Initial commit - Project start (July 17, 2025)

Original: feat: enhance security logging and ensure rate limit blocks are properly tracked

- Add comprehensive logging for rate limit blocks with full request details
  - IP address (with proper proxy detection), user agent, headers, timestamps
  - Rate limit info (current count, limit, remaining, reset time)
  - Separate tracking for auth vs general endpoints

- Enhance authentication failure logging
  - JWT validation failures with detailed error info
  - Admin auth attempts without token
  - Failed token validation with user context
  - All events include IP, path, method, user agent

- Improve Winston logger configuration for production
  - Add automatic log rotation (10MB errors, 50MB combined)
  - Create separate security.log for auth/rate limit events
  - Ensure logs directory exists automatically
  - Add structured JSON format for log aggregation
  - Support container logging with LOG_TO_CONSOLE env var

- Create comprehensive documentation
  - Security logging guide with examples
  - Monitoring recommendations
  - Configuration reference

- Add test script to verify logging functionality

All rate limit settings remain configurable via admin panel:
- Window duration, max requests, auth limits
- Skip authenticated requests option
- Public endpoints only option

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

frontend/src/components/common/LanguageSelector.tsx

@@ -0,0 +1,54 @@
+import React from 'react';
+import { useTranslation } from 'react-i18next';
+import { Globe } from 'lucide-react';
+
+const languages = [
+  { code: 'en', name: 'English', flag: '🇬🇧' },
+  { code: 'de', name: 'Deutsch', flag: '🇩🇪' },
+];
+
+export const LanguageSelector: React.FC = () => {
+  const { i18n } = useTranslation();
+  const [isOpen, setIsOpen] = React.useState(false);
+
+  const currentLanguage = languages.find(lang => lang.code === i18n.language) || languages[0];
+
+  const handleLanguageChange = (languageCode: string) => {
+    i18n.changeLanguage(languageCode);
+    setIsOpen(false);
+  };
+
+  return (
+    <div className="relative">
+      <button
+        onClick={() => setIsOpen(!isOpen)}
+        className="flex items-center gap-2 px-3 py-2 text-sm font-medium text-neutral-700 bg-white border border-neutral-300 rounded-lg hover:bg-neutral-50 focus:outline-none focus:ring-2 focus:ring-primary-500"
+      >
+        <Globe className="w-4 h-4" />
+        <span>{currentLanguage.flag}</span>
+        <span>{currentLanguage.name}</span>
+      </button>
+
+      {isOpen && (
+        <div className="absolute right-0 mt-2 w-48 bg-white rounded-lg shadow-lg border border-neutral-200 py-1 z-50">
+          {languages.map((language) => (
+            <button
+              key={language.code}
+              onClick={() => handleLanguageChange(language.code)}
+              className={`w-full text-left px-4 py-2 text-sm hover:bg-neutral-50 flex items-center gap-3 ${
+                language.code === i18n.language
+                  ? 'text-primary-600 bg-primary-50'
+                  : 'text-neutral-700'
+              }`}
+            >
+              <span className="text-lg">{language.flag}</span>
+              <span>{language.name}</span>
+            </button>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+};
+
+LanguageSelector.displayName = 'LanguageSelector';