fix: consider all mounts for listDirectory

src/lib/seallib/vfs.cpp

@@ -3,6 +3,7 @@
 #include <algorithm>
 #include <cstring>
 #include <cctype>
+#include <set>
 
 using namespace seallib;
 
@@ -155,11 +156,22 @@ VFSResult VirtualFileSystem::createDirectory(const std::string& path)
 std::vector<std::string> VirtualFileSystem::listDirectory(const std::string& path) const
 {
     std::shared_lock lock(_mutex);
-    std::string relativePath;
-    const MountPoint* mount = findBestMount(path, relativePath);
+    std::string searchPath = trimPathSeparators(normalizePath(path));
 
-    if (!mount) return {};
-    return mount->provider->listDirectory(relativePath);
+    std::set<std::string> mergedFiles;
+
+    for (const auto& mount : _mounts)
+    {
+        std::string relativePath;
+        if (getRelativePath(mount, searchPath, relativePath))
+        {
+            auto files = mount.provider->listDirectory(relativePath);
+            for (const auto& f : files)
+                mergedFiles.insert(f);
+        }
+    }
+
+    return {mergedFiles.begin(), mergedFiles.end()};
 }
 
 std::string VirtualFileSystem::normalizePath(const std::string& path) const