feat: add full Spanish translation (#57)

* feat(i18n): add spanish translation support

* refactor(i18n): refine spanish copy for es-es

* refactor(i18n): translate addon titles to spanish

client/src/components/Admin/AddonManager.tsx

@@ -136,8 +136,21 @@ interface AddonRowProps {
   t: (key: string) => string
 }
 
+function getAddonLabel(t: (key: string) => string, addon: Addon): { name: string; description: string } {
+  const nameKey = `admin.addons.catalog.${addon.id}.name`
+  const descKey = `admin.addons.catalog.${addon.id}.description`
+  const translatedName = t(nameKey)
+  const translatedDescription = t(descKey)
+
+  return {
+    name: translatedName !== nameKey ? translatedName : addon.name,
+    description: translatedDescription !== descKey ? translatedDescription : addon.description,
+  }
+}
+
 function AddonRow({ addon, onToggle, t }: AddonRowProps) {
   const isComingSoon = false
+  const label = getAddonLabel(t, addon)
   return (
     <div className="flex items-center gap-4 px-6 py-4 border-b transition-colors hover:opacity-95" style={{ borderColor: 'var(--border-secondary)', opacity: isComingSoon ? 0.5 : 1, pointerEvents: isComingSoon ? 'none' : 'auto' }}>
       {/* Icon */}
@@ -148,7 +161,7 @@ function AddonRow({ addon, onToggle, t }: AddonRowProps) {
       {/* Info */}
       <div className="flex-1 min-w-0">
         <div className="flex items-center gap-2">
-          <span className="text-sm font-semibold" style={{ color: 'var(--text-primary)' }}>{addon.name}</span>
+          <span className="text-sm font-semibold" style={{ color: 'var(--text-primary)' }}>{label.name}</span>
           {isComingSoon && (
             <span className="text-[9px] font-semibold px-2 py-0.5 rounded-full" style={{ background: 'var(--bg-tertiary)', color: 'var(--text-faint)' }}>
               Coming Soon
@@ -161,7 +174,7 @@ function AddonRow({ addon, onToggle, t }: AddonRowProps) {
             {addon.type === 'global' ? t('admin.addons.type.global') : t('admin.addons.type.trip')}
           </span>
         </div>
-        <p className="text-xs mt-0.5" style={{ color: 'var(--text-muted)' }}>{addon.description}</p>
+        <p className="text-xs mt-0.5" style={{ color: 'var(--text-muted)' }}>{label.description}</p>
       </div>
 
       {/* Toggle */}

client/src/components/Admin/GitHubPanel.tsx

@@ -1,6 +1,6 @@
 import { useState, useEffect } from 'react'
 import { Tag, Calendar, ExternalLink, ChevronDown, ChevronUp, Loader2, Heart, Coffee } from 'lucide-react'
-import { useTranslation } from '../../i18n'
+import { getLocaleForLanguage, useTranslation } from '../../i18n'
 import apiClient from '../../api/client'
 
 const REPO = 'mauriceboe/NOMAD'
@@ -46,7 +46,7 @@ export default function GitHubPanel() {
 
   const formatDate = (dateStr) => {
     const d = new Date(dateStr)
-    return d.toLocaleDateString(language === 'de' ? 'de-DE' : 'en-US', { day: 'numeric', month: 'short', year: 'numeric' })
+    return d.toLocaleDateString(getLocaleForLanguage(language), { day: 'numeric', month: 'short', year: 'numeric' })
   }
 
   // Simple markdown-to-html for release notes (handles headers, bold, lists, links)

client/src/components/Dashboard/TimezoneWidget.tsx

@@ -23,9 +23,9 @@ const POPULAR_ZONES = [
   { label: 'Cairo', tz: 'Africa/Cairo' },
 ]
 
-function getTime(tz) {
+function getTime(tz, locale) {
   try {
-    return new Date().toLocaleTimeString('de-DE', { timeZone: tz, hour: '2-digit', minute: '2-digit' })
+    return new Date().toLocaleTimeString(locale, { timeZone: tz, hour: '2-digit', minute: '2-digit' })
   } catch { return '—' }
 }
 
