Seed from go-template-repo, renamed to simplexcalc

The template's files at a77fd30, without its history or LICENSE, after
script/rename simplexcalc.

Model: opus-5-5

static/js/app.js

@@ -0,0 +1,9 @@
+// The Content-Security-Policy this service sends forbids inline script
+// and third-party origins, so anything the pages need has to be a
+// same-origin file like this one. It is deliberately empty of
+// behaviour: it exists so the embedded-asset path is exercised by
+// something other than the stylesheet.
+//
+// Delete it, or fill it in, when seeding a real project.
+
+("use strict");