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/transaction-bulk-code/footer.html

@@ -1,5 +1,5 @@
 {# Modal footer: the form-errors sink on the left, the Save button on the right. Both
    pull from the shared view-model; the button reuses components/button.html. #}
 <div class="flex justify-end">
-  <div class="flex items-baseline gap-x-4">{% include "templates/transaction-bulk-code/form-errors.html" %}{% with classes=save.classes attrs=save.attrs loading_label=save.loading_label body=save.body %}{% include "templates/components/button.html" %}{% endwith %}</div>
+  <div class="flex items-baseline gap-x-4">{% include "templates/transaction-bulk-code/form-errors.html" %}{% with color=save.color extra=save.extra attrs=save.attrs loading_label=save.loading_label body=save.body %}{% include "templates/components/button.html" %}{% endwith %}</div>
 </div>