@@ -41,7 +41,7 @@ function getOffset(tz) {
 }
 
 export default function TimezoneWidget() {
-  const { t } = useTranslation()
+  const { t, locale } = useTranslation()
   const [zones, setZones] = useState(() => {
     const saved = localStorage.getItem('dashboard_timezones')
     return saved ? JSON.parse(saved) : [
@@ -70,7 +70,7 @@ export default function TimezoneWidget() {
 
   const removeZone = (tz) => setZones(zones.filter(z => z.tz !== tz))
 
-  const localTime = new Date().toLocaleTimeString('de-DE', { hour: '2-digit', minute: '2-digit' })
+  const localTime = new Date().toLocaleTimeString(locale, { hour: '2-digit', minute: '2-digit' })
   const rawZone = Intl.DateTimeFormat().resolvedOptions().timeZone
   const localZone = rawZone.split('/').pop().replace(/_/g, ' ')
   // Show abbreviated timezone name (e.g. CET, CEST, EST)
@@ -96,7 +96,7 @@ export default function TimezoneWidget() {
         {zones.map(z => (
           <div key={z.tz} className="flex items-center justify-between group">
             <div>
-              <p className="text-lg font-bold tabular-nums" style={{ color: 'var(--text-primary)' }}>{getTime(z.tz)}</p>
+              <p className="text-lg font-bold tabular-nums" style={{ color: 'var(--text-primary)' }}>{getTime(z.tz, locale)}</p>
               <p className="text-[10px]" style={{ color: 'var(--text-faint)' }}>{z.label} <span style={{ color: 'var(--text-muted)' }}>{getOffset(z.tz)}</span></p>
             </div>
             <button onClick={() => removeZone(z.tz)} className="opacity-0 group-hover:opacity-100 p-1 rounded transition-all" style={{ color: 'var(--text-faint)' }}>
@@ -116,7 +116,7 @@ export default function TimezoneWidget() {
               onMouseEnter={e => e.currentTarget.style.background = 'var(--bg-hover)'}
               onMouseLeave={e => e.currentTarget.style.background = 'transparent'}>
               <span className="font-medium">{z.label}</span>
-              <span className="text-[10px]" style={{ color: 'var(--text-faint)' }}>{getTime(z.tz)}</span>
+              <span className="text-[10px]" style={{ color: 'var(--text-faint)' }}>{getTime(z.tz, locale)}</span>
             </button>
           ))}
         </div>

client/src/components/Layout/DemoBanner.tsx

@@ -86,6 +86,38 @@ const texts: Record<string, DemoTexts> = {
     selfHostLink: 'self-host it',
     close: 'Got it',
   },
+  es: {
+    titleBefore: 'Bienvenido a ',
+    titleAfter: '',
+    title: 'Bienvenido a la demo de TREK',
+    description: 'Puedes ver, editar y crear viajes. Todos los cambios se restablecen automáticamente cada hora.',
+    resetIn: 'Próximo reinicio en',
+    minutes: 'minutos',
+    uploadNote: 'Las subidas de archivos (fotos, documentos, portadas) están desactivadas en el modo demo.',
+    fullVersionTitle: 'Además, en la versión completa:',
+    features: [
+      'Subida de archivos (fotos, documentos, portadas)',
+      'Gestión de claves API (Google Maps, tiempo)',
+      'Gestión de usuarios y permisos',
+      'Copias de seguridad automáticas',
+      'Gestión de addons (activar/desactivar)',
+      'Inicio de sesión único OIDC / SSO',
+    ],
+    addonsTitle: 'Complementos modulares (se pueden desactivar en la versión completa)',
+    addons: [
+      ['Vacaciones', 'Planificador de vacaciones con calendario, festivos y fusión de usuarios'],
+      ['Atlas', 'Mapa del mundo con países visitados y estadísticas de viaje'],
+      ['Equipaje', 'Listas de comprobación para cada viaje'],
+      ['Presupuesto', 'Control de gastos con reparto'],
+      ['Documentos', 'Adjunta archivos a los viajes'],
+      ['Widgets', 'Conversor de divisas y zonas horarias'],
+    ],
+    whatIs: '¿Qué es TREK?',
+    whatIsDesc: 'Un planificador de viajes autohospedado con colaboración en tiempo real, mapas interactivos, inicio de sesión OIDC y modo oscuro.',
+    selfHost: 'Código abierto — ',
+    selfHostLink: 'alójalo tú mismo',
+    close: 'Entendido',
+  },
 }
 
