chore(tools): shoot.mjs --scale for print-resolution screenshots

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tools/shoot.mjs

@@ -29,6 +29,7 @@ const ANON = args.includes('--anon');   // signed out: the first-run screens
 const WITH_FRIEND = args.includes('--with-friend');  // a second account, befriended and online
 const RAW_THEME = args.includes('--raw-theme');
 const DROP_ASSETS = argOf('--drop-assets', '');   // regex: stored asset ids to hide, to preview the built-in art
+const SCALE = Number(argOf('--scale', '2'));      // device pixel ratio of the shots (4 for print work)
 const PUSH = argOf('--push', '');
 const PARAMS = argOf('--params', '{}');
 const NAME = argOf('--name', PUSH);
@@ -169,7 +170,7 @@ try {
     if ((m.type() === 'warn' || m.type() === 'warning') && m.text().includes('[i18n] missing')) errors.push(`[${current}] ` + m.text());
   });
   page.on('pageerror', e => errors.push(`[${current}] PAGEERROR ` + String(e).slice(0, 200)));
-  await page.setViewport({ width: W, height: H, deviceScaleFactor: 2, isMobile: true, hasTouch: true });
+  await page.setViewport({ width: W, height: H, deviceScaleFactor: SCALE, isMobile: true, hasTouch: true });
 
   await page.setRequestInterception(true);
   page.on('request', async req => {