MarkdownPreview.svelte

Rendered markdown, read-only — a file's content, or any markdown string. Scrolls on its own, so it can sit beside an editor; it takes focus like an editor does (focus_key), so arrow keys scroll it.

Its links never navigate the app. An external link opens in a new tab, an in-document #fragment scrolls the preview, and — given the file's path — a relative link opens the indexed file it names in a tab (see markdown_links.ts), a preview tab on a plain click and a kept tab on a middle- or Ctrl/Cmd-click; a link to a folder opens its README. Links the file index says are missing are marked broken, and ones it can't see marked unknown, each with a title saying why. Anything else — without a path, any relative link — does nothing.