feat(desktop): add mako notifications (task 0025)

Add a mako notification daemon module to the desktop group, enabled by
the aggregator. Toasts auto-dismiss into history after five seconds, a
do-not-disturb mode ([mode=dnd] invisible=true) suppresses display while
still recording to history, and Super+N recalls the last notification
via makoctl restore. Colors and the popup font come from Stylix's mako
target. The bar-side do-not-disturb toggle and media controls already
live in waybar.nix, so this task adds only the daemon.

.claude/tasks/0025-mako-notifications.md

@@ -12,7 +12,31 @@ The do-not-disturb toggle and media controls live in the bar, not in a separate
 
 ## Acceptance criteria
 
-- [ ] A mako module exists in the desktop group and is enabled by the aggregator.
-- [ ] Notification toasts appear, with do-not-disturb and history recall.
-- [ ] No separate slide-out notification-center panel is added.
-- [ ] neogaia builds green under `nix flake check`.
+- [x] A mako module exists in the desktop group and is enabled by the aggregator.
+- [x] Notification toasts appear, with do-not-disturb and history recall.
+- [x] No separate slide-out notification-center panel is added.
+- [x] neogaia builds green under `nix flake check`.
+
+## Implementation Notes
+
+- **Bar side already in place.**
+  The do-not-disturb toggle (`custom/dnd`, calling `makoctl mode -t dnd`) and the MPRIS media controls already live in `modules/desktop/waybar.nix` from task 0024.
+  This task therefore adds only the daemon: `modules/desktop/mako.nix` enables `services.mako` through home-manager and is turned on by the aggregator.
+  The mode name is `dnd` on both sides, so the bar's toggle and the daemon's `[mode=dnd]` section agree.
+
+- **Colors from Stylix.**
+  Stylix ships a mako target that drives the background, border, text, and progress colors plus the popup font from the one Nord base16 scheme, so the module sets no colors — only behaviour.
+  This mirrors how `rofi.nix` and `theming.nix` defer their palettes to Stylix.
+
+- **Do-not-disturb keeps history.**
+  The `[mode=dnd]` section sets `invisible=true`, which hides toasts while still recording them, so notifications missed during do-not-disturb remain retrievable.
+
+- **History recall keybind.**
+  `Super+N` runs `makoctl restore`, popping the last notification back from history keyboard-only, consistent with the rest of the session.
+  `N` is unused by the spec keybind table, and task 0021 established that each later task adds its own binding rather than 0021 binding to a then-missing tool.
+
+- **No Waybar icon mapping.**
+  The window-rewrite convention covers graphical apps whose windows appear on the workspace indicator; mako renders toasts as a layer-shell overlay with no tiled window and no `hyprctl clients` entry, so there is nothing to match on.
+
+- **Dropped from the plan.**
+  A `Super+Shift+N` dismiss-all binding was drafted alongside the recall bind but removed as unrequested scope: the acceptance criteria call for history recall, which `restore` alone serves.

modules/desktop/desktop.nix

@@ -11,6 +11,7 @@ in
   config = lib.mkIf cfg.enable {
     modules.desktop.hyprland.enable = lib.mkDefault true;
     modules.desktop.login.enable = lib.mkDefault true;
+    modules.desktop.mako.enable = lib.mkDefault true;
     modules.desktop.rofi.enable = lib.mkDefault true;
     modules.desktop.terminal.enable = lib.mkDefault true;
     modules.desktop.theming.enable = lib.mkDefault true;

modules/desktop/mako.nix

@@ -0,0 +1,44 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+# mako as the notification daemon: toasts, a do-not-disturb mode, and history recall.
+let
+  cfg = config.modules.desktop.mako;
+  user = config.user.name;
+
+  makoctl = "${pkgs.mako}/bin/makoctl";
+in
+{
+  options.modules.desktop.mako.enable = lib.mkEnableOption "the mako notification daemon";
+
+  config = lib.mkIf cfg.enable {
+    home-manager.users.${user} = {
+      # Colors and the popup font come from Stylix's mako target, so only
+      # behaviour is set here.
+      services.mako = {
+        enable = true;
+
+        settings = {
+          # Toasts auto-dismiss into history rather than lingering.
+          # mako's own default of 0 leaves every notification on screen until acted on.
+          default-timeout = 5000;
+
+          # The do-not-disturb mode.
+          # Invisible hides the toasts but still records them to history.
+          # Missed notifications can therefore be recalled.
+          "mode=dnd".invisible = true;
+        };
+      };
+
+      # Recall the last notification from history, keyboard-only like the rest
+      # of the session.
+      # $mod is defined by the compositor config these binds share.
+      wayland.windowManager.hyprland.settings.bind = [
+        "$mod, N, exec, ${makoctl} restore"
+      ];
+    };
+  };
+}