feat(desktop): bluetooth module, tile and page

Native Quickshell.Bluetooth for adapter power, discoverable, scan,
connect, disconnect, trust and forget. Pairing is separate, because
quickshell ships no BlueZ agent.

The adapter is null for the first ~2s, so every access is navigated
safely rather than assuming a first paint.

4 files changed, 293 insertions, 0 deletions

diff --git a/desktop/modules/bluetooth/BluetoothModule.qml b/desktop/modules/bluetooth/BluetoothModule.qml
new file mode 100644
index 0000000..84ac9a4
--- /dev/null
+++ b/desktop/modules/bluetooth/BluetoothModule.qml
@@ -0,0 +1,55 @@
+// 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.Bluetooth
+import Quickshell.Io
+import QtQuick
+import "../.."
+
+// Always active: the BlueZ backend pushes and there is no poll to gate.
+// Referencing Bluetooth here instantiates it at shell start.
+Module {
+    id: mod
+
+    name: "bluetooth"
+    label: "Bluetooth"
+    alwaysActive: true
+
+    readonly property var adapter: Bluetooth.defaultAdapter
+    readonly property var devices: Bluetooth.devices ? Bluetooth.devices.values : []
+    readonly property var connectedDevices: devices.filter(d => d.connected)
+    readonly property var pairedDevices: devices.filter(d => d.paired && !d.connected)
+    readonly property var availableDevices: devices.filter(d => !d.paired)
+
+    readonly property bool anyConnected: connectedDevices.length > 0
+
+    // Null for the first ~2s, then filled. Safe navigation everywhere.
+    icon: mod.adapter && mod.adapter.enabled ? "\uf293" : "\uf05e"
+
+    function notify(title, body) {
+        notifyProc.command = ["notify-send", "--app-name=bluetooth",
+                              "--urgency=critical", "--icon=error", title, body];
+        notifyProc.running = false;
+        notifyProc.running = true;
+    }
+
+    property Process notifyProc: Process {}
+
+    tileContent: Component { BluetoothTile { bt: mod } }
+
+    page: Component {
+        Page {
+            title: "Bluetooth"
+            BluetoothPage { width: parent.width; bt: mod }
+        }
+    }
+}
diff --git a/desktop/modules/bluetooth/BluetoothPage.qml b/desktop/modules/bluetooth/BluetoothPage.qml
new file mode 100644
index 0000000..c608d82
--- /dev/null
+++ b/desktop/modules/bluetooth/BluetoothPage.qml
@@ -0,0 +1,127 @@
+// 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 QtQuick
+import QtQuick.Controls
+import "../.."
+
+Column {
+    id: page
+
+    required property var bt
+    signal back
+
+    spacing: 14
+
+    // --- Adapter ---
+
+    Item {
+        width: page.width
+        implicitHeight: Math.max(btLabel.implicitHeight, powerSwitch.implicitHeight)
+
+        Text {
+            id: btLabel
+            anchors.verticalCenter: parent.verticalCenter
+            text: "Bluetooth"
+            font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 1; bold: true }
+            color: Theme.text
+        }
+
+        Switch {
+            id: powerSwitch
+            anchors { right: parent.right; verticalCenter: parent.verticalCenter }
+            checked: page.bt.adapter ? page.bt.adapter.enabled : false
+            onToggled: if (page.bt.adapter) page.bt.adapter.enabled = checked
+        }
+    }
+
+    Text {
+        width: page.width
+        visible: !(page.bt.adapter && page.bt.adapter.enabled)
+        text: "Bluetooth off"
+        font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 2 }
+        color: Theme.subtext
+    }
+
+    Item {
+        width: page.width
+        visible: page.bt.adapter && page.bt.adapter.enabled
+        implicitHeight: Math.max(visLabel.implicitHeight, visSwitch.implicitHeight)
+
+        Text {
+            id: visLabel
+            anchors.verticalCenter: parent.verticalCenter
+            text: "Visible"
+            font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 2 }
+            color: Theme.text
+        }
+
+        Switch {
+            id: visSwitch
+            anchors { right: parent.right; verticalCenter: parent.verticalCenter }
+            checked: page.bt.adapter ? page.bt.adapter.discoverable : false
+            onToggled: if (page.bt.adapter) page.bt.adapter.discoverable = checked
+        }
+    }
+
+    Row {
+        width: page.width
+        visible: page.bt.adapter && page.bt.adapter.enabled
+        spacing: 8
+
+        Button {
+            text: page.bt.adapter && page.bt.adapter.discovering ? "Stop scan" : "Scan"
+            onClicked: if (page.bt.adapter) page.bt.adapter.discovering = !page.bt.adapter.discovering
+        }
+    }
+
+    // --- Connected ---
+
+    Text {
