🔧 Cache içinde boş kalan thumbnail klasörlerini de temizle.

server/server.js

@@ -152,21 +152,6 @@ function removeThumbnailsForPath(relPath) {
   const normalized = sanitizeRelative(relPath);
   if (!normalized) return;
 
-  const directDirs = [
-    path.join(VIDEO_THUMB_ROOT, normalized),
-    path.join(IMAGE_THUMB_ROOT, normalized)
-  ];
-
-  for (const target of directDirs) {
-    try {
-      if (fs.existsSync(target) && fs.lstatSync(target).isDirectory()) {
-        fs.rmSync(target, { recursive: true, force: true });
-      }
-    } catch (err) {
-      console.warn(`⚠️ Thumbnail klasörü silinemedi (${target}): ${err.message}`);
-    }
-  }
-
   const parsed = path.parse(normalized);
   const candidates = [
     path.join(VIDEO_THUMB_ROOT, parsed.dir, `${parsed.name}.jpg`),
@@ -180,6 +165,31 @@ function removeThumbnailsForPath(relPath) {
       console.warn(`⚠️ Thumbnail silinemedi (${candidate}): ${err.message}`);
     }
   }
+
+  const potentialDirs = [
+    path.join(VIDEO_THUMB_ROOT, parsed.dir),
+    path.join(IMAGE_THUMB_ROOT, parsed.dir)
+  ];
+
+  for (const dirPath of potentialDirs) {
+    cleanupEmptyDirs(dirPath);
+  }
+}
+
+function cleanupEmptyDirs(startDir) {
+  let dir = startDir;
+  while (
+    dir &&
+    dir.startsWith(THUMBNAIL_DIR) &&
+    fs.existsSync(dir) &&
+    fs.lstatSync(dir).isDirectory()
+  ) {
+    const entries = fs.readdirSync(dir);
+    if (entries.length > 0) break;
+    fs.rmdirSync(dir);
+    dir = path.dirname(dir);
+    if (dir === THUMBNAIL_DIR || dir === path.dirname(THUMBNAIL_DIR)) break;
+  }
 }
 
 function resolveThumbnailAbsolute(relThumbPath) {