argument("--json", action="store_true")
     args = parser.parse_args(argv)
 
-    _bootstrap_paths()
+    bootstrap_paths()
     width, _, height = args.size.partition("x")
     if args.cpu_only:
         report, code = measure_cpu(