+        width: page.width
+        visible: page.bt.connectedDevices.length > 0
+        text: "Connected"
+        font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 2; bold: true }
+        color: Theme.subtext
+    }
+
+    Repeater {
+        model: page.bt.connectedDevices
+
+        BluetoothRow {
+            required property var modelData
+            bt: page.bt
+            device: modelData
+            width: page.width
+        }
+    }
+
+    // --- Paired ---
+
+    Text {
+        width: page.width
+        visible: page.bt.pairedDevices.length > 0
+        text: "Paired"
+        font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 2; bold: true }
+        color: Theme.subtext
+    }
+
+    Repeater {
+        model: page.bt.pairedDevices
+
+        BluetoothRow {
+            required property var modelData
+            bt: page.bt
+            device: modelData
+            width: page.width
+        }
+    }
+}
diff --git a/desktop/modules/bluetooth/BluetoothRow.qml b/desktop/modules/bluetooth/BluetoothRow.qml
new file mode 100644
index 0000000..d92bd9a
--- /dev/null
+++ b/desktop/modules/bluetooth/BluetoothRow.qml
@@ -0,0 +1,85 @@
+// 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 QtQuick
+import "../.."
+
+// One tracked device. The actions shown depend on its state: connected,
+// paired-but-idle, or found and not yet paired.
+Rectangle {
+    id: row
+
+    required property var bt
+    required property var device
+
+    implicitHeight: col.implicitHeight + 16
+    radius: 8
+    color: device.connected ? Qt.alpha(Theme.accent, 0.10) : Qt.alpha(Theme.surface, 0.35)
+
+    Column {
+        id: col
+        anchors { left: parent.left; right: parent.right; top: parent.top; margins: 10 }
+        spacing: 8
+
+        Item {
+            width: parent.width
+            implicitHeight: Math.max(nameText.implicitHeight, actions.implicitHeight)
+
+            Text {
+                id: nameText
+                anchors { left: parent.left; right: actions.left; rightMargin: 8; verticalCenter: parent.verticalCenter }
+                elide: Text.ElideRight
+                text: row.device.name || row.device.deviceName || row.device.address
+                font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 2; bold: row.device.connected }
+                color: row.device.connected ? Theme.accent : Theme.text
+            }
+
+            Row {
+                id: actions
+                anchors { right: parent.right; verticalCenter: parent.verticalCenter }
+                spacing: 6
+
+                Text {
+                    anchors.verticalCenter: parent.verticalCenter
+                    visible: row.device.batteryAvailable ?? false
+                    text: Math.round(row.device.battery ?? 0) + "%"
+                    font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 4 }
+                    color: Theme.overlay
+                }
+
+                Button {
+                    visible: !row.device.connected && row.device.paired
+                    text: "Connect"
+                    onClicked: row.device.connect()
+                }
+
+                Button {
+                    visible: row.device.connected
+                    text: "Disconnect"
+                    onClicked: row.device.disconnect()
+                }
+
+                Button {
+                    visible: row.device.paired
+                    text: row.device.trusted ? "Untrust" : "Trust"
+                    onClicked: row.device.trusted = !row.device.trusted
+                }
+
+                Button {
+                    visible: row.device.paired
+                    text: "Forget"
+                    danger: true
+                    onClicked: row.device.forget()
+                }
+            }
+        }
+    }
+}
diff --git a/desktop/modules/bluetooth/BluetoothTile.qml b/desktop/modules/bluetooth/BluetoothTile.qml
new file mode 100644
index 0000000..1489f16
--- /dev/null
+++ b/desktop/modules/bluetooth/BluetoothTile.qml
@@ -0,0 +1,26 @@
+// 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 QtQuick
+import "../.."
+
+Text {
+    required property var bt
+
+    width: parent ? parent.width : implicitWidth
+    elide: Text.ElideRight
+    font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 4 }
+    color: bt.anyConnected ? Theme.text : Theme.subtext
+    text: !bt.adapter || !bt.adapter.enabled ? "Off"
+        : bt.connectedDevices.length === 0 ? "No devices"
+        : bt.connectedDevices.length === 1 ? bt.connectedDevices[0].name
+        : bt.connectedDevices.length + " connected"
+}