Release v0.8.4 — Newest AI models, one-click CLI updates and synced split scrolling

Three updates came out today: 0.8.2, 0.8.3 and 0.8.4. If you skipped any of them, everything they bring is listed below, newest first.

Thanks to @zkendall and @sunao1222 for their contributions.

New in 0.8.4

See the newest Claude Code and Codex models in the AI panel as soon as your installed CLI knows them, without waiting for a MerMark update
Update Claude Code or Codex with one click when a newer version is out: the AI panel and Settings → AI show an Update button
Pick the reasoning effort each Codex model supports, including Extra high, Max and Ultra where available
New default models: the latest Opus for Claude, and Codex's own default model for Codex

Choose editor margins in Settings → Editor: Small, Medium, Large or Pageless, which fills the whole editor area (#169)
Move through the workspace file tree with the keyboard: arrow keys, Home/End, Enter to open, F2 to rename (#170)
See the print preview split into real pages, so you can check page breaks and page numbers before printing (#163)
Install MerMark on NixOS with the included Nix package (#174)

Fix headers, footers and page numbers missing from printouts on Linux and macOS (#163)
Fix the Paragraph/Headings list in the toolbar doing nothing (#171)
Fix line breaks and paragraphs inside quotes being merged into one line when saving (#173)
Fix auto-save writing an empty file while the code view is open
Fix numbered equations showing (0) and scrollbars around formulas in the PDF preview and printout
Fix dollar amounts in indented code being shown as formulas in files with Windows line endings
Fix a crafted image or link address in a Markdown file adding unwanted behaviour to the page