Run moongreet inside Niri compositor via greetd

Moongreet needs a Wayland compositor — greetd now starts Niri with
a minimal greeter-only config (no keybinds, no gaps, auto-quit).

defaults/etc/greetd/config.toml

@@ -1,9 +1,11 @@
 # ABOUTME: greetd-Konfiguration fuer Moonarch.
-# ABOUTME: Startet moongreet als Wayland-Greeter via gtk4-layer-shell.
+# ABOUTME: Startet Niri als Compositor fuer den Moongreet-Greeter.
 
 [terminal]
 vt = 1
 
 [default_session]
-command = "moongreet"
+# Moongreet braucht einen Wayland-Compositor — niri stellt diesen bereit.
+# Siehe niri-greeter.kdl fuer die Compositor-Konfiguration.
+command = "niri -c /etc/greetd/niri-greeter.kdl"
 user = "greeter"

defaults/etc/greetd/niri-greeter.kdl

@@ -0,0 +1,59 @@
+// ABOUTME: Niri-Konfiguration fuer den Moongreet Login-Greeter.
+// ABOUTME: Wird von greetd gestartet — minimale Config ohne Keybinds fuer Sicherheit.
+
+input {
+    keyboard {
+        xkb {
+            layout "de"
+        }
+        numlock
+    }
+
+    touchpad {
+        tap
+        natural-scroll
+    }
+
+    mouse {
+        accel-profile "flat"
+    }
+}
+
+cursor {
+    xcursor-theme "Sweet-cursors"
+}
+
+layout {
+    gaps 0
+
+    focus-ring {
+        off
+    }
+
+    border {
+        off
+    }
+}
+
+// Moongreet starten und niri beenden, sobald moongreet sich schliesst.
+// Retry-Loop stellt sicher, dass niri auch bei fruehen Crashes von moongreet beendet wird.
+spawn-sh-at-startup "moongreet; while ! niri msg action quit --skip-confirmation 2>/dev/null; do sleep 0.5; done"
+
+// Greeter-Fenster maximiert darstellen
+window-rule {
+    open-maximized true
+}
+
+hotkey-overlay {
+    skip-at-startup
+}
+
+prefer-no-csd
+
+animations {
+    off
+}
+
+binds {
+    // Keine Keybinds — verhindert Zugriff auf Terminals oder andere Aktionen
+}

defaults/xdg/stasis/stasis.rune

@@ -0,0 +1,78 @@
+# Stasis idle manager configuration for Moonarch
+# Manages screen dimming, DPMS, lock, and suspend timers
+
+@author "Moonarch"
+@description "Idle management for Moonarch (Niri + moonlock)"
+
+default:
+  # Media playback inhibits idle (non-browser only, browser uses D-Bus inhibit)
+  monitor_media true
+  ignore_remote_media true
+
+  # App/process inhibit patterns (apps that don't use D-Bus idle-inhibit)
+  inhibit_apps [
+    "vlc"
+    "mpv"
+    "celluloid"
+    r"steam_app_.*"
+    "gamescope"
+    "virt-manager"
+    "qemu"
+    "obs"
+    "kdenlive"
+    "handbrake"
+    "blender"
+  ]
+
+  # Lid actions (laptop only)
+  lid_close_action "moonlock"
+  lid_open_action  ""
+
+  # AC power plan (relaxed)
+  ac:
+    brightness:
+      timeout 300
+      command "brightnessctl set 50%"
+    end
+
+    dpms:
+      timeout 120
+      command "niri msg action power-off-monitors"
+      resume_command "niri msg action power-on-monitors"
+    end
+
+    lock_screen:
+      timeout 180
+      command "moonlock"
+    end
+
+    suspend:
+      timeout 600
+      command "systemctl suspend"
+    end
+  end
+
+  # Battery plan (aggressive)
+  battery:
+    brightness:
+      timeout 60
+      command "brightnessctl set 30%"
+    end
+
+    dpms:
+      timeout 30
+      command "niri msg action power-off-monitors"
+      resume_command "niri msg action power-on-monitors"
+    end
+
+    lock_screen:
+      timeout 60
+      command "moonlock"
+    end
+
+    suspend:
+      timeout 120
+      command "systemctl suspend"
+    end
+  end
+end