fix: import DSL and copy app not work

[hjlarry]

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Summary

Import DSL error:

2026-04-15 03:03:15,390 INFO [_internal.py:97] 5633a3747d 127.0.0.1 - - [15/Apr/2026 03:03:15] "OPTIONS /console/api/apps/imports HTTP/1.1" 200 -
2026-04-15 03:03:15,921 ERROR [app_dsl_service.py:308] af899746da Failed to import app
Traceback (most recent call last):
  File "/Users/hejl/projects/dify/api/services/app_dsl_service.py", line 278, in import_app
    app = self._create_or_update_app(
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/hejl/projects/dify/api/services/app_dsl_service.py", line 459, in _create_or_update_app
    app_was_created.send(app, account=account)
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/blinker/base.py", line 249, in send
    result = receiver(sender, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/hejl/projects/dify/api/events/event_handlers/create_installed_app_when_app_created.py", line 11, in handle
    tenant_id=app.tenant_id,
              ^^^^^^^^^^^^^
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/attributes.py", line 569, in __get__
    return self.impl.get(state, dict_)  # type: ignore[no-any-return]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/attributes.py", line 1096, in get
    value = self._fire_loader_callables(state, key, passive)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/attributes.py", line 1126, in _fire_loader_callables
    return state._load_expired(state, passive)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/state.py", line 828, in _load_expired
    self.manager.expired_attribute_loader(self, toload, passive)
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/loading.py", line 1674, in load_scalar_attributes
    result = load_on_ident(
             ^^^^^^^^^^^^^^
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/loading.py", line 510, in load_on_ident
    return load_on_pk_identity(
           ^^^^^^^^^^^^^^^^^^^^
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/loading.py", line 695, in load_on_pk_identity
    session.execute(
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/session.py", line 2351, in execute
    return self._execute_internal(
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/session.py", line 2239, in _execute_internal
    conn = self._connection_for_bind(bind)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/session.py", line 2103, in _connection_for_bind
    TransactionalContext._trans_ctx_check(self)
  File "/Users/hejl/projects/dify/api/.venv/lib/python3.12/site-packages/sqlalchemy/engine/util.py", line 111, in _trans_ctx_check
    raise exc.InvalidRequestError(
sqlalchemy.exc.InvalidRequestError: Can't operate on closed transaction inside context manager.  Please complete the context manager before emitting further commands.

Copy app error:

 File "/app/api/.venv/lib/python3.12/site-packages/flask/app.py", line 902, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)  # type: ignore[no-any-return]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/api/.venv/lib/python3.12/site-packages/flask_restx/api.py", line 404, in wrapper
    resp = resource(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/api/.venv/lib/python3.12/site-packages/flask/views.py", line 110, in view
    return current_app.ensure_sync(self.dispatch_request)(**kwargs)  # type: ignore[no-any-return]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/api/.venv/lib/python3.12/site-packages/flask_restx/resource.py", line 41, in dispatch_request
    resp = meth(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
File "/app/api/controllers/console/wraps.py", line 225, in decorated
    return view(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
File "/app/api/libs/login.py", line 100, in decorated_view
    return current_app.ensure_sync(func)(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/api/controllers/console/wraps.py", line 44, in decorated
    return view(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
File "/app/api/controllers/console/app/wraps.py", line 77, in decorated_view
    return view_func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/api/controllers/console/wraps.py", line 319, in decorated_function
    return f(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^
File "/app/api/controllers/console/app/app.py", line 663, in post
    app = session.scalar(stmt)
          ^^^^^^^^^^^^^^^^^^^^
File "/app/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/session.py", line 2399, in scalar
    return self._execute_internal(
           ^^^^^^^^^^^^^^^^^^^^^^^
File "/app/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/session.py", line 2239, in _execute_internal
    conn = self._connection_for_bind(bind)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/session.py", line 2103, in _connection_for_bind
    TransactionalContext._trans_ctx_check(self)
File "/app/api/.venv/lib/python3.12/site-packages/sqlalchemy/engine/util.py", line 111, in _trans_ctx_check
    raise exc.InvalidRequestError(
sqlalchemy.exc.InvalidRequestError: Can't operate on closed transaction inside context manager. Please complete the context manager before emitting further commands.

caused by #34693

Screenshots

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Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran make lint && make type-check (backend) and cd web && pnpm exec vp staged (frontend) to appease the lint gods

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