- Introduce nomarchy.configOverrides option to map a user directory to ~/.config
- Implement automatic merging of upstream defaults and user overrides
- Use lib.mkDefault for all upstream mappings to allow granular HM overrides
- Update installer template with usage examples
- Update flake.nix with 25.11 release and core inputs
- Add dedicated modules for audio (Pipewire), bluetooth, and networking
- Update GEMINI.md with the new Modular Merging Architecture blueprint
- Configure graphical installer ISO and test VM outputs