prev 2.0.0

Added

• The assistant: a chat panel beside the document, opened with the robot
  head on the toolbar, that answers about the file and works in it with
  prev's own tools, finding and pointing at things, marking up, filling
  in, editing, signing, redacting and exporting, asking first where
  Settings says to. Each window has its own chat, replies stream in as
  Markdown, models that think show their reasoning, and the model can be
  changed mid-chat.
• Settings' new Assistant tab adds models: a local model from a running
  Ollama or other OpenAI-compatible server on this computer or another,
  listed with what each can do, or a cloud model from Anthropic, OpenAI
  or Google Gemini with an API key, kept in the system keychain once per
  provider. Adding a model tries it first, and a problem, such as a key
  turned down or an account with no credit, says what to do.
• AI agents such as Claude Code control the prev you are using over MCP
  with prev --mcp: reading, showing, marking up, editing, signing,
  redacting and exporting in your own windows. prev asks before letting
  a new agent in, and Settings chooses which kinds of step ask first.
• The pointing hand over buttons and links is drawn as on macOS on Linux
  and Windows too, like the open and closed hands.

Changed

• Settings is split into tabs: General, Appearance, Assistant, Agents
  and Storage.
• On Windows and macOS, toolbars, side panels, menus and dialogs take
  the system's title bar color, and on macOS prev's toolbar color runs
  up behind the title bar.
• Colors follow a change of the system accent color straight away.
• The table of contents is 15% closer from line to line.
• The program is larger, 58 MB on Linux, as it now carries the agent
  server and the assistant's connections to its models.
• prev needs Rust 1.95 to build.

Fixed

• Bold text, as in Markdown, is drawn in Roboto Flex; on macOS it fell
  back to a monospaced font.
• On macOS, prev follows a switch between light and dark in System
  Settings.
• On Linux, prev starts in the desktop's light or dark setting even when
  the settings portal is slow to answer.
• With animations off, buttons and menu rows light up under the pointer
  straight away.
• Fit to width no longer shows a horizontal scrollbar, which rounding
  could bring up by a fraction of a pixel.