AbstractContinuum 0.7.0

The About dialog is the compact card shared by every AbstractFramework app.
Nothing changes in the server, its flags or the gateway it needs.

Added

• Docs assistant. A book button in the top bar opens the chat shared by The app's CSP allows blob: images (the attached image's thumbnail is an in-page object URL, never a request).
  every AbstractFramework app: it answers from Continuum's own documentation
  (llms.txt, now shipped in the build and served at /llms.txt) through the
  gateway's docs-qa workflow, with streaming, copy, attachments and an icon to
  start a new conversation. The advisor keeps its own button. Needs a gateway
  that serves GET /api/gateway/docs/corpus?app=continuum.

Changed

• About is a compact card. The (i) About button opens a short card with
  the Continuum name and version, the AbstractFramework and AbstractGateway
  versions your gateway reports, one row of links (Website, Source, Docs,
  Issues, Feedback, Contact) and the copyright and licence line. It no longer
  lists every package installed on the gateway. When the gateway cannot
  answer, the gateway version says why (for example
  "unavailable (HTTP 404: Not Found)").
• Dependencies: @abstractframework/ui-kit ^0.8.0 and
  @abstractframework/panel-chat ^0.4.0.