fix : suppression article — permissions répertoire et gestion d'erreur (v1.6.10)

- mkArticleDir() crée les répertoires avec chmod 0775 explicite (bypass umask)
- delete() retourne bool et détecte l'échec sans reconstruire les index
- removeDir() supprime les warnings PHP (@unlink, @rmdir, @scandir)
- post_view.php affiche un message d'erreur si delete_failed=1
- index.php redirige vers l'article avec ?delete_failed=1 si échec

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/ArticleManager.php

@@ -105,8 +105,8 @@ class ArticleManager
         $publishedAt = $publishedAt !== '' ? $publishedAt : $now;
 
         $dir = $this->dataDir . '/' . $uuid;
-        mkdir($dir, 0755, true);
-        mkdir($dir . '/files', 0755, true);
+        $this->mkArticleDir($dir);
+        $this->mkArticleDir($dir . '/files');
 
         $meta = [
             'uuid'            => $uuid,
@@ -155,7 +155,7 @@ class ArticleManager
         if ($contentChanged || $titleChanged) {
             $revDir = $this->dataDir . '/' . $uuid . '/revisions';
             if (!is_dir($revDir)) {
-                mkdir($revDir, 0755, true);
+                $this->mkArticleDir($revDir);
             }
             $n       = count($revisions) + 1;
             $revFile = sprintf('%s/%04d.md', $revDir, $n);
@@ -482,7 +482,7 @@ class ArticleManager
         $isImage  = str_starts_with($mime, 'image/');
         $filesDir = $this->dataDir . '/' . $uuid . '/files';
         if (!is_dir($filesDir)) {
-            mkdir($filesDir, 0755, true);
+            $this->mkArticleDir($filesDir);
         }
 
         if ($isImage) {
@@ -806,10 +806,10 @@ class ArticleManager
         $this->git?->commit("featured: " . ($meta['title'] ?? $uuid) . " (" . ($featured ? 'on' : 'off') . ")");
     }
 
-    public function delete(string $uuid): void
+    public function delete(string $uuid): bool
     {
         if (!$this->isValidUuid($uuid)) {
-            return;
+            return false;
         }
         $dir = $this->dataDir . '/' . $uuid;
         $title = null;
@@ -823,9 +823,13 @@ class ArticleManager
             @unlink($this->slugIndexPath());
             $this->removeDir($dir);
         }
+        if (is_dir($dir)) {
+            return false;
+        }
         $this->rebuildSearchIndex();
         $this->rebuildBacklinksCache();
         $this->git?->commit("delete: " . ($title ?? $uuid));
+        return true;
     }
 
     // ------------------------------------------------------------------ //
@@ -1110,7 +1114,7 @@ class ArticleManager
         }
         $dir = $this->dataDir . '/' . $uuid . '/files';
         if (!is_dir($dir)) {
-            mkdir($dir, 0755, true);
+            $this->mkArticleDir($dir);
         }
 
         $mime = mime_content_type($uploadedFile['tmp_name']) ?: 'application/octet-stream';
@@ -1370,13 +1374,19 @@ class ArticleManager
      */
     private function removeDir(string $dir): void
     {
-        foreach (scandir($dir) as $entry) {
+        foreach (@scandir($dir) ?: [] as $entry) {
             if ($entry === '.' || $entry === '..') {
                 continue;
             }
             $path = $dir . '/' . $entry;
-            is_dir($path) ? $this->removeDir($path) : unlink($path);
+            is_dir($path) ? $this->removeDir($path) : @unlink($path);
         }
-        rmdir($dir);
+        @rmdir($dir);
+    }
+
+    private function mkArticleDir(string $path): void
+    {
+        mkdir($path, 0777, true);
+        chmod($path, 0775);
     }
 }