refactor(ssr): make the bulk-code form-ctx data-only

Move the remaining static markup out of the bulk-code form view-model and into
the templates, leaving form-ctx as plain data (plus a urls map and two button
contexts). The form/vendor hx-wiring, the status <option> list, the per-row
transition / location-swap / remove wiring, and the field names are now literal
in the templates, built from the row index and the shared urls.

- form.html: form attrs literal; ids render name="ids[N]" via forloop.counter0.
- body.html: vendor-changed wiring literal; status is an inline <select> with
  literal options (selected via {% if status.value = ... %}); field wrappers use
  {% if has_error %}has-error.
- account-row.html: the <tr> transitions, db/id hidden, location-cell swap and
  remove <a> are literal with {{ row.index }} / {{ urls.changed }}; only the
  Alpine x-data, errors, and the typeahead/location/money control contexts are
  passed as data.
- form-ctx / account-row-vm reduced to data; drop the now-unused
  sc/validated-field-classes.

Tradeoff: the status <select> and the remove <a> inline the shared base classes
(those partials can't take literal option labels / per-row wiring), so those two
class strings are duplicated in the bulk-code templates.

Verified: moved wiring correct by targeted checks (ids[N], form/vendor hx-*,
account-row-N, location swap + remove with index, status selected, no unrendered
tags); full browser flow green -- open (3 ids), vendor auto-populate, status
set+persist, add/remove row, submit "Transactions Coded", no JS errors. Shared
component class-sets unchanged (this commit only touches bulk-code).

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

resources/templates/transaction-bulk-code/form.html

@@ -2,4 +2,4 @@
    every sub-template composes from it via includes/blocks. The resolved (not-locked)
    transaction id set rides in hidden ids[] fields so the selection survives
    form-changed / submit posts without an EDN snapshot or a filter round-trip. #}
-<form id="bulk-code-form"{{ form_attrs|safe }}>{% for id in ids %}<input type="hidden" name="{{ id.name }}" value="{{ id.value }}">{% endfor %}<div class="" @click.outside="open=false" id="bulkcodemodal">{% include "templates/transaction-bulk-code/card.html" %}</div></form>
+<form id="bulk-code-form" hx-ext="response-targets" hx-swap="outerHTML" hx-target-400="#form-errors .error-content" hx-trigger="submit" hx-target="this" hx-post="{{ urls.submit }}">{% for id in ids %}<input type="hidden" name="ids[{{ forloop.counter0 }}]" value="{{ id }}">{% endfor %}<div class="" @click.outside="open=false" id="bulkcodemodal">{% include "templates/transaction-bulk-code/card.html" %}</div></form>