UI：M3E风格-Test-首页-done

Author: Fastace

source/core/ui/src/main/kotlin/com/xayah/core/ui/component/Scaffold.kt

@@ -10,6 +10,7 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.material3.Badge
 import androidx.compose.material3.BadgedBox
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.FabPosition                        // <-- 新增
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
@@ -42,6 +43,7 @@ fun MainIndexSubScaffold(
     updateAvailable: Boolean,
     onVersionChipClick: (() -> Unit)? = null,
     actions: @Composable RowScope.() -> Unit = {},
+    floatingActionButton: @Composable () -> Unit = {},               // <-- 新增
     content: @Composable (BoxScope.() -> Unit)
 ) {
     val context = LocalContext.current
@@ -96,6 +98,8 @@ fun MainIndexSubScaffold(
                 )
             }
         },
+        floatingActionButton = floatingActionButton,                 // <-- 新增
+        floatingActionButtonPosition = FabPosition.Center,           // <-- 新增
     ) { innerPadding ->
         Column {
             InnerTopSpacer(innerPadding = innerPadding)