 const featureIcons = [Upload, Key, Users, Database, Puzzle, Shield]
@@ -159,7 +191,7 @@ export default function DemoBanner(): React.ReactElement | null {
           <div style={{ display: 'flex', alignItems: 'center', gap: 8, marginBottom: 6 }}>
             <Map size={14} style={{ color: '#111827' }} />
             <span style={{ fontSize: 12, fontWeight: 700, color: '#111827', display: 'flex', alignItems: 'center', gap: 4 }}>
-              {language === 'de' ? 'Was ist ' : 'What is '}<img src="/text-dark.svg" alt="TREK" style={{ height: 13, marginRight: -2 }} />?
+              {t.whatIs}
             </span>
           </div>
           <p style={{ fontSize: 12, color: '#64748b', lineHeight: 1.5, margin: 0 }}>{t.whatIsDesc}</p>

client/src/components/Layout/Navbar.tsx

@@ -67,6 +67,12 @@ export default function Navbar({ tripTitle, tripId, onBack, showBack, onShare }:
     updateSetting('dark_mode', dark ? 'light' : 'dark').catch(() => {})
   }
 
+  const getAddonName = (addon: Addon): string => {
+    const key = `admin.addons.catalog.${addon.id}.name`
+    const translated = t(key)
+    return translated !== key ? translated : addon.name
+  }
+
   return (
     <nav style={{
       background: dark ? 'rgba(9,9,11,0.95)' : 'rgba(255,255,255,0.95)',
@@ -124,7 +130,7 @@ export default function Navbar({ tripTitle, tripId, onBack, showBack, onShare }:
                   onMouseEnter={e => e.currentTarget.style.background = 'var(--bg-hover)'}
                   onMouseLeave={e => { if (!isActive) e.currentTarget.style.background = 'transparent' }}>
                   <Icon className="w-3.5 h-3.5" />
-                  <span className="hidden md:inline">{addon.name}</span>
+                  <span className="hidden md:inline">{getAddonName(addon)}</span>
                 </Link>
               )
             })}

client/src/components/PDF/TripPDF.tsx

@@ -165,7 +165,7 @@ export async function downloadTripPDF({ trip, days, places, assignments, categor
 
           const chips = [
             place.place_time ? `<span class="chip">${svgClock}${escHtml(place.place_time)}</span>` : '',
-            place.price && parseFloat(place.price) > 0 ? `<span class="chip chip-green">${svgEuro}${Number(place.price).toLocaleString('de-DE')} EUR</span>` : '',
+            place.price && parseFloat(place.price) > 0 ? `<span class="chip chip-green">${svgEuro}${Number(place.price).toLocaleString(loc)} EUR</span>` : '',
           ].filter(Boolean).join('')
 
           return `
@@ -377,7 +377,7 @@ export async function downloadTripPDF({ trip, days, places, assignments, categor
         <div class="cover-stat-lbl">${escHtml(tr('pdf.planned'))}</div>
       </div>
       ${totalCost > 0 ? `<div>
-        <div class="cover-stat-num">${totalCost.toLocaleString('de-DE')}</div>
+        <div class="cover-stat-num">${totalCost.toLocaleString(loc)}</div>
         <div class="cover-stat-lbl">${escHtml(tr('pdf.costLabel'))}</div>
       </div>` : ''}
     </div>

client/src/components/Photos/PhotoGallery.tsx

@@ -3,7 +3,7 @@ import { PhotoLightbox } from './PhotoLightbox'
 import { PhotoUpload } from './PhotoUpload'
 import { Upload, Camera } from 'lucide-react'
 import Modal from '../shared/Modal'
-import { useTranslation } from '../../i18n'
+import { getLocaleForLanguage, useTranslation } from '../../i18n'
 import type { Photo, Place, Day } from '../../types'
 
