feat(ui): 更新复合叠层结果界面的加载状态显示

- 在加载状态下隐藏图标、标题和副标题视图
- 在加载状态下隐藏基础RecyclerView组件
- 在成功状态恢复显示标题和副标题视图
- 优化界面元素的可见性控制逻辑

app/src/main/java/com/nova/brain/glass/ui/CompositeLayupResultActivity.kt

@@ -127,6 +127,11 @@ class CompositeLayupResultActivity : BaseActivity<ActivityCompositeLayupResultBi
             when (state) {
                 CompositeLayupResultState.LOADING -> {
                     binding.hint.text = "OCR识别中，请稍后..."
+                    binding.icon.visibility = android.view.View.GONE
+                    binding.title.visibility = android.view.View.GONE
+                    binding.subtitle1.visibility = android.view.View.GONE
+                    binding.subtitle2.visibility = android.view.View.GONE
+                    binding.baseRecyclerView.visibility = android.view.View.GONE
                     renderActions(emptyList())
                 }
                 CompositeLayupResultState.SUCCESS -> {
@@ -205,6 +210,9 @@ class CompositeLayupResultActivity : BaseActivity<ActivityCompositeLayupResultBi
             }
         }
         binding.icon.visibility = android.view.View.VISIBLE
+        binding.title.visibility = android.view.View.VISIBLE
+        binding.subtitle1.visibility = android.view.View.VISIBLE
+        binding.subtitle2.visibility = android.view.View.VISIBLE
     }
 
     private fun buildInstruction(): String {