v3.11.0 editor polish: code rows on one line, left-aligned TAR values, green Add buttons

- PIN/ADM: label left, input right (one line per code) - five rows instead
  of the stacked label-above-input pairs.
- TAR rows: the TAR and MSL inputs are left-aligned like their headers and
  the cells use the header padding (px-2), so values and headers line up
  instead of the values floating centred.
- Add TAR and Add keyset: larger and green (bg-emerald-600) and both sit
  below their lists, left-aligned (Add keyset moved down from the header
  row; the "OTA keysets" label stays above the list).  The TAR hint is a
  plain paragraph under the button now.
- Guards: html.test.js pins the green/order of both buttons and the
  label-left code rows; cards_form.test.js pins the TAR row alignment.
  sw cache simple-v364.

Tests: 665 Python + 787 frontend green; the whole inline PWA script
syntax-checked.

frontend/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'simple-v363';
+const CACHE = 'simple-v364';
 const URLS = [
   'index.html',
   'help.html',