[4.0.4] Bug Fixes

Fixed

• Windows Setup Launch & Permission Resolution (NyLuna.exe):

  • Resolved Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item. error when launching the client upon setup completion.
  • Added automatic removal of NTFS :Zone.Identifier Alternate Data Streams (Mark of the Web) from internet-downloaded binaries to prevent Windows Attachment Manager / SmartScreen blocks.
  • Implemented interactive UAC de-elevation via explorer.exe when installer runs with Administrator privileges, ensuring NyLuna.exe executes under the interactive user token (Medium Integrity).
  • Added Windows Defender real-time scanning verification loop to prevent launch failures during file inspection locks.
  • Fixed _copy_with_progress to explicitly grant execute (0o755) and standard read/write permissions rather than copying restrictive PyInstaller temporary attributes via shutil.copystat.

• PyInstaller Temporary Directory Cleanup (_MEIxxxxxx):

  • Eliminated the popup warning dialog Failed to remove temporary directory: C:\Users\...\AppData\Local\Temp\_MEIxxxxxx on installer exit.
  • Replaced PIL Image.open direct path loading with in-memory byte buffers (io.BytesIO) to guarantee zero open file handles to _MEIPASS\logo.png.
  • Added explicit Win32 GDI icon handle cleanup (root.iconbitmap("")) on window closure.
  • Isolated all subprocess invocations (powershell, taskkill, tasklist) with cwd=target_dir, stdin=DEVNULL, and close_fds=True to prevent handle inheritance.
  • Replaced the race-prone 220ms timer with an event-driven _on_install_completed teardown synchronization callback.

Added

• Windows Single-Instance & Foreground Window Restoration:
  • Implemented Win32 named mutex (Local\NyLuna_SingleInstance_Mutex) in the Slint Rust frontend to restore and bring existing launcher windows to the foreground on duplicate launches on Windows, harmonizing with POSIX domain socket handling on Linux.
• Installer Test Suite:
  • Added unit test coverage for executable unblocking (unblock_file) and cross-integrity process launch dispatching (launch_installed_app) in tests/unit/test_web_installer_assets.py.