chore: initial project setup with backend, frontend, and infrastructure

Add complete NexaPantry application structure including:
- Docker Compose configuration with PostgreSQL, Redis, FastAPI backend, worker, frontend and Caddy
- Environment configuration template with database, auth, and service settings
- GitHub Actions CI workflow for backend/frontend linting, testing, auditing and Docker builds
- AGPL-3.0 license and comprehensive README with setup, development, and security documentation
- Backend

frontend/src/i18n/dictionaries.ts

@@ -0,0 +1,139 @@
+import type { Language } from '../types';
+
+export const dictionaries: Record<Language, Record<string, string>> = {
+  de: {
+    setupTitle: 'NexaPantry einrichten',
+    setupSubtitle: 'Erstelle den ersten Instance Admin und sichere die Instanz ab.',
+    name: 'Name',
+    email: 'E-Mail',
+    password: 'Passwort',
+    language: 'Sprache',
+    theme: 'Theme',
+    publicUrl: 'Öffentliche Server-URL',
+    instanceName: 'Instanzname',
+    timezone: 'Zeitzone',
+    completeSetup: 'Setup abschließen',
+    login: 'Anmelden',
+    logout: 'Abmelden',
+    home: 'Home',
+    inventory: 'Bestand',
+    add: 'Hinzufügen',
+    shopping: 'Einkauf',
+    profile: 'Profil',
+    admin: 'Admin',
+    dashboard: 'Dashboard',
+    users: 'Benutzer',
+    homes: 'Homes',
+    mail: 'Mail',
+    security: 'Sicherheit',
+    notifications: 'Benachrichtigungen',
+    system: 'System',
+    logs: 'Logs',
+    backupRestore: 'Backup/Restore',
+    categories: 'Kategorien',
+    locations: 'Orte',
+    manualAdd: 'Manuell hinzufügen',
+    scanBarcode: 'Barcode scannen',
+    productName: 'Produktname',
+    barcode: 'Barcode',
+    brand: 'Marke',
+    category: 'Kategorie',
+    location: 'Lagerort',
+    quantity: 'Menge',
+    unit: 'Einheit',
+    expiresAt: 'Ablaufdatum',
+    minQuantity: 'Mindestbestand',
+    notes: 'Notizen',
+    save: 'Speichern',
+    cancel: 'Abbrechen',
+    ok: 'haltbar',
+    soon: 'läuft bald ab',
+    expired: 'abgelaufen',
+    addToShopping: 'Zur Einkaufsliste',
+    recipes: 'Rezepte',
+    onboardingTitle: 'Willkommen in NexaPantry',
+    onboardingDone: 'Tutorial abschließen',
+    skip: 'Überspringen',
+    createHome: 'Home erstellen',
+    joinHome: 'Home per Code beitreten',
+    joinCode: 'Join-Code',
+    smtpHost: 'SMTP Host',
+    smtpPort: 'SMTP Port',
+    smtpUser: 'SMTP User',
+    smtpPassword: 'SMTP Passwort',
+    senderAddress: 'Absender-Adresse',
+    senderName: 'Absender-Name',
+    testMail: 'Testmail senden',
+    light: 'Light',
+    dark: 'Dark',
+    systemTheme: 'System'
+  },
+  en: {
+    setupTitle: 'Set up NexaPantry',
+    setupSubtitle: 'Create the first instance admin and secure the server.',
+    name: 'Name',
+    email: 'E-mail',
+    password: 'Password',
+    language: 'Language',
+    theme: 'Theme',
+    publicUrl: 'Public server URL',
+    instanceName: 'Instance name',
+    timezone: 'Timezone',
+    completeSetup: 'Complete setup',
+    login: 'Sign in',
+    logout: 'Sign out',
+    home: 'Home',
+    inventory: 'Inventory',
+    add: 'Add',
+    shopping: 'Shopping',
+    profile: 'Profile',
+    admin: 'Admin',
+    dashboard: 'Dashboard',
+    users: 'Users',
+    homes: 'Homes',
+    mail: 'Mail',
+    security: 'Security',
+    notifications: 'Notifications',
+    system: 'System',
+    logs: 'Logs',
+    backupRestore: 'Backup/Restore',
+    categories: 'Categories',
+    locations: 'Locations',
+    manualAdd: 'Add manually',
+    scanBarcode: 'Scan barcode',
+    productName: 'Product name',
+    barcode: 'Barcode',
+    brand: 'Brand',
+    category: 'Category',
+    location: 'Location',
+    quantity: 'Quantity',
+    unit: 'Unit',
+    expiresAt: 'Expiry date',
+    minQuantity: 'Minimum stock',
+    notes: 'Notes',
+    save: 'Save',
+    cancel: 'Cancel',
+    ok: 'good',
+    soon: 'expires soon',
+    expired: 'expired',
+    addToShopping: 'Add to shopping',
+    recipes: 'Recipes',
+    onboardingTitle: 'Welcome to NexaPantry',
+    onboardingDone: 'Finish tutorial',
+    skip: 'Skip',
+    createHome: 'Create home',
+    joinHome: 'Join home by code',
+    joinCode: 'Join code',
+    smtpHost: 'SMTP host',
+    smtpPort: 'SMTP port',
+    smtpUser: 'SMTP user',
+    smtpPassword: 'SMTP password',
+    senderAddress: 'Sender address',
+    senderName: 'Sender name',
+    testMail: 'Send test mail',
+    light: 'Light',
+    dark: 'Dark',
+    systemTheme: 'System'
+  }
+};
+