 interface PhotoGalleryProps {
@@ -17,7 +17,7 @@ interface PhotoGalleryProps {
 }
 
 export default function PhotoGallery({ photos, onUpload, onDelete, onUpdate, places, days, tripId }: PhotoGalleryProps) {
-  const { t } = useTranslation()
+  const { t, language } = useTranslation()
   const [lightboxIndex, setLightboxIndex] = useState(null)
   const [showUpload, setShowUpload] = useState(false)
   const [filterDayId, setFilterDayId] = useState('')
@@ -53,7 +53,7 @@ export default function PhotoGallery({ photos, onUpload, onDelete, onUpdate, pla
         <div style={{ marginRight: 'auto' }}>
           <h2 style={{ margin: 0, fontSize: 18, fontWeight: 700, color: '#111827' }}>Fotos</h2>
           <p style={{ margin: '2px 0 0', fontSize: 12.5, color: '#9ca3af' }}>
-            {photos.length} Foto{photos.length !== 1 ? 's' : ''}
+            {photos.length} {photos.length !== 1 ? 'Fotos' : 'Foto'}
           </p>
         </div>
 
@@ -65,7 +65,7 @@ export default function PhotoGallery({ photos, onUpload, onDelete, onUpdate, pla
           <option value="">{t('photos.allDays')}</option>
           {(days || []).map(day => (
             <option key={day.id} value={day.id}>
-              Tag {day.day_number}{day.date ? ` · ${formatDate(day.date)}` : ''}
+              {t('planner.dayN', { n: day.day_number })}{day.date ? ` · ${formatDate(day.date, getLocaleForLanguage(language))}` : ''}
             </option>
           ))}
         </select>
@@ -84,7 +84,7 @@ export default function PhotoGallery({ photos, onUpload, onDelete, onUpdate, pla
           className="flex items-center gap-2 bg-slate-900 text-white px-4 py-2 rounded-lg hover:bg-slate-700 text-sm font-medium whitespace-nowrap"
         >
           <Upload className="w-4 h-4" />
-          Fotos hochladen
+          {t('common.upload')}
         </button>
       </div>
 
@@ -101,7 +101,7 @@ export default function PhotoGallery({ photos, onUpload, onDelete, onUpdate, pla
               style={{ display: 'inline-flex', margin: '0 auto' }}
             >
               <Upload className="w-4 h-4" />
-              Fotos hochladen
+              {t('common.upload')}
             </button>
           </div>
         ) : (
@@ -146,7 +146,7 @@ export default function PhotoGallery({ photos, onUpload, onDelete, onUpdate, pla
       <Modal
         isOpen={showUpload}
         onClose={() => setShowUpload(false)}
-        title="Fotos hochladen"
+        title={t('common.upload')}
         size="lg"
       >
         <PhotoUpload
@@ -211,7 +211,7 @@ function PhotoThumbnail({ photo, days, places, onClick }: PhotoThumbnailProps) {
   )
 }
 
-function formatDate(dateStr) {
+function formatDate(dateStr, locale) {
   if (!dateStr) return ''
-  return new Date(dateStr + 'T00:00:00').toLocaleDateString('de-DE', { day: 'numeric', month: 'short' })
+  return new Date(dateStr + 'T00:00:00').toLocaleDateString(locale, { day: 'numeric', month: 'short' })
 }

client/src/components/Photos/PhotoLightbox.tsx

@@ -227,10 +227,10 @@ export function PhotoLightbox({ photos, initialIndex, onClose, onUpdate, onDelet
   )
 }
 
-function formatDate(dateStr) {
+function formatDate(dateStr, locale = 'en-US') {
   if (!dateStr) return ''
   try {
-    return new Date(dateStr).toLocaleDateString('de-DE', { day: 'numeric', month: 'long', year: 'numeric' })
+    return new Date(dateStr).toLocaleDateString(locale, { day: 'numeric', month: 'long', year: 'numeric' })
   } catch { return '' }
 }
 

