fix: find unnamed cards and fit the served copy

An ArkOS or AmberELEC games part is named on the first screen and comes
first at the folder question. Packs that lack files are said so before
any plan. The served bootstrap gives advice that fits it, and the site
build refuses a copy whose pin is not its installer.

.github/workflows/deploy-site.yml

@@ -150,6 +150,13 @@ jobs:
           npm run build --prefix website
           python scripts/validate_site.py --site-dir website/dist
 
+      # The one-liner the site serves: each copy pins its own installer and
+      # says what a refusal means for it. Validation runs these too, but in
+      # another workflow this one never waits for: a copy that refuses every
+      # install must stop the deploy, the last good pair staying served.
+      - name: Check the served bootstraps
+        run: python -m unittest tests.test_site_bootstrap
+
       # The queries a visitor types must reach the page that answers them,
       # read through the site's own search box, and the home page must stay
       # under its weight budget. A miss blocks the deploy. The browser driver