feat(desktop): skeleton shell with the keepalive window

The window draws nothing and catches nothing; it exists because a
quickshell config with no visible window exits silently, and this
shell's drawer is closed most of the time.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01We9zcHEH8ZWHPcQwMaJRNv

2 files changed, 30 insertions, 0 deletions

diff --git a/desktop/Theme.qml b/desktop/Theme.qml
new file mode 120000
index 0000000..3d2e40f
--- /dev/null
+++ b/desktop/Theme.qml
@@ -0,0 +1 @@
+../shared/Theme.qml
\ No newline at end of file
diff --git a/desktop/shell.qml b/desktop/shell.qml
new file mode 100644
index 0000000..abddf36
--- /dev/null
+++ b/desktop/shell.qml
@@ -0,0 +1,29 @@
+// Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+import Quickshell
+import Quickshell.Wayland
+
+ShellRoot {
+    // Quickshell exits once no window is visible, and this shell's drawer is
+    // closed most of the time. A 1x1 transparent window with an empty mask
+    // holds the process open without drawing anything or catching a click.
+    // See AGENTS.md: without it the shell loads, reports no error, and quits.
+    PanelWindow {
+        visible: true
+        implicitWidth: 1
+        implicitHeight: 1
+        color: "transparent"
+        exclusionMode: ExclusionMode.Ignore
+        mask: Region {}
+        WlrLayershell.keyboardFocus: WlrKeyboardFocus.None
+    }
+}