Widget customization, display rules, response language, and Instructions.

New: Widget customization on the Deploy page: window corners, header alignment, and launcher button shape, with a live preview of the real widget.
New: A Response language setting. Bots can answer in the visitor's language or always in a chosen one, and the widget's labels follow suit.
New: An Instructions section under Brand & Voice for telling the bot how to behave, separate from the system prompt.
Improved: Deploy channel tabs show a status dot per channel, remember which tab you were on, and say what has not been saved yet.
Improved: Display rules (where the widget shows) use show/hide language, reorder correctly, and can be undone.
Improved: PDF and file training handles more document layouts.