Cleanup init commit

ui/src/tok.js

@@ -0,0 +1,7 @@
+// Token display: leading/trailing spaces made visible with ˽ (like the original
+// JLens) — ' Paris' → '˽Paris', 'foo ' → 'foo˽'. Without this it's impossible to
+// tell ' Euro' from 'Euro' in the UI.
+export function fmtTok(s) {
+  if (s == null) return ''
+  return String(s).replace(/^ +| +$/g, (m) => '˽'.repeat(m.length))
+}