feat(wizard): autocomplete barrios desde geo_paraguay_full.json [4F]

- BarrioAutocompleteField: carga JSON estático, filtra por depto/ciudad (2.1/2.2), mín 2 chars, máx 10 sugerencias, texto libre permitido, teclado (↑↓ Enter Escape), ARIA listbox
- QuestionRenderer: branch code === '2.3' → BarrioAutocompleteField; prop answers? pasado desde WizardForm para contexto depto/ciudad
- globals.css: clases .barrio-autocomplete-* (wrapper, list, item, item--active)
- Incluye public/data/geo_paraguay_full.json (202 KB, sin commitear hasta ahora)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/globals.css

@@ -289,6 +289,37 @@ body {
   box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
 }
 
+/* ── Barrio autocomplete ── */
+.barrio-autocomplete-wrapper { position: relative; }
+.barrio-autocomplete-list {
+  position: absolute;
+  top: calc(100% + 4px);
+  left: 0;
+  right: 0;
+  background: var(--color-surface);
+  border: 1.5px solid var(--color-border-focus);
+  border-radius: var(--radius);
+  box-shadow: 0 4px 12px rgba(0,0,0,0.10);
+  list-style: none;
+  margin: 0;
+  padding: 4px 0;
+  max-height: 220px;
+  overflow-y: auto;
+  z-index: 20;
+}
+.barrio-autocomplete-item {
+  padding: 9px 12px;
+  cursor: pointer;
+  font-size: 0.95rem;
+  color: var(--color-text);
+  transition: background 0.1s;
+}
+.barrio-autocomplete-item:hover,
+.barrio-autocomplete-item--active {
+  background: var(--color-primary-light);
+  color: var(--color-primary);
+}
+
 /* ── Textarea ── */
 .text-area {
   display: block;