diff --git a/includes/DeltaConverter.php b/includes/DeltaConverter.php
index 2300d8d..296023a 100644
--- a/includes/DeltaConverter.php
+++ b/includes/DeltaConverter.php
@@ -2,13 +2,40 @@
 
 class DeltaConverter {
     private static $blockAttrs = ['align', 'header', 'blockquote', 'code-block', 'list'];
-    private static $inlineAttrs = ['bold', 'italic', 'underline', 'color', 'background', 'link', 'font', 'script'];
+    private static $inlineAttrs = ['bold', 'italic', 'underline', 'strike', 'color', 'background', 'link', 'font', 'script'];
     
     public static function toHtml($content) {
         if (empty($content)) return '';
         
         // Si le contenu est déjà en HTML
         if (is_string($content) && !self::isJson($content)) {
+            // Convertir les classes ql-align-* en styles d'alignement
+            $content = preg_replace_callback(
+                '/class="ql-align-(justify|center|right)"/',
+                function($matches) {
+                    return 'style="text-align: ' . $matches[1] . ' !important"';
+                },
+                $content
+            );
+            
+            // Convertir les classes ql-font-* en classes de police
+            $content = preg_replace_callback(
+                '/class="ql-font-(serif|monospace|sans-serif)"/',
+                function($matches) {
+                    switch($matches[1]) {
+                        case 'serif':
+                            return 'class="font-serif"';
+                        case 'monospace':
+                            return 'class="font-mono"';
+                        case 'sans-serif':
+                            return 'class="font-sans"';
+                        default:
+                            return '';
+                    }
+                },
+                $content
+            );
+            
             return self::cleanImageUrls($content);
         }
         
@@ -37,10 +64,17 @@ class DeltaConverter {
                 // Si c'est un saut de ligne, on finalise le bloc
                 if ($text === "\n") {
                     // Vérifier les attributs de bloc pour ce saut de ligne
-                    foreach ($attrs as $key => $value) {
-                        if (in_array($key, self::$blockAttrs)) {
-                            $currentBlock['attrs'][$key] = $value;
-                        }
+                    if (!empty($attrs['align'])) {
+                        $currentBlock['attrs']['text-align'] = $attrs['align'];
+                    }
+                    if (!empty($attrs['header'])) {
+                        $currentBlock['attrs']['header'] = $attrs['header'];
+                    }
+                    if (!empty($attrs['blockquote'])) {
+                        $currentBlock['attrs']['blockquote'] = true;
+                    }
+                    if (!empty($attrs['code-block'])) {
+                        $currentBlock['attrs']['code-block'] = true;
                     }
                     
                     // Finaliser le bloc courant
@@ -111,16 +145,12 @@ class DeltaConverter {
             $tag = 'blockquote';
         } elseif (!empty($block['attrs']['code-block'])) {
             $tag = 'pre';
+            $classes[] = 'code-block';
         }
         
         // Appliquer l'alignement au niveau du bloc
-        if (!empty($block['attrs']['align'])) {
-            $styles[] = "text-align: " . $block['attrs']['align'] . " !important";
-        }
-        
-        // Appliquer la police au niveau du bloc si présente
-        if (!empty($block['attrs']['font'])) {
-            $classes[] = 'font-' . strtolower($block['attrs']['font']);
+        if (!empty($block['attrs']['text-align'])) {
+            $styles[] = "text-align: " . $block['attrs']['text-align'] . " !important";
         }
         
         // Construire le contenu avec les attributs inline
@@ -153,10 +183,10 @@ class DeltaConverter {
         // Construire les attributs HTML finaux
         $attributes = '';
         if (!empty($styles)) {
-            $attributes .= ' style="' . implode('; ', $styles) . '"';
+            $attributes .= ' style="' . implode('; ', array_unique($styles)) . '"';
         }
         if (!empty($classes)) {
-            $attributes .= ' class="' . implode(' ', $classes) . '"';
+            $attributes .= ' class="' . implode(' ', array_unique($classes)) . '"';
         }
         
         return "<$tag$attributes>$content</$tag>";
@@ -174,17 +204,30 @@ class DeltaConverter {
         if (!empty($attrs['underline'])) {
             $text = "<u>$text</u>";
         }
+        if (!empty($attrs['strike'])) {
+            $text = "<s>$text</s>";
+        }
         if (!empty($attrs['color'])) {
-            $text = "<span style=\"color: {$attrs['color']}\">$text</span>";
+            $text = "<span style=\"color: {$attrs['color']} !important\">$text</span>";
         }
         if (!empty($attrs['background'])) {
-            $text = "<span style=\"background-color: {$attrs['background']}\">$text</span>";
+            $text = "<span style=\"background-color: {$attrs['background']} !important\">$text</span>";
         }
         if (!empty($attrs['link'])) {
             $text = "<a href=\"{$attrs['link']}\" target=\"_blank\">$text</a>";
         }
         if (!empty($attrs['font'])) {
-            $text = "<span class=\"font-" . strtolower($attrs['font']) . "\">$text</span>";
+            switch($attrs['font']) {
+                case 'serif':
+                    $text = "<span class=\"font-serif\">$text</span>";
+                    break;
+                case 'monospace':
+                    $text = "<span class=\"font-mono\">$text</span>";
+                    break;
+                case 'sans-serif':
+                    $text = "<span class=\"font-sans\">$text</span>";
+                    break;
+            }
         }
         if (!empty($attrs['script'])) {
             if ($attrs['script'] === 'super') $text = "<sup>$text</sup>";