- Reduce PyInstaller binary libraries to eliminate segfaults:
  * Remove 25+ unnecessary X11/GL libraries from build.py
  * Keep only essential libraries: libxcb.so.1 and libX11.so.6
  * Update mbetter_discovery_linux.spec with minimal libraries
  * Remove qt.conf and platforms directory copying for self-contained binary

- Clean up codebase by removing unused files:
  * Remove qt6_player.py (unused duplicate implementation)
  * Remove temp_js.js and extract_js.py (utility files)
  * Remove hook-pyqt6.py and runtime_hook.py (disabled/unnecessary)

- Enhance build scripts:
  * Update MbetterClient_wrapper.sh with video safety measures
  * Update clean.sh to preserve .exe files while removing artifacts
  * Add comprehensive error handling for virtualized environments

- Restore important assets:
  * Restore dist/MBetterDiscovery.exe from git repository

Result: Self-contained binary with reduced library conflicts, better compatibility across Linux distributions and virtualized environments.