style(templates): format Selmer .html templates for readability

Many templates were minified onto a single line. Reformatted every template under
resources/templates/ with djLint (django profile, 2-space indent) so the markup,
{% %} blocks, and {{ }} interpolations are human-readable, plus hand-split the two
multi-<span> option partials (invoice-option / rule-option). Pure reflow — no markup,
tag, or text content changed (the only content-adjacent delta is harmless trailing
whitespace inside single-interpolation elements). link.html / panel-empty.html stay on
one line (single element). resources/public/index.html left as-is (already readable,
non-template static).

Full e2e suite 72/72 green (no rendering regressions).

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

resources/templates/components/validated-field.html

@@ -3,4 +3,10 @@
    carries any pass-through div attributes (the per-row location cell hangs its hx-* /
    x-dispatch swap wiring here); `body` is the pre-rendered inner control HTML;
    `errors_str` is the comma-joined string errors (empty when none). #}
-<div class="{{ classes }}"{{ attrs|safe }}>{% if label %}<label class="block mb-2 text-sm font-medium text-gray-900 dark:text-white">{{ label }}</label>{% endif %}{{ body|safe }}<p class="mt-2 text-xs text-red-600 dark:text-red-500 h-4">{{ errors_str }}</p></div>
+<div class="{{ classes }}"{{ attrs|safe }}>
+  {% if label %}
+    <label class="block mb-2 text-sm font-medium text-gray-900 dark:text-white">{{ label }}</label>
+  {% endif %}
+  {{ body|safe }}
+  <p class="mt-2 text-xs text-red-600 dark:text-red-500 h-4">{{ errors_str }}</p>
+</div>