Dori answers the chat

The chat at the bottom right of every page now has a face. The button shows Dori, the panel opens with Dori at the top and Dir looking along, and every answer comes in a bubble next to Dori, the way the conversation on the homepage already looks. Dori thinks while an answer streams in, smiles when it is there, looks surprised when something goes wrong and proud when your ticket has been created. Everything else stays as it was: each answer carries the AI label, the sources are linked below it, "Talk to a human" turns the conversation into a ticket, and Escape closes the panel.