调整了部分问题

app/src/main/java/com/sw/platecabinet/adapter/GenericPageAdapter.kt

@@ -25,7 +25,18 @@ class GenericPageAdapter<T, VB : ViewBinding>(
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PageViewHolder {
         val view = LayoutInflater.from(parent.context).inflate(pageLayoutId, parent, false)
-        return PageViewHolder(view)
+        val holder = PageViewHolder(view)
+
+        // 在创建ViewHolder时设置ItemDecoration，只设置一次
+        holder.childRecyclerView.addItemDecoration(
+            GridSpacingItemDecoration(
+                spanCount = 2,
+                spacing = view.context.dpToPx(12),
+                includeEdge = true // 包含边缘间距
+            )
+        )
+
+        return holder
     }
 
     override fun onBindViewHolder(holder: PageViewHolder, position: Int) {
@@ -35,19 +46,13 @@ class GenericPageAdapter<T, VB : ViewBinding>(
     override fun getItemCount(): Int = pages.size
 
     inner class PageViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
-        private val childRecyclerView: RecyclerView = itemView.findViewById(R.id.childRecyclerView)
+        val childRecyclerView: RecyclerView = itemView.findViewById(R.id.childRecyclerView)
+
+        init {
+            childRecyclerView.layoutManager = GridLayoutManager(itemView.context, 2)
+        }
 
         fun bind(items: List<T>) {
-            childRecyclerView.layoutManager = GridLayoutManager(itemView.context, 2)
-
-            childRecyclerView.addItemDecoration(
-                GridSpacingItemDecoration(
-                    spanCount = 2, // 2列
-                    spacing = itemView.context.dpToPx(6), // 12dp
-                    includeEdge = true // 包含边缘间距
-                )
-            )
-
             childRecyclerView.adapter =
                 GenericItemAdapter(items, itemBindingInflater, itemBindCallback)
         }