refactor(ssr): shared component partials own their CSS classes

Bake the Tailwind class base into the shared Selmer component partials so the
partials own their markup and callers pass only data + a small variant
(width / size / color). Applies across all four modals that share them
(bulk-code, invoices, sales-summaries, transaction-edit).

- typeahead / select / location-select / money-input / validated-field /
  button / a-button / a-icon-button: the class base, the validated-field
  has-error toggle, and the button color ladders now live in the .html. The
  sc/*-ctx fns pass width / variant / extra / color plus the non-class attrs
  (computed exactly as before, so every non-class attribute is unchanged).
- bulk-code templates updated to the new partial contracts; account-row pulls
  money-input and a-icon-button in via includes.

Verified: every component's class SET is identical to before across all
variants (14/14 oracle match -- buttons reorder/dedupe classes, CSS is
order-independent); bulk-code full render is DOM-equivalent to the pre-sweep
baseline (class-set + attr-order normalized) for empty / populated / error;
browser QA of bulk-code (full flow) and transaction-edit (open + render) clean,
no JS errors; invoices + sales-summaries compile and render through the same
sc/* fns.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

resources/templates/components/location-select.html

@@ -1,7 +1,7 @@
 {# Location <select> for a transaction account row. Plain-HTML attributes -- the Selmer
    migration target (no Hiccup keyword/string attribute ambiguity). Rendered into the
    surrounding Hiccup row via the auto-ap.ssr.selmer interop bridge. #}
-<select name="{{ name }}" class="{{ classes }}">
+<select name="{{ name }}" class="bg-gray-50 border text-sm rounded-lg block p-2.5 border-gray-300 text-gray-900 focus:ring-blue-500 focus:border-blue-500 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500 group-[.has-error]:bg-red-50 group-[.has-error]:border-red-500 group-[.has-error]:text-red-900 group-[.has-error]:placeholder-red-700 group-[.has-error]:focus:ring-red-500 group-[.has-error]:dark:bg-gray-700 group-[.has-error]:focus:border-red-500 group-[.has-error]:dark:text-red-500 group-[.has-error]:dark:placeholder-red-500 group-[.has-error]:dark:border-red-500 {{ variant }}">
   {% for opt in options %}
     <option value="{{ opt.value }}"{% if opt.selected %} selected{% endif %}>{{ opt.label }}</option>
   {% endfor %}