refactor(ui): modulariza App.jsx y unifica branding y caché PWA

- Extrae App.jsx en módulos reutilizables: constants/ (categorias,
  provincias), utils/geo, styles/shared, hooks/usePwaInstall y
  components/ (StarRating, LocalCard, CampoUbicacion, BannerMovil,
  CategoriaBadge)
- AdminPanel reutiliza constantes y componentes compartidos y corrige
  la limpieza de suscripciones de Firebase al desmontar
- Añade logos de marca (logo-localesp.png + @2x) y regenera los iconos
  PWA con tamaños menores
- sw.js: sube la caché del shell a v2 e incluye los nuevos iconos y logos

src/constants/provincias.js

@@ -0,0 +1,34 @@
+// Provincias españolas y sus coordenadas aproximadas (capital de provincia),
+// usadas como centro de referencia en el mapa cuando un local no trae lat/lng propios.
+
+export const PROVINCIAS = [
+  "Álava", "Albacete", "Alicante", "Almería", "Asturias", "Ávila", "Badajoz", "Barcelona",
+  "Burgos", "Cáceres", "Cádiz", "Cantabria", "Castellón", "Ciudad Real", "Córdoba", "Cuenca",
+  "Gerona", "Granada", "Guadalajara", "Guipúzcoa", "Huelva", "Huesca", "Islas Baleares", "Jaén",
+  "La Coruña", "La Rioja", "Las Palmas", "León", "Lérida", "Lugo", "Madrid", "Málaga", "Murcia",
+  "Navarra", "Orense", "Palencia", "Pontevedra", "Salamanca", "Santa Cruz de Tenerife", "Segovia",
+  "Sevilla", "Soria", "Tarragona", "Teruel", "Toledo", "Valencia", "Valladolid", "Vizcaya",
+  "Zamora", "Zaragoza",
+];
+
+export const COORDS_PROVINCIAS = {
+  "Álava": [42.8467, -2.6726], "Albacete": [38.9942, -1.8585], "Alicante": [38.3452, -0.4815],
+  "Almería": [36.834, -2.4637], "Asturias": [43.3614, -5.8593], "Ávila": [40.6566, -4.6814],
+  "Badajoz": [38.8794, -6.9707], "Barcelona": [41.3851, 2.1734], "Burgos": [42.344, -3.6969],
+  "Cáceres": [39.4753, -6.3724], "Cádiz": [36.5271, -6.2886], "Cantabria": [43.4623, -3.8099],
+  "Castellón": [39.9864, -0.0513], "Ciudad Real": [38.9848, -3.9274], "Córdoba": [37.8882, -4.7794],
+  "Cuenca": [40.0704, -2.1374], "Gerona": [41.9794, 2.8214], "Granada": [37.1773, -3.5986],
+  "Guadalajara": [40.6328, -3.1614], "Guipúzcoa": [43.3183, -1.9812], "Huelva": [37.2614, -6.9447],
+  "Huesca": [42.1401, -0.4089], "Islas Baleares": [39.5696, 2.6502], "Jaén": [37.7796, -3.7849],
+  "La Coruña": [43.3623, -8.4115], "La Rioja": [42.4627, -2.4449], "Las Palmas": [28.1235, -15.4366],
+  "León": [42.5987, -5.5671], "Lérida": [41.6178, 0.62], "Lugo": [43.0097, -7.5567],
+  "Madrid": [40.4168, -3.7038], "Málaga": [36.7213, -4.4214], "Murcia": [37.9922, -1.1307],
+  "Navarra": [42.8169, -1.6432], "Orense": [42.3362, -7.8639], "Palencia": [42.0097, -4.5288],
+  "Pontevedra": [42.4333, -8.65], "Salamanca": [40.9701, -5.6635], "Santa Cruz de Tenerife": [28.4636, -16.2518],
+  "Segovia": [40.9429, -4.1088], "Sevilla": [37.3891, -5.9845], "Soria": [41.764, -2.464],
+  "Tarragona": [41.1189, 1.2445], "Teruel": [40.344, -1.1065], "Toledo": [39.8628, -4.0273],
+  "Valencia": [39.4699, -0.3763], "Valladolid": [41.6523, -4.7245], "Vizcaya": [43.263, -2.935],
+  "Zamora": [41.5034, -5.7446], "Zaragoza": [41.6488, -0.8891],
+};
+
+export const CENTRO_ESPANA = [40.4, -3.7];