Lamp 0.15.0

• Far more changes go into an open app without restarting it: a new method, computed property or stored
  property, a new case in an enum, a new default for an argument, a changed constant, a changed typealias, and
  what an extension adds from Objective-C. When a change can't go in that way, the chat says why in a sentence
  and the app shows a Reload button where it was, which puts the change in when you're ready; Undo, a restore and
  Rebuild & Open wait for it the same way.
• Before a change goes into an app, Lamp keeps a copy of the app's data from just before it, so a change that
  spoils what the app saved can be put right.
• Every app Lamp builds is drawn with Liquid Glass on macOS Tahoe, and the Reload button is glass too.
• The chat draws the agent's tables, headings, lists, code blocks and quotes, and its text can be selected.
• While the agent works, its steps are one line that says what it's doing now and opens to the rest, in Lamp's
  window and beside the app; what it writes on the way stays as a message. A build that runs long says so, and
  the agent names each command in its own words.
• Approvals ask only for what reaches beyond the app: a command that works on the app itself, its files, builds
  and tests, runs without a card.