Implement dynamic language system with automatic detection

- Add getAvailableLanguages() method to scan lang directory automatically
- Add getNativeLanguageName() method for proper language display names
- Enhance SimpleTemplate engine to support array iteration with {{#array}} syntax
- Update header template to use dynamic language dropdown with native names
- Add German (de.php) and French (fr.php) language files as examples
- Fix search input text color to use black text for better visibility
- Languages now appear automatically when added to engine/lang/ without code changes

engine/core/class/CodePressCMS.php

@@ -73,6 +73,65 @@ class CodePressCMS {
         return file_exists($defaultLangFile) ? include $defaultLangFile : [];
     }
     
+
+    
+    /**
+     * Get all available languages from lang directory
+     * 
+     * @return array Available languages with their codes and names
+     */
+    private function getAvailableLanguages() {
+        $langDir = __DIR__ . '/../../lang/';
+        $languages = [];
+        
+        if (!is_dir($langDir)) {
+            return $languages;
+        }
+        
+        $files = scandir($langDir);
+        foreach ($files as $file) {
+            if (preg_match('/^([a-z]{2})\.php$/', $file, $matches)) {
+                $langCode = $matches[1];
+                $langFile = $langDir . $file;
+                
+                if (file_exists($langFile)) {
+                    $translations = include $langFile;
+                    $languages[$langCode] = [
+                        'code' => $langCode,
+                        'name' => $translations['site_title'] ?? strtoupper($langCode),
+                        'native_name' => $this->getNativeLanguageName($langCode)
+                    ];
+                }
+            }
+        }
+        
+        return $languages;
+    }
+    
+    /**
+     * Get native language name for language code
+     * 
+     * @param string $langCode Language code
+     * @return string Native language name
+     */
+    private function getNativeLanguageName($langCode) {
+        $names = [
+            'nl' => 'Nederlands',
+            'en' => 'English',
+            'fr' => 'Français',
+            'de' => 'Deutsch',
+            'es' => 'Español',
+            'it' => 'Italiano',
+            'pt' => 'Português',
+            'ru' => 'Русский',
+            'zh' => '中文',
+            'ja' => '日本語',
+            'ar' => 'العربية'
+        ];
+        
+        return $names[$langCode] ?? strtoupper($langCode);
+    }
+    
     /**
      * Get translated text
      * 
@@ -885,7 +944,10 @@ class CodePressCMS {
             // Language
             'current_lang' => $this->currentLanguage,
             'current_lang_upper' => strtoupper($this->currentLanguage),
-            'available_langs' => $this->config['language']['available'] ?? ['nl', 'en'],
+            'available_langs' => array_map(function($lang) {
+                $lang['is_current'] = $lang['code'] === $this->currentLanguage;
+                return $lang;
+            }, $this->getAvailableLanguages()),
             // Translations
             't_home' => $this->t('home'),
             't_search' => $this->t('search'),

engine/core/class/SimpleTemplate.php

@@ -39,8 +39,42 @@ class SimpleTemplate {
         
         // Handle conditional blocks
         foreach ($this->data as $key => $value) {
-            if (is_array($value) || (is_string($value) && !empty($value))) {
-                // Handle {{#key}}...{{/key}} blocks
+            if (is_array($value)) {
+                // Handle {{#key}}...{{/key}} blocks for arrays (iteration)
+                $pattern = '/{{#' . preg_quote($key, '/') . '}}(.*?){{\/' . preg_quote($key, '/') . '}}/s';
+                if (preg_match($pattern, $template, $matches)) {
+                    $blockTemplate = $matches[1];
+                    $replacement = '';
+                    
+                    foreach ($value as $item) {
+                        if (is_array($item)) {
+                            // Create a temporary template instance for nested data
+                            $tempTemplate = new self();
+                            $tempTemplate->data = $item;
+                            $replacement .= $tempTemplate->renderTemplate($blockTemplate);
+                        } else {
+                            // Simple array, replace {{.}} with the item value
+                            $itemBlock = str_replace('{{.}}', htmlspecialchars($item, ENT_QUOTES, 'UTF-8'), $blockTemplate);
+                            $replacement .= $itemBlock;
+                        }
+                    }
+                    
+                    $template = preg_replace($pattern, $replacement, $template);
+                }
+                
+                // Handle {{^key}}...{{/key}} blocks (negative condition for empty arrays)
+                $pattern = '/{{\^' . preg_quote($key, '/') . '}}(.*?){{\/' . preg_quote($key, '/') . '}}/s';
+                if (empty($value)) {
+                    // Show the content if array is empty
+                    if (preg_match($pattern, $template, $matches)) {
+                        $template = preg_replace($pattern, $matches[1], $template);
+                    }
+                } else {
+                    // Remove the content if array is not empty
+                    $template = preg_replace($pattern, '', $template);
+                }
+            } elseif ((is_string($value) && !empty($value)) || (is_bool($value) && $value === true)) {
+                // Handle {{#key}}...{{/key}} blocks for truthy values
                 $pattern = '/{{#' . preg_quote($key, '/') . '}}(.*?){{\/' . preg_quote($key, '/') . '}}/s';
                 if (preg_match($pattern, $template, $matches)) {
                     $replacement = $matches[1];