- niri: remove explicit package override (use niri-flake default), drop
KDE portal, set xdg.portal.config for deterministic portal resolution,
remove unused waybar
- core: replace synchronous auto-optimise-store with async
nix.optimise.automatic, reduce zramSwap.memoryPercent from 300 to 100
- dev: add python3 and uv to system packages
- add .mcp.json (nixos MCP server) and CLAUDE.md
