feat(i18n): add translations for settings tabs

- Add settings.events.* keys for Event Creation settings
- Add settings.imageSecurity.* keys for Image Protection settings
- Add settings.moderation.* keys for Word Filter/Moderation settings
- Add cssTemplates.* keys for Custom CSS Templates
- All settings tabs now have proper i18n support

frontend/src/i18n/locales/en.json

@@ -737,6 +737,80 @@
       "failed": "Failed",
       "lastUpdate": "Last update"
     },
+    "events": {
+      "title": "Event Creation",
+      "requiredFields": "Required Fields",
+      "requiredFieldsDescription": "Configure which contact fields are required when creating new events.",
+      "requireCustomerName": "Require customer name",
+      "requireCustomerNameHelp": "Customer name must be provided for new events",
+      "requireCustomerEmail": "Require customer email",
+      "requireCustomerEmailHelp": "Customer email must be provided for new events",
+      "customerEmailWarning": "Required for sending gallery invitations",
+      "requireAdminEmail": "Require admin email",
+      "requireAdminEmailHelp": "Admin email must be provided for new events",
+      "adminEmailWarning": "Required for receiving event notifications",
+      "saveSettings": "Save Event Settings",
+      "noteTitle": "Note",
+      "noteText": "These settings only affect new event creation. Existing events are not affected. Default behavior requires all fields."
+    },
+    "imageSecurity": {
+      "title": "Image Protection",
+      "saveSuccess": "Image security settings saved",
+      "saveError": "Failed to save settings",
+      "loadError": "Failed to load image security settings",
+      "defaultProtection": "Default Protection Settings",
+      "defaultProtectionHelp": "These settings apply to all new events. Individual events can override these defaults.",
+      "protectionLevel": "Default Protection Level",
+      "imageQuality": "Default Image Quality",
+      "fragmentationLevel": "Fragmentation Level",
+      "enableDevtools": "Enable DevTools detection by default",
+      "enableCanvas": "Enable canvas rendering by default (advanced protection)",
+      "rateLimiting": "Rate Limiting",
+      "rateLimitingHelp": "Limit how many images can be requested to prevent scraping.",
+      "requestsPerMinute": "Requests per minute",
+      "requestsPer5Minutes": "Requests per 5 min",
+      "requestsPerHour": "Requests per hour",
+      "securityMonitoring": "Security Monitoring",
+      "suspiciousThreshold": "Suspicious activity threshold",
+      "autoBlockThreshold": "Auto-block threshold",
+      "enableMonitoring": "Enable security monitoring",
+      "blockSuspiciousIps": "Automatically block suspicious IPs",
+      "logEvents": "Log security events to database",
+      "infoTitle": "About Image Protection",
+      "infoText": "These protection features help prevent casual downloading and copying but cannot block all methods. Determined users may still find ways to capture images. Consider using watermarks and legal agreements for comprehensive protection."
+    },
+    "moderation": {
+      "title": "Moderation",
+      "wordFilters": "Word Filters",
+      "description": "Manage words that should be filtered or blocked in comments",
+      "addFilter": "Add New Filter",
+      "enterWord": "Enter word to filter",
+      "searchFilters": "Search filters...",
+      "filterAdded": "Word filter added successfully",
+      "filterExists": "This word filter already exists",
+      "addError": "Failed to add word filter",
+      "filterUpdated": "Word filter updated successfully",
+      "updateError": "Failed to update word filter",
+      "filterDeleted": "Word filter deleted successfully",
+      "deleteError": "Failed to delete word filter",
+      "wordRequired": "Please enter a word to filter",
+      "confirmDelete": "Are you sure you want to delete this word filter?",
+      "loading": "Loading word filters...",
+      "noMatchingFilters": "No matching filters found",
+      "noFilters": "No word filters configured yet",
+      "severityLow": "Low",
+      "severityModerate": "Moderate",
+      "severityHigh": "High",
+      "severityBlock": "Block",
+      "severityLevels": "Severity Levels",
+      "lowDescription": "Word is flagged for review but not automatically blocked",
+      "moderateDescription": "Comment requires manual approval before being visible",
+      "highDescription": "Comment is automatically hidden and requires admin review",
+      "blockDescription": "Comment is rejected immediately and cannot be submitted"
+    },
+    "styling": {
+      "title": "Custom CSS"
+    },
     "analytics": {
       "title": "Analytics",
       "umamiIntegration": "Umami Analytics Integration",
@@ -1731,6 +1805,27 @@
       "testEmailFailed": "Connection test failed"
     }
   },
+  "cssTemplates": {
+    "title": "Custom CSS Templates",
+    "template": "Template",
+    "templateName": "Template Name",
+    "enableTemplate": "Enable this template",
+    "enableHint": "Enabled templates can be selected when creating events",
+    "cssContent": "CSS Content",
+    "cssHint": "Use .gallery-page to scope styles to the gallery. Available variables: --gallery-bg, --gallery-text, --gallery-accent",
+    "securityNotice": "Security Notice",
+    "securityText": "CSS is sanitized to prevent malicious code. External URLs, @import, and JavaScript expressions are blocked.",
+    "resetToDefault": "Reset to Default",
+    "resetConfirm": "Reset this template to the default? Your changes will be lost.",
+    "unsavedChanges": "Unsaved changes",
+    "saveTemplate": "Save Template",
+    "lastUpdated": "Last updated",
+    "saved": "Template saved successfully",
+    "saveFailed": "Failed to save template",
+    "sanitizationWarning": "Some CSS patterns were blocked for security",
+    "reset": "Template reset to default",
+    "resetFailed": "Failed to reset template"
+  },
   "maintenance": {
     "title": "System Maintenance",
     "message": "We're currently performing scheduled maintenance to improve our service. We'll be back online shortly.",