client/src/components/Planner/DayDetailPanel.tsx

@@ -8,7 +8,7 @@ import { weatherApi, accommodationsApi } from '../../api/client'
 import CustomSelect from '../shared/CustomSelect'
 import CustomTimePicker from '../shared/CustomTimePicker'
 import { useSettingsStore } from '../../store/settingsStore'
-import { useTranslation } from '../../i18n'
+import { getLocaleForLanguage, useTranslation } from '../../i18n'
 import type { Day, Place, Category, Reservation, AssignmentsMap } from '../../types'
 
 const WEATHER_ICON_MAP = {
@@ -53,7 +53,7 @@ interface DayDetailPanelProps {
 }
 
 export default function DayDetailPanel({ day, days, places, categories = [], tripId, assignments, reservations = [], lat, lng, onClose, onAccommodationChange }: DayDetailPanelProps) {
-  const { t, language } = useTranslation()
+  const { t, language, locale } = useTranslation()
   const isFahrenheit = useSettingsStore(s => s.settings.temperature_unit) === 'fahrenheit'
   const is12h = useSettingsStore(s => s.settings.time_format) === '12h'
   const fmtTime = (v) => formatTime12(v, is12h)
@@ -138,7 +138,7 @@ export default function DayDetailPanel({ day, days, places, categories = [], tri
   if (!day) return null
 
   const formattedDate = day.date ? new Date(day.date + 'T00:00:00').toLocaleDateString(
-    language === 'de' ? 'de-DE' : 'en-US',
+    getLocaleForLanguage(language),
     { weekday: 'long', day: 'numeric', month: 'long' }
   ) : null
 
@@ -270,7 +270,7 @@ export default function DayDetailPanel({ day, days, places, categories = [], tri
                         </div>
                         {r.reservation_time?.includes('T') && (
                           <span style={{ fontSize: 10, color: 'var(--text-muted)', whiteSpace: 'nowrap', flexShrink: 0 }}>
-                            {new Date(r.reservation_time).toLocaleTimeString(language === 'de' ? 'de-DE' : 'en-US', { hour: '2-digit', minute: '2-digit', hour12: is12h })}
+                            {new Date(r.reservation_time).toLocaleTimeString(locale, { hour: '2-digit', minute: '2-digit', hour12: is12h })}
                             {r.reservation_end_time && ` – ${fmtTime(r.reservation_end_time)}`}
                           </span>
                         )}
@@ -423,7 +423,7 @@ export default function DayDetailPanel({ day, days, places, categories = [], tri
                           onChange={v => setHotelDayRange(prev => ({ start: v, end: Math.max(v, prev.end) }))}
                           options={days.map((d, i) => ({
                             value: d.id,
-                            label: `${d.title || t('planner.dayN', { n: i + 1 })}${d.date ? ` — ${new Date(d.date + 'T00:00:00').toLocaleDateString(language === 'de' ? 'de-DE' : 'en-US', { day: 'numeric', month: 'short' })}` : ''}`,
+                            label: `${d.title || t('planner.dayN', { n: i + 1 })}${d.date ? ` — ${new Date(d.date + 'T00:00:00').toLocaleDateString(locale, { day: 'numeric', month: 'short' })}` : ''}`,
                           }))}
                           size="sm"
                         />
@@ -435,7 +435,7 @@ export default function DayDetailPanel({ day, days, places, categories = [], tri
                           onChange={v => setHotelDayRange(prev => ({ start: Math.min(prev.start, v), end: v }))}
                           options={days.map((d, i) => ({
                             value: d.id,
-                            label: `${d.title || t('planner.dayN', { n: i + 1 })}${d.date ? ` — ${new Date(d.date + 'T00:00:00').toLocaleDateString(language === 'de' ? 'de-DE' : 'en-US', { day: 'numeric', month: 'short' })}` : ''}`,
+                            label: `${d.title || t('planner.dayN', { n: i + 1 })}${d.date ? ` — ${new Date(d.date + 'T00:00:00').toLocaleDateString(locale, { day: 'numeric', month: 'short' })}` : ''}`,
                           }))}
                           size="sm"
                         />

