feat(home): add xremap with Chromium Emacs keybindings

Adds xremap as a home-manager user service with wlroots/Hyprland support.
Remaps C-a/e/f/b/n/p/d to Emacs-style navigation, scoped to Chromium only.
Adds eduardo to the input group for device access.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: eapolinario

nixos/flake.nix

@@ -20,6 +20,11 @@
       url = "github:nix-community/home-manager";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+
+    xremap-flake = {
+      url = "github:xremap/nix-flake";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs = { self, nixpkgs, disko, home-manager, ... }@inputs:
@@ -34,7 +39,9 @@
             home-manager.useGlobalPkgs = true;
             home-manager.useUserPackages = true;
             home-manager.extraSpecialArgs = { inherit inputs; };
-            home-manager.users.eduardo = import ./home/eduardo;
+            home-manager.users.eduardo = {
+              imports = [ inputs.xremap-flake.homeManagerModules.default ./home/eduardo ];
+            };
           }
           ./hosts/${hostname}
           ./modules/common

nixos/home/eduardo/default.nix

@@ -165,4 +165,26 @@
   };
 
   programs.home-manager.enable = true;
+
+  services.xremap = {
+    enable = true;
+    withWlroots = true;
+    config = {
+      keymap = [
+        {
+          name = "Chromium Emacs bindings";
+          application.only = [ "chromium" ];
+          remap = {
+            "C-a" = "Home";
+            "C-e" = "End";
+            "C-f" = "right";
+            "C-b" = "left";
+            "C-n" = "down";
+            "C-p" = "up";
+            "C-d" = "delete";
+          };
+        }
+      ];
+    };
+  };
 }

nixos/hosts/fusion-vm/default.nix

@@ -20,6 +20,7 @@
   programs.uwsm.enable = true;
 
   users.users.eduardo.shell = pkgs.nushell;
+  users.users.eduardo.extraGroups = [ "input" ];
 
   # Display manager
   services.greetd = {