Fixes #6514 -- Hide all dot-prefixed files, not just our protected directories.

src/Controller/Api/Stations/Files/ListAction.php

@@ -205,7 +205,7 @@ final class ListAction implements SingleActionInterface
                 $files = $fs->listContents($currentDir, false)->filter(
                     fn(StorageAttributes $attributes) => !(
                         $currentDir === ''
-                        && StationFilesystems::isProtectedDir($attributes->path())
+                        && StationFilesystems::isDotFile($attributes->path())
                     )
                 );
             }

src/Controller/Api/Stations/Files/ListDirectoriesAction.php

@@ -31,7 +31,7 @@ final class ListDirectoriesAction implements SingleActionInterface
 
         $directoriesRaw = $fsMedia->listContents($currentDir, false)->filter(
             fn(StorageAttributes $attrs) => $attrs->isDir()
-                && !StationFilesystems::isProtectedDir($attrs->path())
+                && !StationFilesystems::isDotFile($attrs->path())
         )->sortByPath();
 
         $directories = [];

src/Controller/Api/Stations/Playlists/GetApplyToAction.php

@@ -35,7 +35,7 @@ final class GetApplyToAction implements SingleActionInterface
 
         // Iterate all directories to show them as selectable.
         $fsIterator = $fsMedia->listContents('/', true)->filter(
-            fn(StorageAttributes $attrs) => $attrs->isDir() && !StationFilesystems::isProtectedDir($attrs->path())
+            fn(StorageAttributes $attrs) => $attrs->isDir() && !StationFilesystems::isDotFile($attrs->path())
         )->sortByPath();
 
         $directories = [

src/Flysystem/StationFilesystems.php

@@ -98,10 +98,11 @@ final class StationFilesystems
         return new LocalFilesystem(new LocalFilesystemAdapter($path));
     }
 
-    public static function isProtectedDir(string $path): bool
+    public static function isDotFile(string $path): bool
     {
-        foreach (self::PROTECTED_DIRS as $protectedDir) {
-            if (str_starts_with($path, $protectedDir)) {
+        $pathParts = explode('/', $path);
+        foreach ($pathParts as $part) {
+            if (str_starts_with($part, '.')) {
                 return true;
             }
         }

src/Sync/Task/CheckMediaTask.php

@@ -92,7 +92,7 @@ final class CheckMediaTask extends AbstractTask
 
         try {
             $fsIterator = $fs->listContents('/', true)->filter(
-                fn(StorageAttributes $attrs) => $attrs->isFile() && !StationFilesystems::isProtectedDir($attrs->path())
+                fn(StorageAttributes $attrs) => $attrs->isFile() && !StationFilesystems::isDotFile($attrs->path())
             );
         } catch (FilesystemException $e) {
             $this->logger->error(