feat(keymap): route installer layout choice into Hyprland's Wayland session

core/home/config/nomarchy/default/hypr/input.conf hardcoded
`kb_layout = us`, so the installer's services.xserver.xkb.layout and
console.keyMap writes (both set from the installer's KEYMAP_LAYOUT
prompt) only reached XWayland apps and the TTY console. Native-Wayland
apps — i.e. almost everything in a Nomarchy desktop — fell back to US
regardless of what the user picked. Surprising for any non-US user.

Path (a) from the Later row:

  - Added nomarchy.keymap.{layout,variant} to core/home/options.nix
    (defaults "us" / "").
  - Deleted the static input.conf from the bulk nomarchy/ deploy.
  - Replaced it with an explicit
    xdg.configFile."nomarchy/default/hypr/input.conf".text in
    core/home/configs.nix that interpolates the option values into
    kb_layout / kb_variant.
  - Installer's home.nix heredoc now writes
      nomarchy.keymap = { layout = "$KEYMAP_LAYOUT"; variant = "$KEYMAP_VARIANT"; };
    alongside nomarchy.formFactor, so the layout reaches Hyprland
    consistently with system.nix's xkb.layout / console.keyMap.

Documented in docs/OPTIONS.md (new `nomarchy.keymap.layout` /
`nomarchy.keymap.variant` entry). `nix flake check --no-build` clean.

core/home/config/nomarchy/default/hypr/input.conf

@@ -1,21 +0,0 @@
-# https://wiki.hyprland.org/Configuring/Variables/#input
-input {
-    kb_layout = us
-    kb_variant =
-    kb_model =
-    kb_options = compose:caps
-    kb_rules =
-
-    follow_mouse = 1
-
-    sensitivity = 0 # -1.0 - 1.0, 0 means no modification.
-
-    touchpad {
-        natural_scroll = false
-    }
-}
-
-misc {
-    key_press_enables_dpms = true  # key press will trigger wake
-    mouse_move_enables_dpms = true # mouse move will trigger wake
-}

core/home/configs.nix

@@ -59,6 +59,37 @@ in
     # built-in defaults and every Nomarchy notification customization is
     # inert.
     "mako/config".source = lib.mkDefault ./config/nomarchy/default/mako/core.ini;
+
+    # Hyprland's native-Wayland input config — templated from
+    # nomarchy.keymap.{layout,variant} so non-US users get the right
+    # layout in Wayland apps. The previous static input.conf hardcoded
+    # `kb_layout = us`, so the installer's xkb.layout / console.keyMap
+    # writes only reached XWayland and the TTY. Generated here rather
+    # than shipped under config/nomarchy/default/hypr/ so the keymap
+    # values can vary per-host without a source-file edit.
+    "nomarchy/default/hypr/input.conf".text = lib.mkDefault ''
+      # https://wiki.hyprland.org/Configuring/Variables/#input
+      input {
+          kb_layout = ${config.nomarchy.keymap.layout}
+          kb_variant = ${config.nomarchy.keymap.variant}
+          kb_model =
+          kb_options = compose:caps
+          kb_rules =
+
+          follow_mouse = 1
+
+          sensitivity = 0 # -1.0 - 1.0, 0 means no modification.
+
+          touchpad {
+              natural_scroll = false
+          }
+      }
+
+      misc {
+          key_press_enables_dpms = true  # key press will trigger wake
+          mouse_move_enables_dpms = true # mouse move will trigger wake
+      }
+    '';
   };
 
   home.file.".XCompose" = lib.mkDefault {

core/home/options.nix

@@ -56,6 +56,31 @@ in
         explicit value into the generated home.nix.
       '';
     };
+    keymap = {
+      layout = lib.mkOption {
+        type = lib.types.str;
+        default = "us";
+        example = "dk";
+        description = ''
+          Keyboard layout for Hyprland's native Wayland session. The
+          installer also writes services.xserver.xkb.layout (for XWayland)
+          and console.keyMap (for the TTY) to the same value via
+          system.nix, but Hyprland reads its own input config so it needs
+          this option independently — otherwise non-US users get the
+          right layout in XWayland apps and the console but the US
+          fallback inside native-Wayland apps.
+        '';
+      };
+      variant = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+        example = "intl";
+        description = ''
+          Keyboard variant for Hyprland (e.g. "intl" for US-International).
+          Empty by default.
+        '';
+      };
+    };
     wallpaper = lib.mkOption {
       type = lib.types.str;
       default = schema.home.wallpaper;