📦 Moved more configs to common files, and refactored code with common

common.nix

@@ -1,16 +1,26 @@
 rec {
+  default = {
+    browser = "io.github.zen_browser.zen.desktop";
+    calculator = "gnome-calculator";
+    fileManager = "nautilus";
+    imageViewer = "org.gnome.Loupe.desktop";
+    lockScreen = "hyprlock";
+    terminal = "kitty";
+  };
+
+  dir = {
+    home = "/home/${username}";
+    pictures = "${dir.home}/Pictures";
+  };
+
+  hostname = "nixos";
+
   keymaps = {
     layout = "gb,no";
     options = "grp:alt_shift_toggle"; # Toggle using ALT + SHIFT
   };
 
   username = "martin";
-  hostname = "nixos";
-
-  dir = {
-    home = "/home/${username}";
-    pictures = "${dir.home}/Pictures";
-  };
 
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
@@ -19,5 +29,5 @@ rec {
   # Before changing this value read the documentation for this option
   # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
   system.version = "24.11";
-  terminal = "kitty";
+  terminal = default.terminal; # TODO remove
 }