fix(wizard): z-index dropdown barrio + texto cortado opciones

Issue A: barrio-autocomplete-list cambia a position:fixed + getBoundingClientRect()
para escapar el overflow-y:auto de wizard-answer-area que clippeaba el dropdown.
z-index: 20 → 30 (clearear sticky topbar/bottombar z-index:10 en stacking context raíz).
Listener de scroll cierra el dropdown si el contenedor scrollea.

Issue B: wizard-answer-area max-height 360px → 480px (desktop) / 320px → 400px (mobile)
para mostrar ~8 opciones completas. .wizard-answer-area.has-overflow { padding-bottom: 44px }
asegura que el fade ::after (28px) cubre espacio vacío, no texto de opción.

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

app/globals.css

@@ -292,10 +292,9 @@ body {
 /* ── Barrio autocomplete ── */
 .barrio-autocomplete-wrapper { position: relative; }
 .barrio-autocomplete-list {
-  position: absolute;
-  top: calc(100% + 4px);
-  left: 0;
-  right: 0;
+  /* position: fixed + top/left/width set by JS via getBoundingClientRect()
+     so the list escapes any overflow:auto ancestor (wizard-answer-area) */
+  position: fixed;
   background: var(--color-surface);
   border: 1.5px solid var(--color-border-focus);
   border-radius: var(--radius);
@@ -305,7 +304,7 @@ body {
   padding: 4px 0;
   max-height: 220px;
   overflow-y: auto;
-  z-index: 20;
+  z-index: 30;
 }
 .barrio-autocomplete-item {
   padding: 9px 12px;
@@ -629,10 +628,11 @@ body {
 .wizard-answer-area {
   flex: 0 1 auto;
   min-height: 0;
-  max-height: 360px;
+  max-height: 480px;
   overflow-y: auto;
   padding-bottom: 8px;
 }
+.wizard-answer-area.has-overflow { padding-bottom: 44px; }
 /* El fade SOLO se pinta cuando .wizard-answer-area mide overflow real
    (clase has-overflow agregada por JS — ver wizard-form.tsx). CSS no tiene
    forma de detectar scrollHeight > clientHeight por sí solo: un ::after
@@ -672,7 +672,7 @@ body {
 @media (max-width: 480px) {
   .wizard-prompt-text { font-size: 1.1875rem; }
   .wizard-section-title { font-size: 1.5rem; }
-  .wizard-answer-area { max-height: 320px; }
+  .wizard-answer-area { max-height: 400px; }
 }
 
 /* ── Loading skeleton ── */

components/widgets/barrio-autocomplete-field.tsx

@@ -1,5 +1,5 @@
 'use client'
-import { useState, useEffect, useRef, type ReactNode } from 'react'
+import { useState, useEffect, useRef, type CSSProperties, type ReactNode } from 'react'
 
 type GeoData = Record<string, Record<string, string[]>>
 
@@ -27,6 +27,8 @@ export function BarrioAutocompleteField({
   const [geoData, setGeoData] = useState<GeoData | null>(null)
   const [open, setOpen] = useState(false)
   const [activeIdx, setActiveIdx] = useState(-1)
+  const [dropdownStyle, setDropdownStyle] = useState<CSSProperties>({})
+  const inputRef = useRef<HTMLInputElement>(null)
 
   useEffect(() => {
     fetch('/data/geo_paraguay_full.json')
@@ -35,6 +37,24 @@ export function BarrioAutocompleteField({
       .catch(() => {})
   }, [])
 
+  // Close dropdown on scroll so the fixed-position list doesn't drift from the input
+  useEffect(() => {
+    if (!open) return
+    const close = () => setOpen(false)
+    window.addEventListener('scroll', close, { passive: true, capture: true })
+    return () => window.removeEventListener('scroll', close, { capture: true })
+  }, [open])
+
+  function computeDropdownStyle() {
+    if (!inputRef.current) return
+    const rect = inputRef.current.getBoundingClientRect()
+    setDropdownStyle({
+      top: rect.bottom + 4,
+      left: rect.left,
+      width: rect.width,
+    })
+  }
+
   const barrios: string[] = (() => {
     if (!geoData) return []
     if (departamento && ciudad) {
@@ -54,6 +74,7 @@ export function BarrioAutocompleteField({
 
   function handleInput(v: string) {
     onChange(v)
+    computeDropdownStyle()
     setOpen(true)
     setActiveIdx(-1)
   }
@@ -104,9 +125,10 @@ export function BarrioAutocompleteField({
           aria-activedescendant={activeIdx >= 0 ? `${name}-opt-${activeIdx}` : undefined}
           autoComplete="off"
           className="text-short-input"
+          ref={inputRef}
           onChange={(e) => handleInput(e.target.value)}
           onKeyDown={handleKeyDown}
-          onFocus={() => { if (suggestions.length > 0) setOpen(true) }}
+          onFocus={() => { if (suggestions.length > 0) { computeDropdownStyle(); setOpen(true) } }}
           onBlur={() => setTimeout(() => setOpen(false), 150)}
         />
         {open && suggestions.length > 0 && (
@@ -115,6 +137,7 @@ export function BarrioAutocompleteField({
             role="listbox"
             className="barrio-autocomplete-list"
             aria-label="Sugerencias de barrios"
+            style={dropdownStyle}
           >
             {suggestions.map((barrio, i) => (
               <li