client/src/components/Planner/PlaceInspector.tsx

@@ -312,7 +312,7 @@ export default function PlaceInspector({
                   icon={<Star size={12} fill="#facc15" color="#facc15" />}
                   text={<>
                     {googleDetails.rating.toFixed(1)}
-                    {googleDetails.rating_count ? <span style={{ opacity: 0.5 }}> ({googleDetails.rating_count.toLocaleString('de-DE')})</span> : ''}
+                    {googleDetails.rating_count ? <span style={{ opacity: 0.5 }}> ({googleDetails.rating_count.toLocaleString(locale)})</span> : ''}
                     {shortReview && <span className="hidden md:inline" style={{ opacity: 0.6, fontWeight: 400, fontStyle: 'italic', overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}> · „{shortReview.text}"</span>}
                   </>}
                   color="var(--text-secondary)" bg="var(--bg-hover)"

client/src/components/Vacay/VacayMonthCard.tsx

@@ -5,8 +5,10 @@ import type { HolidaysMap, VacayEntry } from '../../types'
 
 const WEEKDAYS_EN = ['Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa', 'Su']
 const WEEKDAYS_DE = ['Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa', 'So']
+const WEEKDAYS_ES = ['Lu', 'Ma', 'Mi', 'Ju', 'Vi', 'Sa', 'Do']
 const MONTHS_EN = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']
 const MONTHS_DE = ['Januar', 'Februar', 'März', 'April', 'Mai', 'Juni', 'Juli', 'August', 'September', 'Oktober', 'November', 'Dezember']
+const MONTHS_ES = ['Enero', 'Febrero', 'Marzo', 'Abril', 'Mayo', 'Junio', 'Julio', 'Agosto', 'Septiembre', 'Octubre', 'Noviembre', 'Diciembre']
 
 interface VacayMonthCardProps {
   year: number
@@ -25,8 +27,8 @@ export default function VacayMonthCard({
   onCellClick, companyMode, blockWeekends
 }: VacayMonthCardProps) {
   const { language } = useTranslation()
-  const weekdays = language === 'de' ? WEEKDAYS_DE : WEEKDAYS_EN
-  const monthNames = language === 'de' ? MONTHS_DE : MONTHS_EN
+  const weekdays = language === 'de' ? WEEKDAYS_DE : language === 'es' ? WEEKDAYS_ES : WEEKDAYS_EN
+  const monthNames = language === 'de' ? MONTHS_DE : language === 'es' ? MONTHS_ES : MONTHS_EN
 
   const weeks = useMemo(() => {
     const firstDay = new Date(year, month, 1)

client/src/components/Vacay/VacaySettings.tsx

@@ -1,7 +1,7 @@
 import { useState, useEffect } from 'react'
 import { MapPin, CalendarOff, AlertCircle, Building2, Unlink, ArrowRightLeft, Globe } from 'lucide-react'
 import { useVacayStore } from '../../store/vacayStore'
-import { useTranslation } from '../../i18n'
+import { getIntlLanguage, useTranslation } from '../../i18n'
 import { useToast } from '../shared/Toast'
 import CustomSelect from '../shared/CustomSelect'
 import apiClient from '../../api/client'
@@ -24,7 +24,7 @@ export default function VacaySettings({ onClose }: VacaySettingsProps) {
   useEffect(() => {
     apiClient.get('/addons/vacay/holidays/countries').then(r => {
       let displayNames
-      try { displayNames = new Intl.DisplayNames([language === 'de' ? 'de' : 'en'], { type: 'region' }) } catch { /* */ }
+      try { displayNames = new Intl.DisplayNames([getIntlLanguage(language)], { type: 'region' }) } catch { /* */ }
       const list = r.data.map(c => ({
         value: c.countryCode,
         label: displayNames ? (displayNames.of(c.countryCode) || c.name) : c.name,
@@ -49,7 +49,7 @@ export default function VacaySettings({ onClose }: VacaySettingsProps) {
       })
       if (allCounties.size > 0) {
         let subdivisionNames
-        try { subdivisionNames = new Intl.DisplayNames([language === 'de' ? 'de' : 'en'], { type: 'region' }) } catch { /* */ }
+        try { subdivisionNames = new Intl.DisplayNames([getIntlLanguage(language)], { type: 'region' }) } catch { /* */ }
         const regionList = [...allCounties].sort().map(c => {
           let label = c.split('-')[1] || c
           // Try Intl for full subdivision name (not all browsers support subdivision codes)