Continue between phases with the keyboard

Operators work with their hands on a barcode scanner, not a mouse, but only phases starting with a text input kept the keyboard alive — an acknowledge prompt, a switch, a radio group or a bare Continue step forced a reach for the mouse once per phase.

• Added keyboard focus on every prompt shape, so Enter — including the trailing Enter a barcode scanner sends — acknowledges a phase and moves to the next one.
• Added Cmd/Ctrl+Enter to confirm a prompt from anywhere, including inside a multi-line text field where Enter must stay a newline.
• Fixed a held Enter skipping a prompt the operator never saw, and restored focus to the form automatically after a failed send so a retry needs no mouse.
• Added a ⏎ hint on the Continue button, shown only when Enter really confirms.