Fix CLEAR and UPLOAD action handling

[ysss22zz]

Summary

• include CLEAR and UPLOAD in action equivalence checks
• make create_upload_action() return ActionTypes.UPLOAD instead of ActionTypes.TYPE
• export create_clear_action and create_upload_action from browser_env
• update action tests and fix the duplicated element_id condition

Problem

ActionTypes.CLEAR and ActionTypes.UPLOAD are defined and used by action serialization, but is_equivalent() does not handle them. This causes test_is_equivalent to raise ValueError for CLEAR.

In addition, create_upload_action() currently creates a TYPE action, and the CLEAR/UPLOAD factory functions are not exported from browser_env, causing round-trip action creation tests to fail.

Testing

pytest -q tests/test_browser_env/test_actions.py

Result

2 passed