style: align LargeActionCard background with dynamic clash state

- Force null background on internal label root to ensure seamless inheritance of card color.
- Remove default surface background initialization to prevent visual artifacts in stopped state.
- Synchronize card radius and elevation with Material 3 design tokens.
- Disable card checkable state to prevent unwanted overlay layers in Monet mode.

Author: TanakaLun

design/src/main/java/com/github/kr328/clash/design/MainDesign.kt

@@ -82,7 +82,7 @@ class MainDesign(context: Context) : Design<MainDesign.Request>(context) {
         binding.self = this
 
         binding.colorClashStarted = context.resolveThemedColor(com.google.android.material.R.attr.colorPrimary)
-        binding.colorClashStopped = context.resolveThemedColor(R.attr.colorClashStopped)
+        binding.colorClashStopped = context.resolveThemedColor(com.google.android.material.R.attr.colorOnPrimaryContainer)
     }
 
     fun request(request: Request) {

design/src/main/java/com/github/kr328/clash/design/view/LargeActionCard.kt

@@ -36,9 +36,7 @@ class LargeActionCard @JvmOverloads constructor(
             binding.iconView.background = value
         }
 
-    init {
-        binding.root.background = null
-        
+    init {        
         context.resolveClickableAttrs(attributeSet, defStyleAttr) {
             isFocusable = focusable(true)
             isClickable = clickable(true)
@@ -64,6 +62,5 @@ class LargeActionCard @JvmOverloads constructor(
         cardElevation = context.resources.getDimension(R.dimen.large_action_card_elevation)
         strokeWidth = 0
         setContentPadding(0, 0, 0, 0)
-        isCheckable = false
     }
 }

design/src/main/res/layout/component_large_action_label.xml

@@ -6,7 +6,8 @@
         android:layout_gravity="center_vertical"
         android:gravity="center_vertical"
         android:orientation="horizontal"
-        android:paddingVertical="@dimen/large_item_padding_vertical" >
+        android:paddingVertical="@dimen/large_item_padding_vertical"
+        android:background="@{clashRunning ? colorClashStarted : colorClashStopped}" >
 
         <View
             android:id="@+id/icon_view"

design/src/main/res/values-v31/themes.xml

@@ -5,7 +5,7 @@
         <item name="android:textColorSecondary">?attr/colorOnSurfaceVariant</item>
         <item name="android:textColor">?attr/colorOnSurface</item>
         <item name="android:textColorHint">?attr/colorOutline</item>
-        <item name="colorClashStopped">?attr/colorSurface</item>
+        <item name="colorClashStopped">?attr/colorOnPrimaryContainer</item>
 
         <item name="textAppearanceHeadlineSmall">@style/TextAppearance.Material3.HeadlineSmall</item>
         <item name="textAppearanceBodyMedium">@style/TextAppearance.Material3.BodyMedium</item>
@@ -19,7 +19,7 @@
         <item name="android:textColorSecondary">?attr/colorOnSurfaceVariant</item>
         <item name="android:textColor">?attr/colorOnSurface</item>
         <item name="android:textColorHint">?attr/colorOutline</item>
-        <item name="colorClashStopped">?attr/colorSurface</item>
+        <item name="colorClashStopped">?attr/colorOnPrimaryContainer</item>
 
         <item name="textAppearanceHeadlineSmall">@style/TextAppearance.Material3.HeadlineSmall</item>
         <item name="textAppearanceBodyMedium">@style/TextAppearance.Material3.BodyMedium</item>