feat(home-manager): enable news display and CLI

- Set news.display to show
- Add home-manager package for CLI access to news
- Persist news state and generations under impermanence
- Add homeConfigurations output for standalone news CLI
- Create symlink so CLI can find the flake config

Author: workflow

flake.nix

@@ -129,6 +129,21 @@
       extraModules = [./system/amd ./system/btrfs];
     };
 
+    # Minimal home-manager standalone configuration for `home-manager news` CLI only
+    # Actual home-manager is managed via NixOS module (see nixosConfigurations above)
+    homeConfigurations.farlion = home-manager.lib.homeManagerConfiguration {
+      pkgs = nixpkgs.legacyPackages.x86_64-linux;
+      modules = [
+        {
+          home = {
+            username = "farlion";
+            homeDirectory = "/home/farlion";
+            stateVersion = "24.11";
+          };
+        }
+      ];
+    };
+
     # Expose profiling helper as a package and an app
     # Call with `nix run .#nh-eval-profile -- <HOST>`
     packages.x86_64-linux.nh-eval-profile = let

home/default.nix

@@ -157,6 +157,11 @@ in {
       target = "nixos-config";
     };
 
+    # Symlink flake for `home-manager news` CLI to find homeConfigurations
+    file.".config/home-manager/flake.nix" = {
+      source = config.lib.file.mkOutOfStoreSymlink "${config.home.homeDirectory}/code/nixos-config/flake.nix";
+    };
+
     packages = with pkgs; [
       alejandra # Nix Formatter
       ast-grep # Pure Magic
@@ -181,6 +186,7 @@ in {
       google-chrome
       gucharmap # Unicode Character Map
       hardinfo2 # Hardware/System Info
+      home-manager # CLI for managing home-manager, needed for `home-manager news`
       httpie
       iftop # Net top tool, see also nethogs
       imagemagick

home/impermanence/default.nix

@@ -7,7 +7,9 @@
       ".cache/nix"
       ".config/helm" # Helm repositories
       ".config/nix" # cachix repositories and such
+      ".local/share/home-manager" # home-manager news read state
       ".local/share/nix" # Nix Repl History
+      ".local/state/home-manager" # home-manager generations and GC roots
     ];
   };
 }