Demonstrates that a value set programmatically (simulating browser
autocomplete) correctly updates the bound Vue property via a triggered
input event.
How it works: "Simulate autocomplete" sets the raw DOM
value via the native setter (bypassing Inputmask's patched setter, the same
way browsers do during autocomplete) and then dispatches a native
input event. Inputmask processes the value and fires a second
input event that Vue picks up, keeping the property in sync.