quickshell: fix qml null safety and monitor property errors (#1770)

.config/quickshell/ii/modules/bar/ActiveWindow.qml

@@ -45,7 +45,7 @@ Item {
             elide: Text.ElideRight
             text: root.focusingThisMonitor && root.activeWindow?.activated && root.biggestWindow ? 
                 root.activeWindow?.title :
-                (root.biggestWindow?.title) ?? `${Translation.tr("Workspace")} ${monitor?.activeWorkspace?.id}`
+                (root.biggestWindow?.title) ?? `${Translation.tr("Workspace")} ${monitor?.activeWorkspace?.id ?? 1}`
         }
 
     }

.config/quickshell/ii/modules/bar/weather/WeatherBar.qml

@@ -21,7 +21,7 @@ MouseArea {
         
         MaterialSymbol {
             fill: 0
-            text: WeatherIcons.codeToName[Weather.data.wCode]
+            text: WeatherIcons.codeToName[Weather.data?.wCode] ?? "question_mark"
             iconSize: Appearance.font.pixelSize.large
             color: Appearance.colors.colOnLayer1
             Layout.alignment: Qt.AlignVCenter
@@ -31,7 +31,7 @@ MouseArea {
             visible: true
             font.pixelSize: Appearance.font.pixelSize.small
             color: Appearance.colors.colOnLayer1
-            text: Weather.data.temp
+            text: Weather.data?.temp ?? "--°"
             Layout.alignment: Qt.AlignVCenter
         }
     }