feat(settings): add explicit border toggle and updated layouts

- Defaults On with blur enabled to clean up the border edges
- Darken Modal moves to Launcher settings

Closes #2446
port 1.5

quickshell/Common/SettingsData.qml

@@ -240,6 +240,8 @@ Singleton {
     onBlurForegroundLayersChanged: saveSettings()
     property real blurLayerOutlineOpacity: 0.12
     onBlurLayerOutlineOpacityChanged: saveSettings()
+    property bool blurBorderEnabled: true
+    onBlurBorderEnabledChanged: saveSettings()
     property string blurBorderColor: "outline"
     onBlurBorderColorChanged: saveSettings()
     property string blurBorderCustomColor: "#ffffff"

quickshell/Common/settings/SettingsSpec.js

@@ -70,6 +70,7 @@ var SPEC = {
     blurEnabled: { def: false },
     blurForegroundLayers: { def: true },
     blurLayerOutlineOpacity: { def: 0.12, coerce: percentToUnit },
+    blurBorderEnabled: { def: true },
     blurBorderColor: { def: "outline" },
     blurBorderCustomColor: { def: "#ffffff" },
     blurBorderOpacity: { def: 0.35, coerce: percentToUnit },