add battery widget

roles/quickshell/files/bar/Bar.qml

@@ -59,6 +59,9 @@ PanelWindow {
                 anchors.verticalCenter: parent.verticalCenter
                 barWindow: root
             }
+			Battery {
+				anchors.verticalCenter: parent.verticalCenter
+			}
             NetworkStatus {
                 anchors.verticalCenter: parent.verticalCenter
             }

roles/quickshell/files/bar/Battery.qml

@@ -0,0 +1,84 @@
+import Quickshell
+import Quickshell.Io
+import QtQuick
+import "../components"
+
+Item {
+    id: root
+    implicitWidth: hasBattery ? row.implicitWidth + 10 : 0
+    implicitHeight: 24
+    visible: hasBattery
+
+    property bool hasBattery: false
+    property int percent: 0
+    property string status: "Unknown"  // "Charging", "Discharging", "Full", "Unknown"
+
+    // \uf0e7 = bolt (charging), \uf240-\uf244 = FA battery full…empty
+    readonly property string battIcon: {
+        if (status === "Charging" || status === "Full") return "\uf0e7"
+        if (percent <= 10) return "\uf244"
+        if (percent <= 25) return "\uf243"
+        if (percent <= 50) return "\uf242"
+        if (percent <= 75) return "\uf241"
+        return "\uf240"
+    }
+
+    readonly property bool isLow: percent <= 20 && status === "Discharging"
+
+    Timer {
+        interval: 30000
+        running: true
+        repeat: true
+        triggeredOnStart: true
+        onTriggered: battProc.running = true
+    }
+
+    Process {
+        id: battProc
+        // Find first BAT* supply; print "NONE" if none exists
+        command: ["sh", "-c",
+            "BAT=$(ls /sys/class/power_supply/ 2>/dev/null | grep -m1 '^BAT'); " +
+            "[ -z \"$BAT\" ] && echo NONE && exit 0; " +
+            "echo \"$(cat /sys/class/power_supply/$BAT/capacity):$(cat /sys/class/power_supply/$BAT/status)\""
+        ]
+        stdout: SplitParser {
+            splitMarker: "\n"
+            onRead: data => {
+                const line = data.trim()
+                if (line === "" || line === "NONE") {
+                    root.hasBattery = false
+                    return
+                }
+                const sep = line.indexOf(":")
+                if (sep < 0) return
+                root.percent = parseInt(line.substring(0, sep)) || 0
+                root.status  = line.substring(sep + 1)
+                root.hasBattery = true
+            }
+        }
+        onExited: running = false
+    }
+
+    Row {
+        id: row
+        anchors.centerIn: parent
+        spacing: 5
+
+        Text {
+            anchors.verticalCenter: parent.verticalCenter
+            text: root.battIcon
+            font.family: "JetBrainsMono Nerd Font Mono"
+            font.pixelSize: 14
+            color: root.status === "Charging" ? Theme.accent
+                 : root.isLow               ? "#cc3333"
+                 :                             Theme.text
+        }
+
+        Text {
+            anchors.verticalCenter: parent.verticalCenter
+            text: root.percent + "%"
+            font.pixelSize: 11
+            color: root.isLow ? "#cc3333" : Theme.textDim
+        }
+    }
+}

roles/quickshell/files/bar/qmldir

@@ -1,4 +1,5 @@
 Bar 1.0 Bar.qml
+Battery 1.0 Battery.qml
 PopoutWindow 1.0 PopoutWindow.qml
 CalendarContent 1.0 CalendarContent.qml
 Clock 1.0 Clock.qml