refactor config with better structure

justfile

@@ -32,7 +32,7 @@ clean-system:
     sudo nix-env --profile /nix/var/nix/profiles/system --delete-generations +3
     sudo nix-collect-garbage
     @echo "--- Updating Bootloader Menu ---"
-    sudo nixos-rebuild boot --flake
+    sudo nixos-rebuild boot --flake .#prouk
 
 # Clean user generations (no sudo).
 clean-user:
@@ -57,9 +57,9 @@ clean-all: clean-system clean-user clean-home-manager
 # Build.
 build:
     @echo "--- Rebuilding System ---"
-    sudo nixos-rebuild switch --flake
+    sudo nixos-rebuild switch --flake .#prouk
 
 # Update flake.
 update:
     @echo "--- Updating Flake ---"
-    sudo nix flake update
+    nix flake update