fix: P0-5 — upload-status rollback, streaming copy (LOCAL only), user re-verify, honest lock

B1: `_mark_upload_failed_and_raise` now commits on a separate session
  - Helper takes `request + upload_id`, opens a fresh session from
    `request.app.state.session_factory` and commits there before raising.
  - Closes the named-lock connection-pool leak Codex flagged: the old
    "commit-on-the-same-session" implementation could return the
    GET_LOCK connection to the pool before the enclosing
    `finally: release_named_lock` ran, leaking `mp:<hash>` for up to
    `pool_recycle` and re-opening the same-key upload race.
  - Same helper now used by `create_server_object_payload`'s put-failure
    branch — two failure paths have identical semantics.

B2: streaming copy for soft-delete + restore (`get_stream() + put()`)
  - LOCAL backend: zero-copy (aiofiles stream write). OOM fixed.
  - S3 backend: still OOMs on multi-GB objects — `put()` materializes
    the async iter via `b"".join(chunks)`. Multipart `put` is a
    follow-up; do NOT claim "OOM fixed on production" since production
    defaults to S3.

C1: worker re-verifies `Users.status='active' AND is_deleted=0`
  - `_assert_user_active` called from `_execution_context` after
    resolving `triggered_by`; skips `SYSTEM_CRON_USER_ID`.
  - `USER_DISABLED` error_code goes into the `NODE_FINISHED_EVENT`
    outbox payload — `schedule_node_runs` has no `error_code` column,
    the row only carries the `message` text. Docstrings corrected to
    say so explicitly (previous docstring falsely promised row-level
    observability).

F1: honest browser-local file lock
  - `api.ts` `acquireFileLock/heartbeatFileLock/releaseFileLock/
    releaseFileLockOnUnload` are now no-ops with comments stating they
    never call the network.
  - `scriptWorkspaceStore` dropped `tickHeartbeats`; `tickCleanup`
    simplified to just clear cache.
  - `useEditSessionLifecycle` dropped its 15s heartbeat `setInterval`.
  - `ScriptWorkspace.tsx` renders `.local-lock-banner` info bar when
    `isEditing`. Two tabs may still silently last-write — banner is the
    only guard (acceptable disclosure-only tradeoff).

Dead code: deleted the duplicate `upload_bytes_to_session` in
`backend/src/backend/storage_api.py`. The `services.storage` import
is now the only source of the function; `create_upload_record`'s
docstring updated to point at `backend.resources`.

backend/tests/test_scripts.py

@@ -498,6 +498,63 @@ async def test_soft_delete_object_sets_is_deleted() -> None:
     assert result["data"]["object_status"] == "deleted"
 
 
+@pytest.mark.asyncio
+async def test_soft_delete_object_streams_via_get_stream() -> None:
+    """P0-5 / B2: 必须走 ``get_stream()`` 流式迁移,不能调 ``get()``
+    把整个对象加载到内存(10G 对象会 OOM)。"""
+    from backend.services.storage import soft_delete_object
+
+    item = _storage_object_row()
+    # 让 storage_backend 与 settings 一致,确保走"移动到 trash"分支
+    item.storage_backend = settings.storage_backend
+    item.object_status = "available"
+    item.bucket_name = "workspace"
+    item.object_key = "ws/u/file.bin"
+    item.usage_type = "working_copy"
+
+    source_store = MagicMock()
+    # 模拟一个 async generator 作为 get_stream 的返回值
+    async def _fake_stream(_key, _chunk_size=65536):
+        yield b"chunk-1"
+        yield b"chunk-2"
+    source_store.get_stream.side_effect = _fake_stream
+    source_store.put = AsyncMock()
+    source_store.delete = AsyncMock()
+
+    trash_store = MagicMock()
+    trash_store.put = AsyncMock()
+    trash_store.delete = AsyncMock()
+
+    request = MagicMock()
+    request.app.state.object_stores = {
+        item.bucket_name: source_store,
+        "trash": trash_store,
+    }
+
+    session = AsyncMock()
+    session.scalar = AsyncMock(return_value=item)
+
+    # 捕获原 key —— helper 在移动后会把 item.object_key 重写成 trash_key,
+    # 不捕获的话下面断言会拿不到原值。
+    original_object_key = item.object_key
+
+    await soft_delete_object(
+        storage_object_id=item.storage_object_id,
+        request=request,
+        session=session,
+    )
+
+    # get_stream 必须被调用;get() 不应被调用 —— 否则仍是全量加载路径
+    source_store.get_stream.assert_called_once_with(original_object_key)
+    source_store.get.assert_not_called()
+    # 源对象删除 —— 同样用原始 key 断言(item.object_key 已被 helper 改写)
+    source_store.delete.assert_awaited_once_with(original_object_key)
+    # 目标桶写入走 put(接受 async iter),trash_key 尾部拼 storage_object_id
+    trash_store.put.assert_awaited_once()
+    put_args, _ = trash_store.put.call_args
+    assert put_args[0] == f"workspace/{original_object_key}-{item.storage_object_id}"
+
+
 @pytest.mark.asyncio
 async def test_jupyter_check_notebook_lock_ignores_deleted_scripts() -> None:
     """``is_deleted == 0`` filter must hide deleted notebooks from Jupyter checks."""

