hypr: move session daemons from exec-once to systemd user services

Replace the hl.exec_cmd autostart block with declarative home-manager
services so the desktop shell has proper ordering and lifecycle:

- services.hyprpaper (with settings) for hyprpaper
- services.cliphist for the text/image clipboard watchers
- services.hyprpolkitagent for the polkit agent
- programs.quickshell.systemd for the quickshell shell
- a hand-written systemd.user.services.mako (home-manager has no unit)

All are tied to config.wayland.systemd.target (graphical-session.target),
which start-hyprland already activates. No UWSM required.

home/hypr/default.nix

@@ -18,6 +18,7 @@ in
     ./hyprlock.nix
     ./hypridle.nix
     ./quickshell.nix
+    ./services.nix
   ];
 
   home.packages = with pkgs; [
@@ -25,24 +26,32 @@ in
     grim
     slurp
     wl-clipboard
-    cliphist
     brightnessctl
     jq
 
     # Desktop Environment / Hyprland ecosystem
     hyprpaper
-    hyprpolkitagent
   ];
 
   # Build-time rendered wallpaper
   xdg.dataFile."backgrounds/silicon-volt.png".source = wallpaper;
 
-  # hyprpaper: load the Silicon Volt wallpaper on every output
-  xdg.configFile."hypr/hyprpaper.conf".text = ''
-    preload = ${config.home.homeDirectory}/.local/share/backgrounds/silicon-volt.png
-    wallpaper = ,${config.home.homeDirectory}/.local/share/backgrounds/silicon-volt.png
-    splash = false
-  '';
+  # hyprpaper: load the Silicon Volt wallpaper on every output. The
+  # home-manager module writes hypr/hyprpaper.conf and runs the daemon as a
+  # systemd user service tied to the Wayland session.
+  services.hyprpaper = {
+    enable = true;
+    settings = {
+      splash = false;
+      preload = "${config.home.homeDirectory}/.local/share/backgrounds/silicon-volt.png";
+      wallpaper = [
+        {
+          monitor = "";
+          path = "${config.home.homeDirectory}/.local/share/backgrounds/silicon-volt.png";
+        }
+      ];
+    };
+  };
 
   # Notifications: flat brutalist-glass cards with volt accents
   services.mako = {

home/hypr/hyprland.nix

@@ -1,5 +1,4 @@
 {
-  pkgs,
   lib,
   config,
   ...
@@ -282,24 +281,12 @@ in
         ];
 
         # -----------------------------------------------------------------------
-        # 6. Autostart Daemons & Apps (hl.on)
+        # 6. Autostart Daemons & Apps
         # -----------------------------------------------------------------------
-        on = [
-          {
-            _args = [
-              "hyprland.start"
-              (mkLua ''
-                function()
-                              hl.exec_cmd("qs")
-                              hl.exec_cmd("hyprpaper")
-                              hl.exec_cmd("mako")
-                              hl.exec_cmd("wl-paste --type text --watch cliphist store")
-                              hl.exec_cmd("wl-paste --type image --watch cliphist store")
-                              hl.exec_cmd("${pkgs.hyprpolkitagent}/libexec/hyprpolkitagent")
-                            end'')
-            ];
-          }
-        ];
+        # Desktop daemons (quickshell, hyprpaper, mako, cliphist and the
+        # polkit agent) are declared as systemd user services in
+        # home/hypr/services.nix and home/hypr/quickshell.nix, tied to the
+        # Wayland session target instead of exec-once.
 
         # -----------------------------------------------------------------------
         # 7. Keybindings (hl.bind)

home/hypr/quickshell.nix

@@ -14,11 +14,6 @@ let
       (pkgs.quickshell or pkgs.qt6.qtbase);
 in
 {
-  home.packages = with pkgs; [
-    quickshellPkg
-    qt6.qtwayland
-  ];
-
   # Quickshell overview module for Hyprland (Super+Tab workspace overview).
   # Vendored from: https://github.com/Shanu-Kumawat/quickshell-overview
   # Placed at the quickshell config root so a bare `qs` finds shell.qml.
@@ -26,4 +21,15 @@ in
     source = ./quickshell;
     recursive = true;
   };
+
+  # Run quickshell as a systemd user service tied to the Wayland session.
+  programs.quickshell = {
+    enable = true;
+    package = quickshellPkg;
+    systemd.enable = true;
+  };
+
+  home.packages = with pkgs; [
+    qt6.qtwayland
+  ];
 }

home/hypr/services.nix

@@ -0,0 +1,37 @@
+{
+  config,
+  pkgs,
+  ...
+}:
+
+let
+  # The Wayland session target used by the home-manager Wayland modules
+  # (resolves to graphical-session.target). start-hyprland activates it.
+  sessionTarget = config.wayland.systemd.target;
+in
+{
+  # PolicyKit agent (replaces the old hl.exec_cmd autostart).
+  services.hyprpolkitagent.enable = true;
+
+  # Clipboard history. The module runs both the text and image watchers as
+  # systemd user services and adds the cliphist package.
+  services.cliphist.enable = true;
+
+  # mako has no systemd service in home-manager, so declare one here.
+  # Configuration lives next to the rest of the desktop theme in default.nix.
+  systemd.user.services.mako = {
+    Unit = {
+      Description = "mako notification daemon";
+      After = [ sessionTarget ];
+      PartOf = [ sessionTarget ];
+    };
+
+    Service = {
+      ExecStart = "${pkgs.mako}/bin/mako";
+      Restart = "always";
+      RestartSec = 2;
+    };
+
+    Install.WantedBy = [ sessionTarget ];
+  };
+}