'Type Text' step is ignored when it follows 'Open URL'

Confirmed in code: actions.rs:395 only refreshes the macro's current_hwnd after Wait (ms) / Wait for Input / Open App / Focus Window / Click at Position. Open URL is not in that list, so the next step still targets Trigr's HWND. Plus, browsers take time to focus — even refreshing HWND immediately may miss it. Fix: (a) add Open URL to the HWND-refresh list, and (b) bake in a short focus-stabilisation delay (e.g. 250ms) inside the Open URL step that the runtime applies before continuing.