Refactor nix config

newnix/modules/home/dev.nix

@@ -9,6 +9,5 @@
 
   home.packages = with pkgs; [
     visidata
-    bubblewrap
   ];
 }

newnix/modules/home/llm.nix

@@ -2,6 +2,7 @@
 
 {
   home.packages = with pkgs; [
+    bubblewrap
     claude-code
     opencode
     gemini-cli

newnix/modules/nixos/common.nix

@@ -0,0 +1,40 @@
+{ config, pkgs, lib, ... }:
+
+{
+  time.timeZone = "Europe/Berlin";
+  i18n.defaultLocale = "en_US.UTF-8";
+
+  i18n.extraLocaleSettings = {
+    LC_ADDRESS = "de_DE.UTF-8";
+    LC_IDENTIFICATION = "de_DE.UTF-8";
+    LC_MEASUREMENT = "de_DE.UTF-8";
+    LC_MONETARY = "de_DE.UTF-8";
+    LC_NAME = "de_DE.UTF-8";
+    LC_NUMERIC = "de_DE.UTF-8";
+    LC_PAPER = "de_DE.UTF-8";
+    LC_TELEPHONE = "de_DE.UTF-8";
+    LC_TIME = "de_DE.UTF-8";
+  };
+
+  programs.zsh.enable = true;
+
+  nix.settings = {
+    experimental-features = [ "nix-command" "flakes" ];
+    auto-optimise-store = true;
+  };
+
+  nixpkgs.config.allowUnfree = true;
+
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 7d";
+  };
+
+  environment.systemPackages = with pkgs; [
+    git
+    wget
+    curl
+    vim
+  ];
+}