feat: Integrate Home Manager into the NixOS flake and define initial user configuration for nimmo.

common/home.nix

@@ -0,0 +1,44 @@
+{ config, pkgs, ... }:
+
+{
+  home.username = "nimmo";
+  home.homeDirectory = "/home/nimmo";
+  home.stateVersion = "24.11";
+
+  programs.bash = {
+    enable = true;
+    enableCompletion = true;
+    
+    # History Search (Prefix sensitive)
+    # Using bashrcExtra ensures it's available in interactive shells
+    bashrcExtra = ''
+      bind '"\e[A": history-search-backward'
+      bind '"\e[B": history-search-forward'
+    '';
+
+    # Bash-it configuration
+    initExtra = ''
+      # Path to the bash-it installation provided by Nix
+      export BASH_IT="${pkgs.bash-it}/share/bash-it"
+
+      # Set the theme
+      export BASH_IT_THEME="rjorgenson"
+
+      # Disable auto-update as Nix manages the package version
+      export BASH_IT_AUTOMATIC_UPDATE_CHECK=false
+
+      # Load Bash-it
+      if [ -f "$BASH_IT/bash_it.sh" ]; then
+        source "$BASH_IT/bash_it.sh"
+      fi
+    '';
+  };
+
+  # Add bash-it to user packages
+  home.packages = with pkgs; [
+    bash-it
+  ];
+
+  # Let Home Manager install and manage itself.
+  programs.home-manager.enable = true;
+}

flake.nix

@@ -7,7 +7,11 @@
 
     # 2. Antigravity (Google) - Custom Flake
     antigravity.url = "github:jacopone/antigravity-nix";
-    antigravity.inputs.nixpkgs.follows = "nixpkgs"; 
+    antigravity.inputs.nixpkgs.follows = "nixpkgs";
+
+    # 3. Home Manager
+    home-manager.url = "github:nix-community/home-manager";
+    home-manager.inputs.nixpkgs.follows = "nixpkgs";
   };
 
   outputs = { self, nixpkgs, ... }@inputs: {
@@ -21,6 +25,13 @@
         specialArgs = { inherit inputs; };
         modules = [
           ./hosts/electra/default.nix
+          inputs.home-manager.nixosModules.home-manager
+          {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.extraSpecialArgs = { inherit inputs; };
+            home-manager.users.nimmo = import ./common/home.nix;
+          }
         ];
       };
 
@@ -32,6 +43,13 @@
         specialArgs = { inherit inputs; };
         modules = [
           ./hosts/lena/default.nix
+          inputs.home-manager.nixosModules.home-manager
+          {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.extraSpecialArgs = { inherit inputs; };
+            home-manager.users.nimmo = import ./common/home.nix;
+          }
         ];
       };