Everything on the shared names — the copy-paste is gone

The ported markup was written a page at a time, so the same thing was said several ways. Counted before
touching anything: nine variants of the page gutter, seven max-widths, six link styles, two definitions of
an input, and one stray shadow.

Now: `container` (which already centres and pads), `measure`/`measure-wide`, `link`/`link-plain`/
`link-on-dark`, one `field`, `photo`, `page-head`. Nothing in a template writes `bg-white rounded-…
shadow-…` or `underline underline-offset-4` any more — 119 uses of `panel`, 82 of `label`, 52 of
`panel-lift`, 17 of `link`.

TWO REAL FIXES FELL OUT OF IT, not just tidying:

- Every section said `container mx-auto px-4`: `mx-auto` twice, and a px-4 that beat the responsive
  padding inside `container`. The gutter was 16px at every width, including on a 27-inch screen. Removing
  the copy-paste restores sm:px-6 lg:px-8, which is most of why the pages now breathe.
- The public form and the admin had grown two different inputs — cream vs white, ring-2 vs ring-1, py-2.5
  vs py-2, and different text sizes. There is one `field` now, and the same focus ring as everything else.

The admin uses the same names where they are the same thing (`link`, `field`, `h4`, `--radius-*`) and
keeps its own denser buttons, because it is a tool and not a shop front.

53 tests green. Every class used across all nine pages resolves in the compiled stylesheet — that check is
what makes a sweep this size safe to do with a script.

src/main/resources/templates/admin/catering.html

@@ -28,7 +28,7 @@
 
         <div class="flex-1 min-w-60">
           <a th:href="@{/admin/catering/tables/{id}(id=${table.id})}"
-             class="font-adbhashitha text-lg text-bakery-900 underline underline-offset-4"
+             class="link h4 text-bakery-900"
              th:text="${table.name}">Office</a>
           <p class="text-sm text-bakery-600">
             <span th:text="|${#lists.size(table.tiers)} column${#lists.size(table.tiers) == 1 ? '' : 's'}|">3 columns</span>,