refactor(train): hoist submit_to_hf import to module top

The `from lerobot.jobs import submit_to_hf` was a function-local import in
train(); it pulls no heavy/optional deps and has no circular-import risk, so
move it to the top-level import block.

src/lerobot/scripts/lerobot_train.py

@@ -51,6 +51,7 @@ from lerobot.configs.train import TrainPipelineConfig
 from lerobot.datasets import EpisodeAwareSampler, compute_sampler_state
 from lerobot.datasets.factory import make_train_eval_datasets
 from lerobot.envs import close_envs, make_env, make_env_pre_post_processors
+from lerobot.jobs import submit_to_hf
 from lerobot.optim.factory import make_optimizer_and_scheduler
 from lerobot.policies import PreTrainedPolicy, make_policy, make_pre_post_processors
 from lerobot.rewards import make_reward_pre_post_processors
@@ -190,8 +191,6 @@ def train(cfg: TrainPipelineConfig, accelerator: "Accelerator | None" = None):
         accelerator: Optional Accelerator instance. If None, one will be created automatically.
     """
     if cfg.job.is_remote:
-        from lerobot.jobs import submit_to_hf
-
         return submit_to_hf(cfg)
 
     from lerobot.utils.import_utils import require_package

tests/scripts/test_train_remote_dispatch.py

@@ -54,10 +54,10 @@ def test_no_target_is_not_remote(monkeypatch):
 
 def test_train_dispatches_to_submit_when_remote(monkeypatch):
     """A remote --job.target short-circuits train() to the HF Jobs submitter."""
-    import lerobot.jobs
+    import lerobot.scripts.lerobot_train as train_module
 
     captured = []
-    monkeypatch.setattr(lerobot.jobs, "submit_to_hf", lambda cfg: captured.append(cfg) or "submitted")
+    monkeypatch.setattr(train_module, "submit_to_hf", lambda cfg: captured.append(cfg) or "submitted")
     cfg = draccus.parse(
         TrainPipelineConfig,
         args=["--dataset.repo_id", "u/d", "--policy.type", "act", "--job.target", "a10g-small"],