refactor(hyprland): loop directional keybinds

configs/nixos/modules/desktop/session/hyprland/default.nix

@@ -9,6 +9,7 @@
 
   config = lib.mkIf config.modules.desktop.session.hyprland.enable {
     registry.keybind.${config.networking.hostName} = lib.mkMerge [
+      # Generate numeric workspace focus keybinds.
       (lib.listToAttrs (
         map (workspace: {
           name = "hyprland-workspace-${toString workspace}";
@@ -21,39 +22,41 @@
           };
         }) (lib.range 1 9)
       ))
-      {
-        hyprland-focus-left = {
-          keys = "SUPER + H";
-          action = {
-            kind = "focus";
-            direction = "left";
-          };
-        };
-
-        hyprland-focus-down = {
-          keys = "SUPER + J";
-          action = {
-            kind = "focus";
-            direction = "down";
-          };
-        };
-
-        hyprland-focus-up = {
-          keys = "SUPER + K";
-          action = {
-            kind = "focus";
-            direction = "up";
-          };
-        };
-
-        hyprland-focus-right = {
-          keys = "SUPER + L";
-          action = {
-            kind = "focus";
-            direction = "right";
-          };
-        };
-      }
+      # Generate directional focus keybinds from Vim movement keys.
+      (lib.listToAttrs (
+        map
+          (
+            { direction, key }:
+            {
+              name = "hyprland-focus-${direction}";
+              value = {
+                keys = "SUPER + ${key}";
+                action = {
+                  kind = "focus";
+                  inherit direction;
+                };
+              };
+            }
+          )
+          [
+            {
+              key = "H";
+              direction = "left";
+            }
+            {
+              key = "J";
+              direction = "down";
+            }
+            {
+              key = "K";
+              direction = "up";
+            }
+            {
+              key = "L";
+              direction = "right";
+            }
+          ]
+      ))
     ];
 
     # This program integration owns the session, portals, and polkit, launched