fix: email resend language and password display issues

- Added missing translation for admin.activities.email_resent in both EN and DE
- Fixed language detection in resend email to use email processor's priority system
- Fixed password security message showing German text in English emails
- Updated email processor to handle password placeholder and format dates properly
- Dates are now formatted according to language and system settings
- Password security message now displays in the correct language based on recipient

backend/src/routes/adminEvents.js

@@ -578,41 +578,39 @@ router.post('/:id/resend-email', adminAuth, async (req, res) => {
       return res.status(404).json({ error: 'Event not found' });
     }
     
-    // Get the language preference
-    let language = 'en';
-    try {
-      // First check app_settings for general_default_language
-      const langSetting = await db('app_settings')
-        .where('setting_key', 'general_default_language')
-        .first();
-      
-      if (langSetting && langSetting.setting_value) {
-        language = langSetting.setting_value;
-      }
-    } catch (err) {
-      console.warn('Could not fetch language setting:', err);
+    // The email processor will determine the language based on:
+    // 1. Event language setting
+    // 2. App settings general_default_language  
+    // 3. Email config default language
+    // 4. Domain-based detection
+    // So we don't need to determine it here
+    
+    // For resending creation email, we need the actual password
+    // First, try to get it from the request body if provided
+    let galleryPassword = req.body.password;
+    
+    // If no password provided, we can't decrypt the existing one
+    // So we'll show a security message
+    if (!galleryPassword) {
+      // We'll let the email processor determine the language for the security message
+      galleryPassword = '{{password_security_message}}';
     }
     
-    // Format dates based on language
+    // Format dates in a neutral format - the email processor will localize them
     const eventDate = new Date(event.event_date);
     const expiryDate = new Date(event.expires_at);
-    const dateLocale = language === 'de' ? 'de-DE' : 'en-US';
-    
-    // Prepare password text based on language
-    const passwordText = language === 'de' 
-      ? '(Aus Sicherheitsgründen nicht angezeigt)' 
-      : '(Not shown for security reasons)';
     
     // Queue the email
     await queueEmail(id, event.host_email, 'gallery_created', {
       host_name: event.host_name || event.host_email.split('@')[0],
       event_name: event.event_name,
-      event_date: eventDate.toLocaleDateString(dateLocale),
+      event_date: eventDate.toISOString().split('T')[0], // YYYY-MM-DD format
       gallery_link: event.share_link,
-      gallery_password: passwordText,
-      expiry_date: expiryDate.toLocaleDateString(dateLocale),
+      gallery_password: galleryPassword,
+      expiry_date: expiryDate.toISOString().split('T')[0], // YYYY-MM-DD format
       welcome_message: event.welcome_message || '',
-      eventId: id
+      eventId: id,
+      isResend: true // Flag to indicate this is a resend
     });
     
     // Log the activity using the proper schema

backend/src/services/emailProcessor.js

@@ -109,6 +109,9 @@ async function getRecipientLanguage(email, eventId = null) {
 
 // Process email template with variables
 async function processTemplate(template, variables, language = 'en') {
+  // Import date formatter
+  const { formatDate } = require('../utils/dateFormatter');
+  
   // Get the appropriate language fields
   const subjectField = language === 'de' ? 'subject_de' : 'subject_en';
   const htmlField = language === 'de' ? 'body_html_de' : 'body_html_en';
@@ -118,6 +121,27 @@ async function processTemplate(template, variables, language = 'en') {
   let subject = template[subjectField] || template.subject || '';
   let htmlBody = template[htmlField] || template.body_html || '';
   let textBody = template[textField] || template.body_text || '';
+  
+  // Process variables before template compilation
+  const processedVariables = { ...variables };
+  
+  // Handle password security message
+  if (processedVariables.gallery_password === '{{password_security_message}}') {
+    processedVariables.gallery_password = language === 'de' 
+      ? '(Aus Sicherheitsgründen nicht angezeigt)' 
+      : '(Not shown for security reasons)';
+  }
+  
+  // Format dates if they exist
+  if (processedVariables.event_date) {
+    processedVariables.event_date = await formatDate(processedVariables.event_date, language);
+  }
+  if (processedVariables.expiry_date) {
+    processedVariables.expiry_date = await formatDate(processedVariables.expiry_date, language);
+  }
+  if (processedVariables.archive_date) {
+    processedVariables.archive_date = await formatDate(processedVariables.archive_date, language);
+  }
 
   // Get branding settings for logo
   let logoUrl = '';
@@ -156,10 +180,10 @@ async function processTemplate(template, variables, language = 'en') {
   const htmlTemplate = Handlebars.compile(htmlBody);
   const textTemplate = Handlebars.compile(textBody);
   
-  // Process templates with variables
-  subject = subjectTemplate(variables);
-  htmlBody = htmlTemplate(variables);
-  textBody = textTemplate(variables);
+  // Process templates with processedVariables (includes formatted dates and security messages)
+  subject = subjectTemplate(processedVariables);
+  htmlBody = htmlTemplate(processedVariables);
+  textBody = textTemplate(processedVariables);
 
   // Wrap HTML body in styled template
   const styledHtmlBody = `

frontend/src/i18n/locales/de.json

@@ -715,6 +715,7 @@
       "settings_updated": "Einstellungen aktualisiert",
       "event_updated": "Veranstaltung aktualisiert: {{eventName}}",
       "event_deleted": "Veranstaltung gelöscht: {{eventName}}",
+      "email_resent": "Erstellungs-E-Mail erneut gesendet für: {{eventName}}",
       "category_created": "Kategorie erstellt: {{categoryName}}",
       "category_updated": "Kategorie aktualisiert: {{categoryName}}",
       "category_deleted": "Kategorie gelöscht: {{categoryName}}",

frontend/src/i18n/locales/en.json

@@ -766,6 +766,7 @@
       "settings_updated": "Settings updated",
       "event_updated": "Event updated: {{eventName}}",
       "event_deleted": "Event deleted: {{eventName}}",
+      "email_resent": "Creation email resent for: {{eventName}}",
       "category_created": "Category created: {{categoryName}}",
       "category_updated": "Category updated: {{categoryName}}",
       "category_deleted": "Category deleted: {{categoryName}}",