shell: own the right sidebar, move garden into the drawer

Garden was welded onto the notification list in CenterWidgetGroup —
always on, unrelated, stealing space from notifications that said
"Nothing". Moved it into the BottomWidgetGroup drawer as a fifth tab
alongside Calendar, To Do, Pomodoro, and Stopwatch.

CenterWidgetGroup is now just the notification list. Lens events
(note_created, synced) emit through notify-send so they land in the
notification system properly.

Forked calendar, todo, pomodoro, notifications out of ii-base into
our tree — the right sidebar no longer borrows any widget files from
ii. Toggle dialogs (bluetooth, wifi, nightLight) still symlinked as
infrastructure.

surfaces/quickshell/modules/ii/sidebarRight/pomodoro/StopwatchWidget.qml

@@ -0,0 +1,63 @@
+import qs.services
+import qs.modules.common
+import qs.modules.common.widgets
+import QtQuick
+import QtQuick.Layouts
+
+Item {
+    id: root
+
+    Keys.onPressed: (event) => {
+        if (event.key === Qt.Key_Space || event.key === Qt.Key_S) {
+            TimerService.toggleStopwatch();
+            event.accepted = true;
+        } else if (event.key === Qt.Key_R) {
+            TimerService.stopwatchReset();
+            event.accepted = true;
+        } else if (event.key === Qt.Key_L) {
+            TimerService.stopwatchRecordLap();
+            event.accepted = true;
+        }
+    }
+
+    ColumnLayout {
+        anchors.fill: parent
+        spacing: 8
+
+        RowLayout {
+            Layout.fillWidth: true
+            Layout.leftMargin: 4
+            Layout.rightMargin: 14
+            spacing: 8
+
+            MaterialSymbol {
+                text: "timer"
+                iconSize: Appearance.font.pixelSize.hugeass
+                color: Appearance.colors.colOnSecondaryContainer
+            }
+
+            ColumnLayout {
+                Layout.fillWidth: true
+                spacing: 0
+
+                StyledText {
+                    text: Translation.tr("Stopwatch")
+                    font.pixelSize: Appearance.font.pixelSize.larger
+                    font.weight: Font.Medium
+                    color: Appearance.colors.colOnLayer1
+                }
+
+                StyledText {
+                    text: TimerService.stopwatchRunning ? Translation.tr("Running") : Translation.tr("Ready")
+                    font.pixelSize: Appearance.font.pixelSize.smaller
+                    color: Appearance.colors.colSubtext
+                }
+            }
+        }
+
+        Stopwatch {
+            Layout.fillWidth: true
+            Layout.fillHeight: true
+        }
+    }
+}