Screenshots of the pages a piece is about

Walls of text: pieces that talk about a page should show it. A build-time step (Playwright, outside the standard-library build; committed webp files under assets/shots/) captures the live page of each source a piece cites, and the piece shows a thumbnail with the target site's branding, linking to the local copy.

Plan: tools/screenshots.js reads data/index.json for the pages cited by desk files, captures at 1280 wide, writes assets/shots/<site>/<path>.webp plus a manifest with the capture time; the build shows them where the [shot: <url>] marker appears, or automatically in the byline block for the first two sources.

Done

Shipped in v0.1.12. tools/screenshots.js reads the sources: front matter of stories, editions, signals, history, maps and briefings (or data/index.json with --all), captures at 1200x750 as jpeg (webp is not a Playwright screenshot type) into assets/shots/<host>/<path>.jpg, and saves manifest.json after every page. The build shows the strip under a piece's byline for every source that has a capture, linking to the local copy. No [shot:] marker was needed.