Update zsh completions

nix/configuration.nix

@@ -11,6 +11,8 @@
           pkgs.htop
         ];
 
+      environment.pathsToLink = [ "/share/zsh" ];
+
       # Necessary for using flakes on this system.
       nix.settings.experimental-features = "nix-command flakes";
 

nix/home.nix

@@ -1,18 +1,8 @@
 { config, pkgs, ... }:
 
 {
+  home.stateVersion = "25.05";
 
-  # This value determines the Home Manager release that your configuration is
-  # compatible with. This helps avoid breakage when a new Home Manager release
-  # introduces backwards incompatible changes.
-  #
-  # You should not change this value, even if you update Home Manager. If you do
-  # want to update the value, then make sure to first check the Home Manager
-  # release notes.
-  home.stateVersion = "25.05"; # Please read the comment before changing.
-
-  # The home.packages option allows you to install Nix packages into your
-  # environment.
   home.packages = [
     pkgs.graphviz
     pkgs.jq
@@ -33,7 +23,15 @@
     #   echo "Hello, ${config.home.username}!"
     # '')
   ];
-  programs.zsh.enable = true;
+  programs.zsh = {
+    enable = true;
+    enableCompletion = true;
+    autosuggestion.enable = true;
+    syntaxHighlighting.enable = true;
+
+    sessionVariables = {CLICOLOR = 1;};
+    shellAliases = {pyact = "source .venv/bin/activate";};
+  };
 
   # Home Manager is pretty good at managing dotfiles. The primary way to manage
   # plain files is through 'home.file'.