Fluffy 0.5.0

Added

• Lazy Playwright frame locators, nested frame scopes, content_frame/1, and Fluffy.FrameLocator.owner/1.
• Fluffy.OperationError for element-action failures across drivers, carrying backend, driver, operation, locator or file-chooser key, and the original cause.

Changed

• Browser action failures, including submit and file selection, now preserve native Playwright errors and call logs instead of inferring Fluffy.StrictnessError or Fluffy.ActionabilityError from a later DOM snapshot. Callers rescuing structural errors from public actions should rescue Fluffy.OperationError instead. Static and LiveView preserve structural errors in cause, wrapping only after action retries finish. Assertions remain ExUnit.AssertionError; invalid arguments and unsupported capabilities stay distinct.
• Browser assertions continue to raise ExUnit.AssertionError, retaining Playwright's received values, timeout details, and call logs. Candidate markup is no longer reconstructed.
• Require playwright_ex ~> 0.12.0 for locator evaluation and native assertion diagnostics.

Fixed

• Enforce strict locator resolution for focus, blur, and key presses, including ambiguous iframe owners.