backend/tests/test_storage_upload_status.py

@@ -0,0 +1,149 @@
+"""Unit tests for ``upload_bytes_to_session`` failure-path status persistence.
+
+P0-5 / B1: the route handler wraps every request in ``session_scope``
+(``backend.dependencies.database_session``), which rolls back on
+exception. A naive ``upload.upload_status = "failed"; raise HTTPException(...)``
+loses the status flip and leaves the row stuck in ``created``/``uploading``
+forever. The fix is ``_mark_upload_failed_and_raise`` which opens a
+*separate* session from ``request.app.state.session_factory`` and commits
+the status change on it before raising. The outer rollback is then a
+no-op on the caller's session, AND the named-lock connection (acquired
+inside the helper's caller for the size/hash/storage failure branches)
+stays pristine so ``release_named_lock`` runs on the same connection that
+ran ``GET_LOCK`` — closing the lock-leak window Codex flagged.
+
+These tests exercise the helper directly + the expired-status branch of
+``upload_bytes_to_session`` with a mocked session.
+"""
+from __future__ import annotations
+
+from datetime import datetime, timedelta
+from types import SimpleNamespace
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+from fastapi import HTTPException
+
+from backend.services.storage import (
+    _mark_upload_failed_and_raise,
+    upload_bytes_to_session,
+)
+
+
+def _make_upload(upload_id: str = "01UPL0000000000000000000A") -> SimpleNamespace:
+    """Minimal UploadSessions row with the columns the helper touches."""
+    return SimpleNamespace(
+        upload_id=upload_id,
+        upload_status="uploading",
+        expires_at=None,
+        expected_size_bytes=None,
+        expected_hash=None,
+        bucket_name="workspace",
+        object_key="ws/user/file.bin",
+        object_key_hash=b"\x00" * 32,
+    )
+
+
+class _AsyncContextManager:
+    """Async context manager that yields ``session`` on enter.
+
+    Used to mock the result of ``session_factory()`` without pulling in
+    a real SQLAlchemy engine.
+    """
+
+    def __init__(self, session: object) -> None:
+        self._session = session
+
+    async def __aenter__(self) -> object:
+        return self._session
+
+    async def __aexit__(self, *_args: object) -> None:
+        return None
+
+
+async def test_mark_upload_failed_and_raise_persists_status() -> None:
+    """The helper must open a fresh session, mark 'failed', commit, then
+    raise — surviving both the surrounding ``session_scope`` rollback and
+    the named-lock connection-pool leak the original implementation opened
+    up by committing on the lock-bound session.
+    """
+    upload = _make_upload()
+    fresh_session = SimpleNamespace(
+        scalar=AsyncMock(return_value=upload),
+        commit=AsyncMock(),
+    )
+    session_factory = MagicMock(return_value=_AsyncContextManager(fresh_session))
+    request = SimpleNamespace(
+        app=SimpleNamespace(state=SimpleNamespace(session_factory=session_factory)),
+    )
+
+    with pytest.raises(HTTPException) as excinfo:
+        await _mark_upload_failed_and_raise(
+            request, upload.upload_id, 409, "size mismatch",
+        )
+
+    assert excinfo.value.status_code == 409
+    assert excinfo.value.detail == "size mismatch"
+    assert upload.upload_status == "failed"
+    # The fresh session — not the caller's — must have committed.
+    fresh_session.scalar.assert_awaited_once()
+    fresh_session.commit.assert_awaited_once()
+    session_factory.assert_called_once()
+
+
+async def test_mark_upload_failed_and_raise_raises_even_if_upload_missing() -> None:
+    """If the row has been hard-deleted between the caller's lookup and the
+    helper's separate-session write, the helper still raises HTTPException
+    with the requested status/detail — it just skips the commit. The caller
+    still gets the same error contract.
+    """
+    fresh_session = SimpleNamespace(
+        scalar=AsyncMock(return_value=None),
+        commit=AsyncMock(),
+    )
+    session_factory = MagicMock(return_value=_AsyncContextManager(fresh_session))
+    request = SimpleNamespace(
+        app=SimpleNamespace(state=SimpleNamespace(session_factory=session_factory)),
+    )
+
+    with pytest.raises(HTTPException) as excinfo:
+        await _mark_upload_failed_and_raise(
+            request, "01UPL0000000000000000000A", 503, "boom",
+        )
+
+    assert excinfo.value.status_code == 503
+    assert excinfo.value.detail == "boom"
+    # No row to update, so commit must NOT have been called.
+    fresh_session.commit.assert_not_awaited()
+
+
+async def test_upload_bytes_to_session_expired_commits_status() -> None:
+    """The early ``if upload.expires_at < now`` branch must also
+    commit the expired status, otherwise a client retrying after the
+    expiry window would see ``created`` again and re-upload.
+
+    The expired branch is OUTSIDE the named-lock critical section, so it
+    can still commit on the caller's session safely — no separate-session
+    detour is needed.
+    """
+    expired_upload = _make_upload()
+    expired_upload.upload_status = "created"
+    # expires_at < utcnow_naive() triggers the expired branch.
+    expired_upload.expires_at = datetime.utcnow() - timedelta(minutes=1)
+
+    session = SimpleNamespace(
+        scalar=AsyncMock(return_value=expired_upload),
+        commit=AsyncMock(),
+        get=AsyncMock(return_value=None),
+    )
+    request = SimpleNamespace(
+        app=SimpleNamespace(state=SimpleNamespace(object_stores={})),
+    )
+
+    with pytest.raises(HTTPException) as excinfo:
+        await upload_bytes_to_session("01UPL0000000000000000000A", session, request)
+
+    assert excinfo.value.status_code == 409
+    assert "expired" in excinfo.value.detail
+    assert expired_upload.upload_status == "expired"
+    session.commit.assert_awaited()