feat(notifications): add the balloon shell

Reads the daemon's queue through the Notify singleton and draws a balloon
per live notification, bottom-right of DP-1 over conky. Suppression is here,
not in the daemon: dnd withholds low and normal, snooze withholds all, and
the drawer still lists them.

1 files changed, 68 insertions, 0 deletions

diff --git a/notifications/Balloons.qml b/notifications/Balloons.qml
new file mode 100644
index 0000000..28ffafb
--- /dev/null
+++ b/notifications/Balloons.qml
@@ -0,0 +1,68 @@
+// 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
+import QtQuick
+
+// The balloon stack, bottom-right of DP-1, over conky.
+Scope {
+    id: root
+
+    // A tick drives both expiry and the end of a snooze without waiting for a
+    // file change. 250ms keeps ronema's -t 1 near-instant.
+    property double now: Date.now()
+    Timer {
+        interval: 250
+        running: true
+        repeat: true
+        onTriggered: root.now = Date.now()
+    }
+
+    // Which live notifications draw here. Suppression is deliberately here
+    // and not in the daemon: the drawer lists a notification DND chose not to
+    // pop, because a list the user opened is not an interruption.
+    readonly property var visible: (Notify.queue || []).filter(p => {
+        if (Notify.drawerOpen) return false;
+        if (p.expires !== 0 && root.now >= p.expires) return false;
+        if (Notify.snoozeUntil > root.now) return false;
+        if (Status.dnd && p.urgency !== "critical") return false;
+        return true;
+    })
+
+    PanelWindow {
+        id: win
+
+        visible: root.visible.length > 0
+        screen: Quickshell.screens.find(s => s.name === "DP-1") ?? Quickshell.screens[0]
+        anchors { bottom: true; right: true }
+        margins { bottom: 12; right: 12 }
+        implicitWidth: 340
+        implicitHeight: column.implicitHeight
+        color: "transparent"
+        exclusionMode: ExclusionMode.Ignore
+        WlrLayershell.layer: WlrLayer.Overlay
+        WlrLayershell.namespace: "quickshell-notifications"
+        WlrLayershell.keyboardFocus: WlrKeyboardFocus.None
+
+        Column {
+            id: column
+            width: parent.width
+            anchors { bottom: parent.bottom; right: parent.right }
+            spacing: 8
+
+            Repeater {
+                model: root.visible
+                NotificationBalloon { notification: modelData }
+            }
+        }
+    }
+}